Zootaxa

Beetle Diversity on the Qinghai-Xizang Plateau: the Mêdog region (Title page)

WA DA — 2026-04-01

Beetle Diversity on the Qinghai-Xizang Plateau: the Mêdog region (Table of contents)

WA DA — 2026-04-01

**Range extension of Dhanya Andrewes (Coleoptera: Carabidae: Paussinae), with the first record for China**

JIA-HENG CHEN — 2026-04-01

**A new species of Webbia Hopkins, 1915 (Coleoptera: Curculionidae: Scolytinae: Xyleborini) from China**

WEI LIN — 2026-04-01

A new genus and three new species of Pterostichini (Coleoptera: Carabidae) from Mêdog, China

YA-NAN WANG — 2026-04-01

This study deals with the taxonomy of the tribe Pterostichini (Coleoptera: Carabidae) from Mêdog County, Xizang, China, where we describe one new genus, Medogia Wang & Shi gen. nov. (type species: Medogia mirabilis sp. nov.), and three new species: Medogia mirabilis Wang & Shi sp. nov. (type locality: Mêdog, 62K, 2794 m), Medogia melanaria Shi & Wang sp. nov. (type locality: Mêdog, Lage, 3270 m), and Pterostichus (Circinatus) medogensis Shi & Wang sp. nov. (type locality: Mêdog, 62K, 2794 m). To verify the establishment of the new genus, a preliminary phylogenetic analysis based on molecular data was conducted. As a result of this study, the Pterostichini fauna of Mêdog County comprises eight species, categorized as follows: three new species described herein, two species newly recorded from the county [Pterostichus (Pseudethira) rugosiceps Schmidt, 2012 and Nirmala odelli Andrewes, 1930], and three previously recorded species. Additionally, the male genitalia of P. rugosiceps are described and illustrated for the first time.

Asiacyon Mai, Jia, Ryndevich & Fikáček, 2024 (Coleoptera: Hydrophilidae: Sphaeridiinae: Megasternini) from southern Xizang, China

ZU-QI MAI — 2026-04-01

The genus Asiacyon Mai, Jia, Ryndevich & Fikáček, 2024 from southern Xizang, China is studied. Four species are added to it, three of which are described as new: Asiacyon sherpaicus sp. nov., A. trilobatus sp. nov. and A. zhangmuensis sp. nov. Cercyon spatifer Hebauer, 2002 is transferred to Asiacyon. All species are diagnosed and illustrated in detail.

**Three new species and a new record of Anacaena Thomson, 1859 from China, with taxonomic revision to two species (Coleoptera: Hydrophilidae: Chaetarthriinae)**

FENG-LONG JIA — 2026-04-01

Three new species of Anacaena Thomson, 1859 from China are described: Anacaena rinqenbungsiana sp. nov. (Xizang), A. robertangusi sp. nov. (Sichuan) and A. zhangdandanae sp. nov. (Guangxi). Anacaena jaegeri Komarek, 2007 is recorded from China for the first time (Xizang). The identity of two Chinese Anacaena species are clarified: Anacaena bulbifera Pu, 1964 is synonymized with Paracymus orientalis Orchymont, 1925 and Anacaena lushanensis Pu, 1964 with Paracymus atomus Orchymont, 1925. Detailed morphological descriptions and illustrations of the new species are provided, along with an updated checklist of Anacaena species recorded from China.

**Two new species of Coelostoma Brullé, 1835 from South Xizang, China (Coleoptera: Hydrophilidae: Sphaeridiinae)**

FENG-LONG JIA — 2026-04-01

Two new species of the water scavenger beetle subgenus Lachnocoelostoma Mouchamps, 1958, belonging to the genus Coelostoma Brullé, 1835 are described from southern Xizang Autonomous Region of China. Among the new species, Coelostoma (Lachnocoelostoma) change sp. nov. from Mêdog County is notable for its small body size (3.4–3.6 mm in length) and capitate-shaped median lobe of aedeagus. Coelostoma (Lachnocoelostoma) yi sp. nov. from Zhangmu County was co-occurring with Coelostoma (Lachnocoelostoma) gentilii Jia, Aston & Fikáček, 2014, but elytra without serial punctures laterally, male genitalia with median lobe rather slim. Seven species of the genus are known from Xizang up to now. Species diagnoses, detailed descriptions and illustrations of the new species are provided.

**Two new species and an additional faunistic record of Crenitis Bedel, 1881 from China (Coleoptera: Hydrophilidae: Chaetarthriinae)**

FENG-LONG JIA — 2026-04-01

Two new species of the genus Crenitis Bedel, 1881, Crenitis lianghongbini sp. nov. and C. nezha sp. nov., from the Xizang Autonomous Region and Yunnan Province, China, are described. Crenitis nepalensis Hebauer, 1994 is formally reported in China for the first time. The three species are diagnosed and illustrated, and the key to Chinese species of the subgenus Crenitis s. str. is updated.

Additional faunistic records of Protosternini from China (Coleoptera: Hydrophilidae: Sphaeridiinae)

ZU-QI MAI — 2026-04-01

Two species of the Oriental endemic tribe Protosternini Hansen, 1991 (Coleoptera: Hydrophilidae: Sphaeridiinae), Protosternum arunvallense Hebauer, 2002 and Rhombosternum birmanense J. Balfour-Browne, 1942, are reported from China for the first time. Protosternum arunvallense is the third known species of the genus Protosternum Sharp, 1890 in China, while R. birmanense is the first record of the genus Rhombosternum J. Balfour-Browne, 1942 for the country. Both species are diagnosed and illustrated based on Chinese specimens. An identification key to the Chinese species of Protosternini is provided.

**Two new species of Astenus Dejean, 1833 (Coleoptera: Staphylinidae: Paederinae) from Mêdog, China**

XIAO-YAN LI — 2026-04-01

Two new species of the paederine rove beetle genus Astenus Dejean, 1833 are described: A. medogensis sp. nov. and A. yarangensis sp. nov., both collected from Mêdog County, Xizang, China. Color plates of the habitus, antennae, abdominal segments VII–IX of the males, as well as the aedeagal structures are provided. In addition, a checklist of all known 30 species (including the two new species) of the genus Astenus from China is included.

**A new species of Cephalochetus Kraatz, 1859 (Coleoptera: Staphylinidae: Paederinae) from Mêdog, China**

XIAO-YAN LI — 2026-04-01

A new species of Cephalochetus Kraatz, 1859 from China is described: Cephalochetus zhangguohuai sp. nov. collected from Mêdog County, Xizang, China. Color plates of the habitus, maxillary palpi, abdomen with sternites and tergites of the males, as well as the aedeagal structures are provided.

**Three new species and additional records of Lobrathium Mulsant & Rey (Coleoptera: Staphylinidae: Paederinae) from China**

LEI HUANG — 2026-04-01

Material of the genus Lobrathium Mulsant & Rey, 1878 from the Chinese provinces of Zhejiang, Jiangxi, Hubei, Hunan, Guangdong, Guangxi, Chongqing, Guizhou, Yunnan, Xizang, Shaanxi and Gansu is examined. Eleven species were identified, eight of them described previously and three are newly described: L. gai Huang & Peng, sp. nov. (Gansu: Dangchang County), L. medogense Huang & Peng, sp. nov. (Xizang: Mêdog County), and L. xiang Huang & Peng, sp. nov. (Yunnan: Yun County). New provincial records are provided for L. bispinosum Assing, 2012 from Guangxi and for L. duplex Assing, 2012 from Xizang. Including the new taxa, 71 Lobrathium species are currently known from China.

**The genus Pinopellis Assing from Mêdog, China, with a new species (Coleoptera: Staphylinidae: Paederinae)**

XIAO-YAN LI — 2026-04-01

In this paper, two species collected from Mêdog County, Xizang, China are reported. A new species, Pinopellis linmeiyingae sp. nov. is described and P. nigripes (Cameron, 1914) is recorded for the first time from Xizang, China. Color plates of the habitus, antennae, maxillary palpi, labra, abdominal segments VIII–IX of the males, as well as the aedeagal structures are provided. Additionally, the key and list of four Chinese species of the genus Pinopellis Assing are given.

First report of the tribe Pselaphini from Xizang, with description of two new species (Coleoptera: Staphylinidae: Pselaphinae)

YONG-QIN ZHANG — 2026-04-01

The tribe Pselaphini is reported to occur in Xizang, with two new species being described from Mêdog and Zayü counties: Pselaphogenius dagmo Zhang & Yin, sp. nov. and Pselaphogenius xizangensis Zhang & Yin, sp. nov. Both taxa can be readily distinguished from all East Asian congeners by their external appearances, in combination with the characteristic aedeagal structures.

**Description of a new brachypterous species of Phelotrupes Jekel, 1866 from Xizang, China, with additional records of Geotrupes Latreille, 1797 (Coleoptera: Geotrupidae)**

YI-PING LUO — 2026-04-01

Phelotrupes (s. str.) brachypterus sp. nov. is described from Zayü County, Xizang, China. The new species is notably similar to the also brachypterous species P. (s. str.) imurai (Masumoto, 1995). Diagnostic characters of the new species, including the male genitalia, are illustrated. The first provincial records of Geotrupes (s. str.) corinthius Fairmaire, 1886 from Shaanxi and Xizang, G. (Glyptogeotrupes) castanipennis (Reitter, 1887) from Xizang and G. (Glyptogeotrupes) genestieri (Boucomont, 1905) from Yunnan and Xizang are reported. An annotated checklist of the family Geotrupidae recorded from Xizang, China, is also provided.

**Revised inventory of Chinese Ceratocanthinae (Coleoptera: Hybosoridae), emphasizing species from southeastern Xizang with description of a new species of Eusphaeropeltis Gestro**

CHENG-BIN WANG — 2026-04-01

A revised inventory of the 12 species of the subfamily Ceratocanthinae (Coleoptera: Hybosoridae) recorded thus far from China is presented, with four genera: Cyphopisthes Gestro, 1898 (2 spp.), Eusphaeropeltis Gestro, 1898 (2 spp.), Madrasostes Paulian, 1975 (5 spp.), and Pterorthochaetes Gestro, 1898 (3 spp.). Madrasostes feae (Gestro, 1898) and Pterorthochaetes dembickyi Ballerio, 2014 are newly included for China; an additional locality is reported for P. dembickyi; Eusphaeropeltis medogensis sp. nov. is described from Mêdog County. Photographic documentation of habitus and genitalia is provided for the focal taxa.

**Discussion of four species of Anomala Samouelle from Mêdog, Xizang and description of one new species of Melanopopillia Lin from Guangxi, China (Coleoptera: Scarabaeidae: Rutelinae)**

YUAN-YUAN LU — 2026-04-01

Four species comprising the so-called Anomala cinderella species-group are herein treated based on material recently collected from Mêdog and the contiguous Himalayan region. Members of this assemblage, including Anomala cinderella Arrow, 1917, A. liuhaoyii Zhao, 2025, A. pemako Zhao, 2025, and A. piliscutella Lin, 1981, are characterized by a distinctively testaceous to rufescent habitus and a pronotum densely clothed in elongate, yellowish setae. The present contribution provides a key to these species, detailed descriptions, differential diagnoses and distribution for each taxon. Furthermore, Melanopopillia guangxiensis sp. nov. is described from Guangxi Zhuang Autonomous Region.

An update to the taxonomy of Sericini (Coleoptera: Scarabaeidae: Sericinae) from Xizang, China

ZHI-YU YANG — 2026-04-01

In this paper we update the knowledge on the species of Sericini occurring in Xizang, China. Seven new species are described: Gynaecoserica medogensis Liu W., Ahrens & Yang, sp. nov., Maladera baibungensis Liu W., Ahrens & Yang, sp. nov., Neoserica jiagaensis Liu W., Ahrens & Yang, sp. nov., N. nyingchiana Liu W., Ahrens & Yang, sp. nov., N. parazhehaoi Liu W., Ahrens & Yang, sp. nov., N. virgula Liu W., Ahrens & Yang, sp. nov., and N. zhehaoi Liu W., Ahrens & Yang, sp. nov. The habitus and male genitalia of the new species are illustrated, and a map shows the distribution of the new species. Furthermore, new records of three known species are given.

**Notes on the genus Grouvellinus Champion, 1923 (Coleoptera: Elmidae) from Xizang Autonomous Region, China, with description of a new species**

RI-XIN JIANG — 2026-04-01

The genus Grouvellinus Champion, 1923 comprises 67 described species distributed across the Oriental and Palearctic regions. Species diversity of this genus is very high in mainland China, with 33 recorded species, and three of these were recorded from Xizang Autonomous Region, China. In the present paper, we describe a new Grouvellinus species from Mêdog County, a distribution map and a list of all species of Grouvellinus known from Xizang Autonomous Region are provided.

A new species and two new records of Dimini click beetles (Coleoptera: Elateridae) from Xizang, China

LU QIU — 2026-04-01

A new species of Dimini, Pseudocsikia xiaobini sp. nov., is described from Mêdog, Xizang, China. It resembles the type species of the genus Pseudocsikia rustica Schimmel & Platia, 1991 in its small body size, reduced hind wings, and large yellow spots on the distal portion of elytra, but differs in brown antennae, longer pronotal hind angles, an M-shaped notch near each of the pronotal hind angles, sparser pronotal punctation, more elongate elytra, and a quadrate expansion of the metacoxal plate. Penia foveolata Schimmel, 1998 and Penia imprimosa Schimmel, 2001 are newly recorded from China (Xizang), and the former is transferred to genus Megapenia Qiu, Ruan, Prosvirov & Kundrata, 2025: Megapenia foveolata (Schimmel, 1998) comb. nov. Habitus and diagnostic characters of all three species are illustrated, and a checklist and key to the Dimini of Xizang are provided. Additionally, the issues concerning the relationship between Paracsikia Schimmel & Platia and Pseudocsikia Schimmel & Platia have also been discussed.

**Two new species of Plateros Bourgeois, 1879 (Coleoptera: Lycidae) from Xizang, China**

CHENG-TAO WANG — 2026-04-01

Two new species of Plateros Bourgeois, 1879 are discovered from Xizang, China, and described as P. medogensis sp. nov. and P. yini sp. nov. The description is supported by illustrations of the habitus and male genitalia. The female of P. busynskyi (Bocáková, 1997) is recorded for the first time. A key to the species of Plateros from Xizang is provided.

**Definition of the Ichthyurus davidi species group (Coleoptera: Cantharidae), with description of new species and additional faunistic records from China**

WEN-WEN ZHANG — 2026-04-01

The Ichthyurus davidi species group is proposed based on the anatomical comparison. It comprises a total of nine species, including I. davidi Gestro, 1892, I. senensis Pic, 1926, I. laniger Gestro, 1891, I. platyurus Gestro, 1906, I. bisignatus Pic, 1926, I. maculicollis Gestro, 1888 (new record to China), I. luctuosus Gestro, 1891 (new record to China), I. vitalisi Gestro, 1918 (new record to China), and I. medogensis sp. nov. (China: Xizang). These species are illustrated with habitus and genital segments of both sexes, mesothoracic legs and aedeagus of the male, as well as internal genitalia of the female. A key for identification and a distribution map of this species group are provided.

**Taxonomic notes on the Lycocerus purpurascens species-group (Coleoptera: Cantharidae), with descriptions of two new species from China**

ZHENG YANG — 2026-04-01

The Lycocerus purpurascens species-group is redefined. Lycocerus purpurascens (Wittmer, 1978) is redescribed in detail. Another four species are assigned to this species-group, including L. safraneki (Švihla, 2004), L. benesi (Švihla, 2004), L. nigromaculatus sp. nov. (Sichuan, Chongqing, Hubei, Shaanxi) and L. medogensis sp. nov. (Xizang). These species are illustrated with habitus, aedeagus, as well as abdominal sternite VIII and internal reproductive organs of female. An identification key and a distribution map of the species-group are provided.

**New species and additional faunistic record of Taiwanocantharis Wittmer, 1984 from China (Coleoptera: Cantharidae)**

RUO-BING HUA — 2026-04-01

Taiwanocantharis shergaoensis (Wittmer, 1989) is recorded from China for the first time and redescribed herein. A new species of Taiwanocantharis is described from Xizang under the name of T. marginalis sp. nov. Both species are illustrated with habitus of both sexes, aedeagus, as well as female abdominal sternite VIII and reproductive systems.

**Description of a new species of Anthrenus Geoffroy from Xizang, China (Coleoptera: Dermestidae: Megatominae)**

XUAN ZHOU — 2026-04-01

A new species of Anthrenus Geoffroy, A. medogensis Zhou, Háva, Da & Bai, sp. nov., is described from Mêdog County, Xizang Autonomous Region, China. The new species is illustrated and compared with morphologically similar species: A. himalayensis Háva, Wachkoo & Maqbool, A. katrinkrauseae Háva, and A. occultus Háva. It differs from these species in the scale pattern, antennal structure, and male genitalia. Ecological observations and habitat photographs are also provided.

**A new species of the genus Clada Pascoe, 1887 from China (Coleoptera: Ptinidae: Eucradinae)**

ZHENG-ZHONG HUANG — 2026-04-01

Clada (Clada) nyingchiensis Huang sp. nov., a new species belonging to the tribe Hedobiini, is herein described from specimens collected in Mêdog and Zayü counties, located in Nyingchi City of Xizang Autonomous Region (China). Detailed morphological examination of habitus and key diagnostic characters is provided.

**Two new species of the genus Afissa Dieke, 1947 (Coleoptera: Coccinellidae) from Xizang, China**

MING-XIAO JIN — 2026-04-01

Two new species of Afissa Dieke, 1947 are described from Xizang, China: Afissa motuoensis sp. nov. and Afissa pyramidalis sp. nov. Diagnosis, description and illustrations are provided for both species.

**A taxonomic review of the genus Clitostethus Weise (Coleoptera: Coccinellidae), with descriptions of two new species from China**

XIU-FENG XIE — 2026-04-01

Nine species of the genus Clitostethus Weise, 1885 are revised, including the description of two new species: Clitostethus conensis Xie, Wang & Chen, sp. nov. and Clitostethus tongbiguanus Xie, Wang & Chen, sp. nov. Clitostethus luteoniger (Canepari, 1997) is recorded from China for the first time. A key to the Chinese species is provided. Nomenclatural history, diagnoses, detailed descriptions, illustrations, and distribution data for each species are presented. A catalogue of all known species in this genus is also included.

**A review of the genus Henosepilachna Li, 1961 (Coleoptera: Coccinellidae) from China**

MAO-LIN YE — 2026-04-01

In the present study, the taxonomy of the genus Henosepilachna Li, 1961 from China is revised to include 29 species. Four species are newly described: Henosepilachna bellatula Ye, Chen & Wang, sp. nov., Henosepilachna megista Ye, Chen & Wang, sp. nov., Henosepilachna tenuis Ye, Chen & Wang, sp. nov. and Henosepilachna hornoformis Ye, Chen & Wang, sp. nov. Henosepilachna genitalis Hoàng, 1977 is recorded from China for the first time. Diagnosis, detailed description and illustrations for each species are presented. A key to the Chinese species of Henosepilachna is also given.

**Review of the genus Micraspis Chevrolat, 1836 (Coleoptera: Coccinellidae) from China and Laos, with description of three new species**

ZI-HAO ZHU — 2026-04-01

The genus Micraspis Chevrolat, 1836 from China and Laos is reviewed. Fourteen species are described and illustrated, including three new species, M. elongata Zhu, Chen & Wang sp. nov., M. filapicis Zhu, Chen & Wang sp. nov., and M. varimacula Zhu, Chen & Wang sp. nov. M. pusilla Poorani, 2014, M. tenuilinea (Walker, 1859) and M. kiotoensis (Nakane & Araki, 1960) stat. rev. are firstly recorded from China. The genus Micraspis is firstly recorded from Laos. A key and a distribution map of the known species are also presented.

Pelecotoides xui sp. nov., the third Asian species of Pelecotoides Laporte from Xizang, China (Coleoptera: Ripiphoridae: Ptilophorinae)

CHENG-BIN WANG — 2026-04-01

Pelecotoides Laporte, 1833 (Coleoptera: Ripiphoridae: Ptilophorinae) is reported from western China for the first time; a new species, P. xui sp. nov., is described and illustrated from Xizang. A key to the three Asian species of Pelecotoides is provided.

**Four new species of the genus Blaps Fabricius, 1775 from Xizang, China (Coleoptera: Tenebrionidae: Blaptinae: Blaptini)**

BAOYUE ZHANG — 2026-04-01

With 214 species, the genus Blaps Fabricius, 1775 is one of the most diverse genera of the tribe Blaptini. In this study, we reconstructed a preliminary phylogenetic tree based on cytochrome c oxidase subunit I (COⅠ) sequences from 41 species, and 38 species belong to the subgenera Ablapsis Reitter, 1887, Blaps Fabricius, 1775 and Nalepa Reitter, 1887 from China. Furthermore, four new species from Xizang, China are described and illustrated: Blaps (Blaps) miranda Li, sp. nov., B. (Ablapsis) tuberculata Li, sp. nov., B. (A.) asperula Li, sp. nov. and B. (A.) gracilis Li, sp. nov. In addition, a key to 18 species of the subgenus Ablapsis is provided. The results of the phylogenetic analyses suggest that the nominotypical subgenus is likely paraphyletic, indicating a need for further phylogenetic studies to clarify the status of the various subgenera.

**Three new species of the genus Foochounus Pic, 1921 (Coleoptera: Tenebrionidae: Stenochiinae) from Xizang, China**

QUAN-YU JI — 2026-04-01

Three new species of the genus Foochounus Pic, 1921 from Xizang, China, F. chumbicus sp. nov., F. medogicus sp. nov., and F. nyingchicus sp. nov., are described. Foochounus chumbicus sp. nov. represents the first species of the genus with reduced hind wings recorded from China. Habitus and characters of the new species are illustrated. Twelve Chinese species of the genus Foochounus are listed.

**New species and new records of the genus Hexarhopalus Fairmaire, 1891 (Coleoptera: Tenebrionidae: Cnodalonini) from China**

QUAN-YU JI — 2026-04-01

Two new species of the subgenus Leprocaulus Fairmaire, 1896 within the genus Hexarhopalus Fairmaire, 1891 from China are described and figured: H. (L.) medogensis sp. nov. (Xizang), and H. (L.) umbratus sp. nov. (Yunnan). New records of its congeners are also given and figured: H. (L.) binhanus (Pic, 1922) and H. (L.) pacholatkoi Bečvář & Purchart, 2008 are reported as new to China (Yunnan); H. (L.) bisinuatus Ren & Xu, 2011 is reported from Chongqing and Guangxi for the first time; and H. (L.) nanlingensis Jiang, Li, Ji, Engel & Wang, 2021 is reported from Guangxi for the first time. All Chinese species of the subgenus Leprocaulus are keyed.

**A new Lagria Fabricius, 1775 from Xizang, China, with a checklist of Lagriini in Mêdog County (Coleoptera: Tenebrionidae: Lagriinae)**

YONG ZHOU — 2026-04-01

Lagria (Lagria) cona sp. nov. is described from Cona City, Xizang, China. Key diagnostic characters include the bicolour elytra, meso- and metatibiae finely serrate in distal half, and the shape of the aedeagus. A checklist of Lagriini from Mêdog County is also presented.

**A new species of the genus Menimus Sharp, 1876 (Coleoptera: Tenebrionidae: Diaperinae) from Mêdog, Xizang, China**

XING-LONG BAI — 2026-04-01

The Chinese species of the genus Menimus Sharp, 1876 are summarized. Nine species are reported in this study, including a new species, M. (M.) medogensis sp. nov., from Xizang. The new species differs from its congeners most notably by the male parameres being strongly emarginate medially on lateral sides, and its larger body size. Habitus and characters of the new species are illustrated. All Chinese species of the genus are listed and keyed.

**Discovery of Morphostenophanes Pic, 1925 (Coleoptera: Tenebrionidae: Stenochiinae) in Xizang, China, with description of a new species**

DE-YAO ZHOU — 2026-04-01

This study reports the first occurrence of the tenebrionid genus Morphostenophanes Pic, 1925 from Xizang, China, and describes a new species, M. medogensis Zhou & Zhang, sp. nov. Illustrations of the habitus and key diagnostic characters are provided to distinguish the new taxon from its congeners.

**Two new species of Strongylium Kirby (Coleoptera: Tenebrionidae) from Xizang, China**

BO WU — 2026-04-01

Two new species of the genus Strongylium Kirby, 1819 from Xizang, China were discovered and are described under the names of S. (s. str.) beibengense sp. nov. (Mêdog) and S. (s. str.) medogense sp. nov. (Mêdog and Bomi). Illustrations of the habitus and diagnostic features are presented.

Review of Pyrochroidae (Coleoptera: Tenebrionoidea) from Mêdog, China, with descriptions of two new species

QI GAO — 2026-04-01

Pyrochroidae Latreille, 1806 exhibits a broad distribution spanning all major regions of the world except Antarctica. In the present comprehensive review of the family from Mêdog County, Xizang, five species representing three genera within two subfamilies are recorded. Among them, two new Pseudopyrochroa species, P. concava Gao, Young & Z. Pan, sp. nov. and P. nyingchica Gao, Young & Z. Pan, sp. nov., were discovered and are described herein. Agnathus secundus Jelínek & Kubáň, 2009 and P. antennalis (Blair, 1912) are recorded for the first time in the county. Dorsal habitus and morphological details relating to the four species above are illustrated. A key to the five pyrochroid species of Mêdog is provided.

**A review of Omadius Laporte de Castelnau, 1836 (Coleoptera: Cleridae) from Mêdog, Xizang, China, with descriptions of three new species**

GAN-YAN YANG — 2026-04-01

Five species of Omadius are reported from Mêdog, Xizang, China. Three are described as new: Omadius bii sp. nov.; O. medogensis sp. nov.; and, O. changchini sp. nov. In addition, O. parviceps (Gorham, 1892) is newly recorded from China. Two names are placed in synonymy with O. zebratus (Westwood, 1852): O. apicicornis Pic, 1927 syn. nov.; and O. alishanus Nakane, 1996 syn. nov. Furthermore, O. chapaensis Pic, 1927 syn. nov. is synonymized with O. parviceps, and O. pectoralis Schenkling, 1912 sp. reinst. is removed from synonymy with O. tricinctus Gorham, 1892. An identification key and illustrations of habitus, male terminalia, and other diagnostic features are provided. This review will be valuable for future faunal studies on Omadius in China and the Himalaya.

**A new species of Mimothrix Majer, 1989 (Coleoptera: Dasytidae) from Xizang, China**

JIA-LIN MIAO — 2026-04-01

A new dasytid species of the genus Mimothrix Majer, 1989 is discovered from Mêdog, Xizang, China, and described as M. medogensis Yang & Miao, sp. nov. The description is supported by illustrations of the habitus, pygidium, abdominal sternite VIII, and genitalia of both sexes. The new species can be readily distinguished from other species of Mimothrix by its relatively short and stout median lobe, which is regularly shaped at base and blunt at apex. Additionally, M. montivaga Majer, 1995, is redescribed in detail and illustrated with habitus, pygidium and abdominal sternite VIII of both sexes, as well as the female genitalia for the first time, to make comparison with the new species.

Checklist of Erotylinae (Coleoptera: Erotylidae) from Mêdog County, Xizang, China, with five new country records

YUN-JIE JIA — 2026-04-01

Fourteen Erotylinae species from Mêdog County, Xizang, China are listed. Among these, five species are newly recorded for China: Episcapha hypocrita Heller, 1918, Episcapha quadrimacula (Wiedemann, 1823), Nesitis discrepans Bedel, 1882, Aulacochilus oblongus Arrow, 1925, and Amblyopus substriatus Gorham, 1896. All fourteen species are new records for Xizang. A key and distribution map for Erotylinae species known from Mêdog County are presented. Habitus images of the newly recorded species for the country are provided. This study documents the species composition of the subfamily Erotylinae in Mêdog County, providing valuable data for biodiversity conservation efforts in southeastern Xizang.

**Review of the Chinese Megahyliota Thomas, 2004 (Coleoptera: Silvanidae: Brontinae), with description of a new species**

ZHEN-HUA LIU — 2026-04-01

Three species of the genus Megahyliota Thomas are recorded from the southwest of China, with description of a new species, Megahyliota angustus sp. nov. from Mêdog, Xizang; Megahyliota feae (Grouvelle, 1892) is newly recorded from China and redescribed. Megahyliota cryptolucidus is firstly recorded from Yunnan. Illustrations of the habitus and diagnostic characters are provided, with a key to species of the genus.

**Three new species of Aethina Erichson, 1843 from China (Coleoptera: Nitidulidae: Nitidulinae)**

HUAN ZHANG — 2026-04-01

Three new species of the subgenus Aethina Erichson, 1843 from China are described and illustrated. Aethina (Aethina) arciformis Zhang & Huang, sp. nov. is described from Shanghai and belongs to the A. flavicollis species-group. Aethina (Aethina) montis Zhang, Huang & Huang, sp. nov. is described from Fugong, Yunnan Province, and belongs to the A. argus species-group. Aethina (Aethina) medogensis Zhang & Huang, sp. nov. is described from Mêdog, Xizang autonomous region, and belongs to the A. elongata species-group.

New species and new records of Cryptarchinae (Coleoptera: Nitidulidae) from China

QING XU — 2026-04-01

New species Glischrochilus (Librodor) parvorubellus sp. nov. from China and Nepal is described and illustrated. Two additional genus-group taxa, Glischrochilus s. str. and Eucalosphaera Jelínek, 1978, as well as eight species of the subfamily Cryptarchinae, i.e. Glischrochilus (Glischrochilus) cruciatus (Motschulsky, 1860), Cryptarcha strigata (Fabricius, 1787), C. dubia Grouvelle, 1890, Eucalosphaera feae (Grouvelle, 1892), E. grouvellei Kirejtshuk, 1987, E. oculipennis Kirejtshuk, 1994, E. ocularis (Reitter, 1875), and E. rufescens Kirejtshuk, 1987 are reported from China for the first time.

**A review of the genus Nadezhdiella Plavilstshikov, 1931 (Coleoptera: Cerambycidae: Cerambycinae: Cerambycini), with the description of a new species from Xizang, China**

MEI-YING LIN — 2026-04-01

The genus Nadezhdiella Plavilstshikov, 1931 is preliminarily reviewed and a new species, N. hekaijii Lin, He & Li, sp. nov. from Mêdog County, Xizang, China, is described. Illustrations of the habitus and genitalia of N. hekaijii and its two congeners, N. cantori (Hope, 1842) and N. fulvopubens (Pic, 1933), are provided. Additionally, new locality records for N. cantori and a key to the six known species of the genus are included.

**A study of the genus Neocerambyx J. Thomson (Coleoptera: Cerambycidae: Cerambycinae: Cerambycini) from China, with the description of a new species**

MEI-YING LIN — 2026-04-01

One new species of the genus Neocerambyx J. Thomson, 1861, N. huai Lin & Zhang, sp. nov. is described from Guangdong, China. The genitalia pictures and descriptions are provided for three recently published species: N. liyuani Lin, Miroshnikov & He, 2025, N. miaobenfui Lin, Miroshnikov & He, 2025, and N. gui Lin, Miroshnikov & He, 2025. Neocerambyx atratulus (Holzschuh, 2018) from Mêdog, Xizang is recorded from China for the first time.

**A new beetle species, Dactylispa (Triplispa) sicieni sp. nov. (Coleoptera: Chrysomelidae: Cassidinae: Hispini) from Xizang, China**

ZHENG-ZHONG HUANG — 2026-04-01

Mêdog County, Xizang Autonomous Region, is situated at the eastern edge of the Himalaya. Almost no survey of Cassidinae (Coleoptera: Chrysomelidae) has been done there. Here we describe one new species, Dactylispa (Triplispa) sicieni sp. nov., based on six specimens collected during an insect biodiversity survey conducted in 2024. The new species can be readily separated from other congeners by pronotum yellowish, each elytron bearing only two primary spines on the second elytral interval.

**Revision of Longitarsus cyanipennis species group, with description of eleven new species (Coleoptera: Chrysomelidae: Galerucinae: Alticitae)**

ZU-LONG LIANG — 2026-04-01

Fifteen species belonging to the Longitarsus cyanipennis species group are revised. All species are described or redescribed, accompanied by images of external morphology and genitalia. A key to the species of the group is provided. Eleven new species are described: L. bryanti Liang & Konstantinov sp. nov., L. jinpingensis Liang & Konstantinov sp. nov., L. lijiangensis Liang & Konstantinov sp. nov., L. lodayi Liang & Konstantinov sp. nov., L. mauliki Liang & Konstantinov sp. nov., L. latipenis Liang & Konstantinov sp. nov., L. medogensis Liang & Konstantinov sp. nov., L. radialis Liang & Konstantinov sp. nov., L. viridis Liang & Konstantinov sp. nov., L. volkovitshi Liang & Konstantinov sp. nov., and L. zhejiangensis Liang & Konstantinov sp. nov. Longitarsus warchalowskii Scherer, 1969 is resurrected from synonymy with L. indigonaceus Lopatin, 1963, while L. indigonaceus Lopatin, 1963 syn. nov. is proposed as a junior synonym of L. cyanipennis Bryant, 1924. Amongst the species group, four species are recorded in Mêdog County, i.e., L. warchalowskii, L. bryanti sp. nov., L. latipenis sp. nov., and L. medogensis sp. nov.

The flea beetle fauna of Mêdog, China, with description of three new species (Coleoptera: Chrysomelidae: Galerucinae: Alticitae)

YING-YING PENG — 2026-04-01

Based on the study of specimens from China’s two largest flea beetle collections (SZPU and IZCAS), this paper reviews the flea beetle fauna (Alticitae) of Mêdog, Xizang, China. In addition to a catalogue and photographs for most species, three new species from Mêdog are described: Sinocrepis medogensis sp. nov., Longitarsus acutus sp. nov., and Longitarsus gracilicallus sp. nov. Keys to Sinocrepis species of China and to Longitarsus species of Mêdog are provided. Moreover, Longitarsus yangsoensis Chen, 1939 syn. nov. is proposed as a junior synonym of Longitarsus championi Maulik, 1926; and Longitarsus ochraceicornis Maulik, 1926 is recorded from China for the first time.

**A new species and a new record of Morphosphaera Baly, 1861 (Coleoptera: Chrysomelidae: Galerucinae) from China**

CHANG-PING DING — 2026-04-01

A new species of Morphosphaera Baly from Mêdog County, Xizang Autonomous Region is described: M. medogensis sp. nov., and a newly recorded species from China is reported: M. montivaga Maulik. Illustrations of the habitus and external genitalia of these species are provided, along with a key and a checklist of all known Morphosphaera species worldwide. And the new provincial distribution of Morphosphaera in China has been added.

Orthosinus medogensis sp. nov. (Coleoptera: Curculionidae: Dryophthorinae) from Xizang, China, with notes on the synonymy of Xerodermus Lacordaire under Orthosinus Motschulsky

HE-YU LÜ — 2026-04-01

Orthosinus medogensis sp. nov., collected in Mêdog County, Xizang Autonomous Region, is described and illustrated. Morphologically, the new species is most similar to O. dudkoi but can be distinguished by the larger body size, shallow transverse sulcus between frons and rostrum, more rugose surface of the rostrum, and parallel-sided form of the pedon. Furthermore, this study addresses the long-standing taxonomic controversy regarding Xerodermus by treating it as a junior synonym of Orthosinus based on the re-examination of published type images, which reveal that the key diagnostic character of ventral eye separation is variable and unreliable at the generic level. Additionally, X. porcellus is recognized as a valid species within Orthosinus.

Preface: Beetle diversity on the Qinghai-Xizang Plateau: the Mêdog region

GUO-DONG REN — 2026-04-01

Introduction: Beetle Diversity on the Qinghai-Xizang Plateau: the Mêdog region

WA DA — 2026-04-01