TAXONOMIC REVISION AND NEW OBSERVATIONS ON THE POSTCRANIAL SKELETON, BIOGEOGRAPHY, AND BIOSTRATIGRAPHY OF THE DICYNODONT GENUS DICYNODONTOIDES, THE SENIOR SUBJECTIVE SYNONYM OF KINGORIA (THERAPSIDA, ANOMODONTIA)
TAXONOMIC REVISION AND NEW OBSERVATIONS ON THE POSTCRANIAL SKELETON, BIOGEOGRAPHY, AND BIOSTRATIGRAPHY OF THE DICYNODONT GENUS DICYNODONTOIDES, THE SENIOR SUBJECTIVE SYNONYM OF KINGORIA (THERAPSIDA, ANOMODONTIA)
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DOI：
10.1671/039.029.0427
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发表时间：
2009-12-12
影响因子：
1.4
通讯作者：
Tsuji, Linda A.
中科院分区：
文献类型：
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作者：
Angielczyk, Kenneth D.;Sidor, Christian A.;Tsuji, Linda A.
金奥里亚的颅后骨骼被描述得很好，以前的作者注意到该分类群的不同的胸部，骨盆和股骨形态。然而，由于保存不善和缺乏公开的描述，金奥里亚的肱骨形态仍然是个谜。在这里，我们描述了新的，几乎完整的肱骨Kingoria上二叠统Usili组，Ruhuhu盆地，坦桑尼亚。这些标本表明，肱骨形态K。nowacki比它的骨盆或股骨保守得多。有证据表明，增加的重要性，肱骨长轴旋转K。nowacki，trophila和capitellum部分分离，但这些形态并没有采取在cistecephalid双齿兽中观察到的极端。令人惊讶的是，新的坦桑尼亚肱骨与南非标本不同：保存最好的南非标本更纤细，具有不同的肱骨头和三角胸嵴形态。我们利用这些差异，沿着新的观察头骨形态，长牙的频率，骨盆和腓骨形态，身体大小，修订Kingoria的分类。Kingoria是Dicynodontoides Broom，1940的初级异名，并确认了两个种：Dicynodontoides Broom，1940. recurvidens和D.来自坦桑尼亚的nowacki最后，我们回顾了Dicynodontoides的地层和地理范围，并记录了新出现的Pristernathus和Tropidostoma组合区的卡鲁盆地，以及它的存在在马拉维的Chiweta床。
The postcranial skeleton of Kingoria is well-described, and previous authors noted the taxon's divergent pectoral, pelvic, and femoral morphologies. Yet, humeral morphology of Kingoria has remained enigmatic because of poor preservation and the absence of published descriptions. Here we describe new, nearly complete humeri of Kingoria collected from the Upper Permian Usili Formation, Ruhuhu Basin, Tanzania. These specimens demonstrate that the humeral morphology of K. nowacki is much more conservative than that of its pelvis or femur. There is evidence of increased importance for long-axis rotation of the humerus in K. nowacki, and the trochlea and the capitellum are partially separated, but these morphologies are not taken to the extremes observed in cistecephalid dicynodonts. Surprisingly, the new Tanzanian humeri differ from South African specimens: the best-preserved South African specimen is more gracile, with different humeral head and deltopectoral crest morphologies. We use these differences, along with new observations on skull morphology, tusk frequency, pelvic and fibular morphology, and body size to revise the taxonomy of Kingoria. Kingoria is shown to be a junior synonym of Dicynodontoides Broom, 1940, and two species are recognized: D. recurvidens from South Africa and D. nowacki from Tanzania. Finally, we review the stratigraphic and geographic ranges of Dicynodontoides, and document new occurrences in the Pristerognathus and Tropidostoma assemblage zones of the Karoo Basin, as well as its presence in the Chiweta Beds of Malawi.