Abstract
Based on well preserved specimen, Gonialaena groehni gen. et sp. nov. (Coleoptera: Tenebrionidae) is described from Eocene Baltic amber and assigned to Gonialaenini trib. nov. within the subfamily Lagriinae due to the combination of the following characters: labrum elongate; antennal sensilla simple; procoxal cavities closed at least externally; narrow membranes present between abdominal ventrites 3–5; mesocoxal cavities partly closed by mesepimeron, trochantine present; ovipositor of primitive lagrioid type—digitate fourth coxite lobe with gonostyles apically. Gonialaena gen. nov. combines characters of various Lagriinae tribes: humeral angles rounded, formed by basally widened epipleura as in Goniaderini, Pycnocerini and Lupropini; narrow acute intercoxal process of abdominal ventrite 1 as in Belopini, Cossyphini and Lagriini; absence (or strong reduction) of metathoracic wings as in most Adeliini and some Lupropini; large, reniform eyes as in Goniaderini, Pycnocerini, Lagriini and many Adeliini; present intersegmental membranes between abdominal ventrites 3–5 as in all lagriine tribes except for Belopini and Cossyphini; subcylindrical terminal maxillary palpomere as in Belopini and Cossyphini. Thus, the position of Gonialaenini trib. nov. within Lagriinae is not fully understood, but combination of certain features (humeral angles rounded but distinct and vertical border present at elytral base, inconspicuous elytral striae, large reniform eyes, narrow intersegmental membranes) points on morphological similarity with Goniaderini, especially some Anaedus Blanchard, 1845 with indistinct elytral striae and related genera.
References
Aalbu, R.L., Kanda, K. & Smith, A.D. (2017) Reinstatement of Eschatoporiini Blaisdell, 1906, a unique tribe of blind cavernicolous Tenebrionidae from California, with a new species from Napa County (Coleoptera, Tenebrionidae, Lagriinae). ZooKeys, 688, 135–149.
https://doi.org/10.3897/zookeys.688.13575
Alekseev, V.I. & Nabozhenko, M. (2015) A new fossil tenebrionid beetle of the tribe Palorini (Coleoptera: Tenebrionidae) from Eocene Baltic amber. The Coleopterists Bulletin, 69, 127–130.
https://doi.org/10.1649/0010-065X-69.mo4.127
Alekseev, V.I. & Nabozhenko, M.V. (2017) Palorus platycotyloides sp. n., the second fossil representative of the tribe Palorini (Coleoptera: Tenebrionidae) from Baltic amber. Acta Zoologica Bulgarica, 69, 167–170.
Bouchard, P., Lawrence, J.F., Davies, A.E. & Newton, A.F. (2005) Synoptic classification of the world Tenebrionidae (Insecta: Coleoptera) with a review of family-group names. Annales zoologici, 55 (4), 499–530.
Doyen, J.T., Matthews, E.G. & Lawrence, J.F. (1990) Classification and annotated checklist of the Australian genera of Tenebrionidae (Coleoptera). Invertebrate Taxonomy, 3 (1989), 229–260.
https://doi.org/10.1071/IT9890229
Doyen, J.T. & Poinar, G.O. Jr. (1994) Tenebrionidae from Dominican amber (Coleoptera). Entomologica Scandinavica, 25, 27–51.
https://doi.org/10.1163/187631294X00027
Endrödy-Younga, S. & Schawaller, W. (2002) First record of Laenini (Coleoptera: Tenebrionidae) from South Africa, with descriptions of two new genera and several new species. Annals of the Transvaal Museum, 39, 9–21.
Hieke, F. & Pietrzeniuk, E. (1984) Die Bernstein-Käfer des Museums für Naturkunde, Berlin (Insecta, Coleoptera). Mitteilungen aus dem Zoologischen Museum Berlin, 60 (2), 297–326.
Kirejtshuk, A.G., Merkl, O. & Kernegger, F. (2008) A new species of the genus Pentaphyllus Dejean, 1821 (Coleoptera, Tenebrionidae, Diaperinae) from the Baltic amber and checklist of the fossil Tenebrionidae. Zoosystematica Rossica, 17, 131–137.
Klebs, R. (1910) Über Bernsteineinschlüsse in allgemeinen und die Coleopteren meiner Bernsteinsammlung. Schriften der Physikalisch-ökonomischen Gesellschaft, 51, 217–242.
Larsson, S.G. (1978) Baltic Amber—a Palaeological Study. Entomonograph, Vol 1. Scandinavian Science Press Ltd., Klampenborg, 192 pp.
Matthews, E.G. & Bouchard, P. (2008) Tenebrionid Beetles of Australia: Descriptions of Tribes, Keys to Genera, Catalogue of Species. Australian Biological Resources Study, Canberra, 410 pp.
Matthews, E.G., Lawrence, J.F., Bouchard, P., Steiner, W.E., Ślipiński, Jr. & Ślipiński, S.A. (2010) 11.14. Tenebrionidae Latreille, 1802. In: Leschen, R.A.B, Beutel, R.G. & Lawrence, J.F. (Eds.), Handbook of zoology. Arthropoda: Insecta. Part 38. Coleoptera, beetles. Vol. 2. Morphology and systematics (Elateroidea, Bostrichiformia, Cucujiformia partim). Walter de Gruyter, Berlin, pp. 574–659.
Nabozhenko, M.V. & Chigray, I.A. (2018) New species of Alleculinae (Coleoptera: Tenebrionidae): extant from Lebanon and extinct from Eocene Baltic Amber. Caucasian Entomological Bulletin, 14 (2), 171–176
https://doi.org/:10.23885/181433262018142-171176
Nabozhenko, M.V., Kirejtshuk, A. & Merkl, O. (2016a) Yantaroxenos colydioides gen. and sp. n. (Tenebrionidae: Lagriinae) from Baltic Amber. Annales zoologici, 66, 563–566.
https://doi.org/10.3161/00034541ANZ2016.66.4.008
Nabozhenko, M.V., Perkovsky, E.E. & Chernei, L.S. (2016b) A new species of the genus Nalassus Mulsant (Coleoptera: Tenebrionidae: Helopini) from the Baltic amber. Paleontological Journal, 50, 947–952.
https://doi.org/10.1134/S0031030116090082
Schawaller, W. (2002) Malayoscelis gen. n., the third genus of the Pycnocerini (Coleoptera: Tenebrionidae) from the Oriental Region. Acta Zoologica Academiae Scientiarum Hungaricae, 48 (3), 197–202.
Schawaller, W. (2008) The genus Laena Latreille (Coleoptera: Tenebrionidae) in China (part 2), with descriptions of 30 new species and a new identification key. Stuttgarter Beiträge zur Naturkunde A (Biologie), Neue Serie 1, 387–411.
Schawaller, W. (2014) New species of the genus Laena Dejean (Coleoptera: Tenebrionidae) from Southeastern Asia (2). Annales Zoologici, 64 (2), 287–298.
https://doi.org/10.3161/000345414x682490
Soldati, F. & Nabozhenko, M. (2017) Asida groehni sp. nov., the first and the oldest fossil representative of the subfamily Pimeliinae from Eocene Baltic amber (Coleoptera: Tenebrionidae: Asidini). Annales zoologici, 67, 555–559.
https://doi.org/10.3161/00034541ANZ2017.67.3.003
Tschinkel, W.R. & Doyen, J.T. (1980) Comparative anatomy of the defensive glands, ovipositors and female tubes of tenebrionid beetles (Coleoptera). International journal of insect morphology and embryology, 9, 321–368.
https://doi.org/10.1016/0020-7322(80)90009-4