caa a22 4500 388016922 CHVBK 20200822102726.0 cr unu---uuuuu 161130e199807 xx s 000 0 eng 10.1017/S0022336000040440 doi S0022336000040440 pii (NATIONALLICENCE)cambridge-10.1017/S0022336000040440 Hyaenodon venturae (Hyaenodontidae, Creodonta, Mammalia) from the Early Chadronian (Latest Eocene) of Wyoming [Elektronische Daten] [Alexander V. Lavrov, Robert J. Emry] Two new specimens of Hyaenodon venturae from the early Chadronian (latest Eocene) of Wyoming provide new information about this rare, miniature hyaenodont, and extend the upper end of the temporal range of the species. The significant difference between H. venturae and H. microdon, the two smallest North American species of Hyaenodon, is the absence of synostosis of the mandibular symphysis in adult H. venturae. In Hyaenodon microdon, from the middle Chadronian, on the contrary, fusion of the symphysis is complete while the individual is still in the juvenile stage of ontogenesis, before the eruption of m3. Within the genus Hyaenodon the ml becomes relatively smaller as the length of the tooth row (pl-m3) increases; this relationship can be demonstrated in the series of species from the miniature H. venturae to the giant H. megaloides. Copyright © The Paleontological Society Lavrov Alexander V. Laboratory of Mammals, Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya 123, Moscow 117647, Russia aut Emry Robert J. Department of Paleobiology, National Museum of Natural History, Washington, D.C. 20560 aut Journal of Paleontology Cambridge University Press 72/4(1998-07), 752-757 0022-3360 72:4<752 1998 72 JPA https://doi.org/10.1017/S0022336000040440 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-cambridge NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022336000040440 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lavrov Alexander V. Laboratory of Mammals, Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya 123, Moscow 117647, Russia aut NATIONALLICENCE 700 1- Emry Robert J. Department of Paleobiology, National Museum of Natural History, Washington, D.C. 20560 aut NATIONALLICENCE 773 0- Journal of Paleontology Cambridge University Press 72/4(1998-07), 752-757 0022-3360 72:4<752 1998 72 JPA SWISSBIB 388016922