晚密西西比世 Fayetteville 页岩的 Cosmoselachus mehlingi 部分正模 AMNH FF 20509 保存来自舌弓和鳃弓、融合成波纹状鳃盖并覆盖至少两个后部鳃弓的长辐条。
claim:event:late-mississippian-cosmoselachus-operculumCosmoselachus 揭示具鳃盖的对称鳍鲨形软骨鱼
CT reconstruction of the partial holotype AMNH FF 20509 documents elongate fused branchial rays forming a corrugated operculate structure over posterior gill arches, adding a bounded Carboniferous body-plan sample to the early chondrichthyan record.
呈现年代范围326–326 Ma
地区Fayetteville Shale near Cove Creek, Searcy County, Arkansas, United States
相关类群Cosmoselachus mehlingi · Falcatidae · Symmoriiformes
主张账本
参考文献
- A new operculate symmoriiform chondrichthyan from the Late Mississippian Fayetteville Shale (Arkansas, United States)Bronson, A.W.; Pradel, A.; Denton, J.S.S.; Maisey, J.G. · 2024 · DOI 10.5252/geodiversitas2024v46a4