Abstract
The species-rich Ambrysus signoreti Stål species complex is diagnosed and subdivided into three sections based on morphology of the female subgenital plate. The species in the first section, characterized by the posterior margin of the subgenital plate with posterolateral corners extending posteriorly further than the central lobe, are revised. The group includes four species: two previously described from Mexico (Ambrysus cosmius La Rivers, A. schuhi Reynoso & Sites), one from Costa Rica (A. variegatus Usinger), and a new species, A. morelosensis n. sp., from central Mexico. The description of the new species and transfer of A. mormon Montandon to the A. guttatipennis Stål species complex brings the total number of species in the complex to 24 and the total number of described species of Ambrysus to 68. Also, an illustrated key to the species in this first section of the complex is provided. Finally, we present new state records from Mexico for A. cosmius and new province records from Costa Rica for A. variegatus.
References
Davis, J.R. (1986) New distribution records of Naucoridae (Hemiptera) from the United States and Mexico, with morphological and taxonomic notes. The Southwestern Naturalist, 31, 535–539. https://doi.org/10.2307/3671711
Herrera, F. (2013) Estado del conocimiento y catálogo de la familia Naucoridae (Insecta: Heteroptera) en Centroamérica. Dugesiana, 20 (2), 221–232.
La Rivers, I. (1951) A revision of the genus Ambrysus in the United States (Hemiptera: Naucoridae). University of California Publications in Entomology, 8 (7), 277–338.
La Rivers, I. (1953) The Ambrysus of Mexico (Hemiptera, Naucoridae). The University of Kansas Science Bulletin, 35, 1279–1349. https://doi.org/10.5962/bhl.part.26731
La Rivers, I. (1957) A new Ambrysus from Mexico (Hemiptera, Naucoridae). Entomological News, 68, 232–237.
La Rivers, I. (1971) Studies of Naucoridae (Hemiptera). Biological Society of Nevada Memoirs, 2, 1–120. https://doi.org/10.5962/bhl.part.5887
Morrone, J.J. (2014) Biogeographical regionalisation of the Neotropical region. Zootaxa, 3782 (1), 1–110. https://doi.org/10.11646/zootaxa.3782.1.1
Reynoso-Velasco, D. (2021a) A new species of Ambrysus Stål from the Central Mexican Plateau and new state records for species of the genus in the country (Heteroptera: Nepomorpha: Naucoridae). Zootaxa, 5005 (3), 304–316. https://doi.org/10.11646/zootaxa.5005.3.5
Reynoso-Velasco, D. (2021b) Distribution of the saucer bug Ambrysus signoreti Stål, 1862 (Heteroptera, Nepomorpha, Naucoridae, Ambrysinae). Check List, the Journal of Biodiversity Data, 17 (6), 1585–1591. https://doi.org/10.15560/17.6.1585
Reynoso-Velasco, D. & Sites, R.W. (2016a) Revision of the Ambrysus guttatipennis Stål species complex (Heteroptera: Naucoridae: Cryphocricinae) with the description of six new species from Mexico. Zootaxa, 4154 (3), 201–250. https://doi.org/10.11646/zootaxa.4154.3.1
Reynoso-Velasco, D. & Sites, R.W. (2016b) Revision of the Ambrysus hybridus Montandon species complex (Heteroptera: Naucoridae: Cryphocricinae) with the description of a new species from Mexico. Zootaxa, 4169 (1), 87–114. https://doi.org/10.11646/zootaxa.4169.1.4
Reynoso-Velasco, D. & Sites, R.W. (2018a) Revision of the Ambrysus pulchellus Montandon species complex (Heteroptera: Nepomorpha: Naucoridae). Zootaxa, 4442 (3), 351–377. https://doi.org/10.11646/zootaxa.4442.3.1
Reynoso-Velasco, D. & Sites, R.W. (2018b) Revision of the Ambrysus pudicus Stål species complex (Heteroptera: Nepomorpha: Naucoridae) with the description of a new species from southern Mexico. Zootaxa, 4491 (1), 1–64. https://doi.org/10.11646/zootaxa.4491.1.1
Reynoso-Velasco, D. & Sites, R.W. (2019a) Descriptions of four new species of the Ambrysus signoreti Stål species complex (Heteroptera: Nepomorpha: Naucoridae). Zootaxa, 4615 (2), 285–302. https://doi.org/10.11646/zootaxa.4615.2.3
Reynoso-Velasco, D. & Sites, R.W. (2019b) Taxonomic overview of the family Naucoridae (Heteroptera: Nepomorpha) in Mexico. Dugesiana, 26, 3–12. https://doi.org/10.32870/dugesiana.v26i1.7055
Reynoso-Velasco, D. & Sites, R.W. (2021) Molecular phylogeny and revised classification of the New World subfamily Cryphocricinae, including the reinstatement of Ambrysinae (Insecta: Heteroptera: Nepomorpha: Naucoridae). Systematic Entomology, 46, 900–914. https://doi.org/10.1111/syen.12501
Reynoso-Velasco, D., Sites, R.W. & Novelo-Gutiérrez, R. (2016) The Ambrysus Stål (Heteroptera: Naucoridae: Cryphocricinae) of Mexico: Revision of the subgenus Syncollus La Rivers. Zootaxa, 4126 (1), 44–76. https://doi.org/10.11646/zootaxa.4126.1.2
Sites, R.W., Rodrigues H.D.D. & Reynoso-Velasco, D. (2017) New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa, 4323 (4), 503–518. https://doi.org/10.11646/zootaxa.4323.4.4
Shorthouse, D.P. (2010) SimpleMappr, an online tool to produce publication-quality point maps. Available from: http://www.simplemappr.net (accessed 15 November 2022)
Usinger, R.L. (1946) Notes and descriptions of Ambrysus Stål with an account of the life history of Ambrysus mormon Montd. (Hemiptera, Naucoridae). The University of Kansas Science Bulletin, 31, 185–210.