Guffaw
发表于 2025-3-21 17:47:12
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缺陷
发表于 2025-3-21 23:38:29
,The Tree-Shrew, , A “Living Model” of the Ancestral Primate?,tral primate morphotype. Perhaps surprisingly, this viewpoint is not confined to the diminishing number of systematists and others who would admit the tree-shrews to membership in the order Primates. Hence it may be useful to evaluate the claims of the tree-shrews to living fossil status of this kind.
anarchist
发表于 2025-3-22 04:09:12
Evolutionary Pattern and Process in the Sister-Group Alcelaphini-Aepycerotini (Mammalia: Bovidae),record plus extant survivors, and that are still in a phase of evolutionary radiation (Vrba 1980a). The bovid tribes Alcelaphini (blesbuck—hartebeest—wilde—beest group) and Aepycerotini (impalas) provide such a case.
cogent
发表于 2025-3-22 06:27:07
Tragulids as Living Fossils,ified within the infraorder Tragulina in the suborder Ruminantia (see Fig. 2). The sister-group to the Tragulina is the infraorder Pecora, which in the present day represents the most numerous, diverse, and geographically widespread group of ungulate mammals.
形上升才刺激
发表于 2025-3-22 09:37:26
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确保
发表于 2025-3-22 14:15:27
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无礼回复
发表于 2025-3-22 19:57:05
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疏远天际
发表于 2025-3-23 00:39:45
Family Lepisosteida (Gars) as Living Fossils, elongation and is correlated with many of the synapomorphies characterizing the family (Wiley 1976). Plicidentine teeth and opistocoelous vertebrae are also synapomorphies (Patterson 1973). The remaining characters are retained plesiomorphies.
dyspareunia
发表于 2025-3-23 04:36:54
Living Fossils: Introduction to the Casebook,rocess. All are historical entities—these particular genes, allelic frequencies, species, and phyla. And all that we think we know about them constitutes not so much raw data or observation as detailed hypotheses.
guardianship
发表于 2025-3-23 08:50:24
What is a Tarsier?,ost closely related to the generally Paleocene “archaic” plesiadapiform primates because of common possession of an enlarged anterior tooth (only in the upper jaw of .); this group is the sister of all other primates (Gingerich 1975; Schwartz 1978a).