Kachinus
| Kachinus Temporal range:Upper Cretaceous(Cenomanian?)[1]
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|---|---|
Scientific classification
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Family: | Staphylinidae |
| Subfamily: | Scydmaeninae |
| Supertribe: | Scydmaenitae |
| Genus: | †Kachinus Chatzimanolis,Engel,&Newton,2010 |
| Species: | †K. antennatus
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| Binomial name | |
| †Kachinus antennatus Chatzimanolis, Engel & Newton, 2010
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Kachinusis an extinct genus ofant-like stone beetlein the familyStaphylinidaecontaining the single speciesKachinus antennatus.[2]
History and classification[edit]
Thetype species,K. antennatus,is known from only theholotype,a single, complete adult, now deposited in theAmerican Museum of Natural Historyas specimen number "AMNH Bu-113". Theamberspecimen is from deposits inKachin State,Tanai Village, 105 kilometres (65 mi) northwest ofMyitkyina,Myanmar.[2]
The holotype was first studied byStylianos Chatzimanolisof theUniversity of Tennessee,Michael Engelof theUniversity of Kansas,andAlfred Newtonof theField Museum.[2]Chatzimanolis, Engel and Newton published their 2010type descriptionforK. antennatusin the journalCretaceous Research.The genus name is a masculine derivation of theKachin Statein Northern Myanmar where the amber containing the type specimen was unearthed. The species nameantennatusisLatin,signifying "antennaed".[2]
The second species,K. magnificus,was described from theAlbianamber from Spain;[3]however, this species was subsequently made the type species of a separate genusArcheutheiaby Jałoszyński & Peris (2016).[4]
Description[edit]
The beetle is small, only 0.6 millimetres (0.024 in) long, possessing a light brown body with yellowish brown legs, antennae, and head.Kachinushas a unique combination of characters found in both theCephenniniandEutheiinitribes of theScydmaeninaesupertribeScydmaenitae.[2]Elytraandpronotumwhich are not clearly discontinuous and a head which does not have a narrowed area from the vertex to theocciputare features found in the modern Cephennini genera. However the overall pronotum shape and body shape combined with shortenedelytraare distinct features of Eutheiini. It is noted that with the distinctly elevatedmesosternalkeelKachinusis similar in appearance to the modern genusParaneseuthia.[2]
References[edit]
- ^Engel, M.S. (2002)."The Smallest Snakefly(Raphidioptera: Mesoraphidiidae): A New Species in Cretaceous Amber from Myanmar, with a Catalog of Fossil Snakeflies".American Museum Novitates(3363): 1–22.doi:10.1206/0003-0082(2002)363<0001:TSSRMA>2.0.CO;2.hdl:2246/2852.S2CID83616111.
- ^abcdefStylianos Chatzimanolis; Michael S. Engel; Alfred F. Newton; David A. Grimaldi (2010). "New ant-like stone beetles in mid-Cretaceous amber from Myanmar (Coleoptera:Staphylinidae: Scydmaeninae)".Cretaceous Research.31(1): 77–84.doi:10.1016/j.cretres.2009.09.009.
- ^David Peris, Stylianos Chatzimanolis and Xavier Delclòs (2014). "Diversity of rove beetles (Coleoptera: Staphylinidae) in Early Cretaceous Spanish amber".Cretaceous Research.48:85–95.doi:10.1016/j.cretres.2013.11.008.
- ^Paweł Jałoszyński and David Peris (2016). "Cretaceous amber inclusions of Spain and Myanmar demonstrate early diversification and wide dispersal of Cephenniitae (Coleoptera: Staphylinidae: Scydmaeninae)".Cretaceous Research.57:190–198.doi:10.1016/j.cretres.2015.09.002.