Abstract
The fossil ship-timber beetle, Adamas hukawngensis gen. et sp.n., is described and defined based on one well preserved specimen in mid-Cretaceous amber from the Hukawng Valley in Northern Myanmar. The new species can be readily distinguished from all other extinct and recent members of the family due to the presence of a lozenge-shaped scutellum with a meso-longitudinal groove. Modifications of lymexylid metathoracic wing venation and palaeobiomigratory significance are briefly discussed.
References
Chen, X.Y. (2019) A New Genus and Species of Lymexylidae (Insecta: Coleoptera) from Mid-Cretaceous Amber of Northern Myanmar. Paleontological Journal, 53 (11), 1203–1205.
https://doi.org/10.1134/S003103011911008X
Cruickshank, R.D. & Ko, K. (2003) Geology of an amber locality in the Hukawng Valley, northern Myanmar. Journal of Asian Earth Sciences, 21 (5), 441–455.
https://doi.org/10.1016/S1367-9120(02)00044-5
Grimaldi, D.A. & Engel, M.S. (2005) Evolution of the Insects. Cambridge University Press, Cambridge, 755 pp.
Grimaldi, D.A., Engel, M.S. & Nascimbene, P.C. (2002) Fossiliferous cretaceous amber from Myanmar (Burma): its rediscovery, biotic diversity, and paleontological significance. American Museum Novitates, 3361 (3361), 1–71.
https://doi.org/10.1206/0003-0082(2002)361%3C0001:FCAFMB%3E2.0.CO;2
Kirejtshuk, A.G. (2008) A new genus and species of timber beetle (Coleoptera: Lymexylidae) from the baltic amber. Paleontological Journal, 42 (1), 63–65.
Latreille, P.A. (1806) Genera Crustaceorum et insectorum, secundum ordinem naturalem in familias disposita, iconibus exemplisque plurimis explicate. Vol. 1. A. Koenig, Paris, 302 pp.
https://doi.org/10.5962/bhl.title.5093
Ponomarenko, A.G. & Kirejtshuk, A.G. (2007) Systematic list of fossil beetles of the Suborder Scarabaeina: 3rd Part of the Catalogue. In: Beetles (Coleoptera) and Coleopterologists, July 2007. Available from: http://www.zin.ru/Animalia/Coleoptera/eng/paleosy2.htm (accessed 15 October 2020)
Schneider, D.H. (1791) Anmerkung des Herausgebers. Neues Magazin für die Liebhaber der Entomologie, 1, 109.
Shi, G., Grimaldi, D.A., Harlow, G.E., Wang, J., Wang, J., Yang, M., Lei, W., Li, Q. & Li, X. (2012) Age constraint on Burmese amber based on U-Pb dating of zircons. Cretaceous Research, 37 (2012), 155–163.
https://doi.org/10.1016/j.cretres.2012.03.014
Spahr, U. (1981) Systematischer Katalog der Bernstein- und Kopal-Kafer (Coleoptera). Stuttgarter Beitrage zur Naturkunde, Serie B (Geologie und Palaontologie), No 80, 1–107. [in German]
Wheeler, Q.D. (1986) Revision of the Genera of Lymexylidae (Coleoptera: Cucujiformia). Bulletin of the American Museum of Natural History, 183 (183), 113–210.
Wolf-Schwenninger, K. (2011) The oldest fossil record of Lymexylidae (Insecta: Coleoptera) from the Lower Cretaceous Crato formation of Brazil. Insect Systematics & Evolution, 42 (2), 205–212.
https://doi.org/10.1163/187631211X578352
Yin, Z.W., Cai, C.Y. & Huang, D.Y. (2018) Last major gap in scydmaenine evolution filled (Coleoptera:Staphylinidae). Cretaceous Research, 84 (2018), 62–68.
https://doi.org/10.1016/j.cretres.2017.10.026