“Valenictus”的意思、由来-开放百科全书

词条

Valenictus

释义

Description
Sources
External links

{{Italic title}}{{Taxobox
| name = Valenictus
| fossil_range = Pliocene
| image =
| image_caption =
| regnum = Animalia
| phylum = Chordata
| classis = Mammalia
| ordo = Carnivora
| subordo = Caniformia
| superfamilia = Pinnipedia
| familia = Odobenidae
| genus = †Valenictus
| genus_authority = Mitchell, 1961
| subdivision_ranks = Species
| subdivision =

†V. chulavistensis

†V. imperialensis

}}

Valenictus is an extinct genus of Odobenidae from the Pliocene of California.

Description

Valenictus is related to the modern-day walrus, but lacked all teeth both in the lower and upper jaw except for the two tusks.

Sources

Evolution: What the Fossils Say and Why It Matters by Donald R. Prothero and Carl Buell
Marine Mammal Biology: An Evolutionary Approach by A. Rus Hoelzel
Marine Mammals: Evolutionary Biology by Annalisa Berta, James L. Sumich, and Kit M. Kovacs
Encyclopedia of Marine Mammals by William F. Perrin, Bernd Wursig, and J. G.M. Thewissen
Classification of Mammals by Malcolm C. McKenna and Susan K. Bell
Neptune's Ark: From Ichthyosaurs to Orcas by David Rains Wallace
Evolution of Tertiary Mammals of North America: Volume 2, Small Mammals, Xenarthrans, and Marine Mammals by Christine M. Janis, Gregg F. Gunnell, and Mark D. Uhen

External links

SDNHM Fossil Mysteries Field Guide: Chula Vista Walrus
SDNHM: Recent Paleo Finds - Walrus Fall 2001

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。