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Brachyopomorpha is a clade of stereospondyl temnospondyls within the infraorder Trematosauria. It was constructed in 2000 to include ''Bothriceps australis'' and the superfamily Brachyopoidea. It is phylogenetically defined as a stem-based taxon including ''Pelorocephalus'' and all taxa closer to it than to ''Rhytidosteus''. In contrast, Brachyopoidea is defined as a node-based taxon including ''Brachyops'' and ''Pelorocephalus'' and all descendants of their most recent common ancestor. Because ''Bothriceps'' is not thought to be a descendant of that recent common ancestor and would be more basal than it, the genus is placed just outside Brachyopoidea and is considered to be a sister taxon to the clade.〔 }} }} ''Bothriceps'' was once considered to be a brachyopid within Brachyopoidea, but is now placed on the brachyopoid stem closer to Brachyopoidea than to Rhytidosteidae due to the presence of several plesiomorphies (ancestral characters). The probable presence of a tabular horn in ''Bothriceps'' also suggests that it is a basal brachyopomorph rather than a brachyopid.〔 ''Keratobrachyops'', once assigned to Chigutisauridae, is now thought to be a basal brachyopomorph closely related to ''Bothriceps''.〔 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Brachyopomorpha」の詳細全文を読む スポンサード リンク
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