| 词条 | Adelobasileus |
| 释义 |
| name = Adelobasileus | fossil_range = Late Triassic, {{fossil range|225}} | image = Adelobasileus cromptoni.jpg | genus = Adelobasileus | species = cromptoni | authority = {{Harvnb|Lucas|Hunt|1990}} }} Adelobasileus cromptoni is a species of an extinct genus of mammal-like synapsid from the Late Triassic (Carnian), about 225 million years ago. It is known only from a partial skull recovered from the Tecovas formation in western Texas, southern United States. Roughly contemporary with the mammaliaform Tikitherium, Adelobasileus predates the non-mammalian cynodonts Tritylodontidae and Tritheledontidae by 10 million years. In fact, distinct cranial features, especially the housing of the cochlea, suggest that Adelobasileus is a transitional form in the character transformation from cynodonts to Triassic mammals. For this reason, it is thought to be the common ancestor of all modern mammals or a close relative of the common ancestor. Though traditionally classified as a mammal by trait-based taxonomy, it is outside the crown group containing all true mammals.[1] References1. ^{{cite journal |last1=Rowe |first1=T. S. |year=1988 |title=Definition, diagnosis, and origin of Mammalia |journal=Journal of Vertebrate Paleontology |volume=8 |issue=3 |pages=241–264 |url=http://www.geo.utexas.edu/faculty/rowe/Publications/pdf/010%20Rowe%201988.pdf |doi=10.1080/02724634.1988.10011708}}
| last1 = Lucas | first1 = SG | author1-link = Spencer G. Lucas | last2 = Hunt | first2 = AP | year = 1990 | title = The oldest mammal | journal = New Mexico Journal of Science | volume = 30 | issue = 1 | pages = 41–49 | ref = harv}}
| last1 = Lucas | first1 = SG | last2 = Luo | first2 = Z | title = Adelobasileus from the upper Triassic of west Texas: the oldest mammal | journal = J. Vert. Paleontol. |date=September 1993 | volume = 13 | issue = 3 | pages = 309–334 | doi = 10.1080/02724634.1993.10011512}} External links{{Portal|Paleontology}}
4 : Mammaliaformes|Triassic mammals|Triassic synapsids of North America|Cynodont genera |
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