词条 | Hapalodectidae |
释义 |
| name = | fossil_range = {{Fossil range|Late Paleocene|Late Eocene}} | image = Hapalodectes_serus.JPG | image_caption = Hapalodectes serus (bottom) | regnum = Animalia | phylum = Chordata | classis = Mammalia | ordo = †Mesonychia | familia = Hapalodectidae | familia_authority = (Szalay & Gould, 1966) | subdivision_ranks = Genera | subdivision =Hapalodectes Hapalorestes Metahapalodectes Lohoodon Honanodon }}Hapalodectidae (literally "soft biters": {{transl|grc|hapalos}} = "soft, tender", {{transl|grc|dêktês}} = "biter") is an extinct family of relatively small-bodied (1–8 kg)[1] mesonychian placental mammals from the Paleocene and Eocene of North America and Asia.[2] Hapalodectids differ from the larger and better-known mesonychids in having teeth specialized for cutting (presumably meat), while the teeth of other mesonychids, such as Mesonyx or Sinonyx, are more specialized for crushing bones.[1] Hapalodectids were once considered a subfamily of the Mesonychidae,[3] but the discovery of a skull of Hapalodectes hetangensis showed additional differences justifying placement in a distinct family.[4] In particular, H. hetangensis has a postorbital bar closing the back of the orbit,[4] a feature lacking in mesonychids. The skeleton of hapalodectids is poorly known and of the postcranial elements, only the humerus has been described. The morphology of this bone indicates less specialization for terrestrial locomotion than in mesonychids.[5] SpeciesFamily Hapalodectidae
References1. ^1 {{cite journal |author1=Gunnell, G.R. |author2=P.D. Gingerich | year = 1989 | title = New hapalodectid Hapalorestes lovei (Mammalia, Mesonychia) from the early middle Eocene of northwestern Wyoming | journal = Contributions from the Museum of Paleontology, The University of Michigan | volume = 29 | issue = 15 | pages = 413–418 | hdl = 2027.42/48636}} {{Taxonbar|from=Q941132}}{{paleo-mammal-stub}}2. ^{{cite book |author1=McKenna, M. C |author2=S. K. Bell | year = 1997 | title = Classification of Mammals Above the Species Level | publisher = Columbia University Press | isbn = 0-231-11012-X}} 3. ^{{cite journal |author1=Szalay, F.S. |author2=S.J. Gould | year = 1966 | title = Asiatic Mesonychidae (Mammalia, Condylarthra) | journal = Bulletin of the American Museum of Natural History | volume = 132 | issue = 2 | pages = 127–174 | hdl = 2246/1112}} 4. ^1 {{cite journal |author1=Ting, S. |author2=C. Li | year = 1987 | title = The skull of Hapalodectes (?Acreodi, Mammalia), with notes on some Chinese Paleocene mesonychids | journal = Vertebrata PalAsiatica | volume = 25 | issue = | pages = 161–186 | url = }} 5. ^{{cite journal | author = O'Leary, M.A. | year = 1998 | title = Morphology of the humerus of Hapalodectes (Mammalia, Mesonychia) | journal = American Museum Novitates | volume = 3242 | issue = | pages = 1–6 | hdl = 2246/3175}} 3 : Mesonychids|Eocene extinctions|Paleocene first appearances |
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