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首页> 外文期刊>Journal of Asian earth sciences >A new genus of Pergamidiidae (Bivalvia) from the Late Triassic of the Changtai-Gacun area, eastern Qinghai-Xizang Plateau, China
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A new genus of Pergamidiidae (Bivalvia) from the Late Triassic of the Changtai-Gacun area, eastern Qinghai-Xizang Plateau, China

机译:青藏高原东部长泰-加村地区晚三叠世的一种新的柏木科(双壳纲)

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摘要

The new epi-byssate bivalve Parapergamidia changtaiensis gen. et sp. nov. of the family Pergamidiidae occurs in the Upper Triassic (? Late Carnian-Early Norian) Tumugou Formation of the Changtai-Gacun area, eastern Qinghai-Xizang Plateau, China. During the Late Triassic, this area was an intra-arc rift of the Yidun Island Arc along the eastern margin of the Tethyan seaway. The new taxon has a big byssal gape, prominent byssal retractor muscle scars, and anteriorly oblique and posteriorly to posteroventrally elongated shape. The thin shell is distinctly longer than high.
机译:新型落地式双壳类长白Para(Papergamidia changtaiensis)gen。等。十一月gam虫科的一例发生在中国东部青藏高原长泰-加村地区的上三叠世(?晚卡尼期-早诺期)土木沟组。在三叠纪晚期,该地区是沿特提斯海峡东缘的伊敦岛弧的弧内裂谷。新的分类单元具有较大的舌侧间隙,明显的舌侧牵开器肌肉疤痕,且前斜后方为后腹延长型。薄壳明显长于高壳。

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