First Fossil Hagfish (Myxinoidea): A Record from the Pennsylvanian of Illinois
First Fossil Hagfish (Myxinoidea): A Record from the Pennsylvanian of Illinois
复制标题
第一个盲鳗化石（Myxinoidea）：来自伊利诺伊州宾夕法尼亚州的记录
作者：
D. Bardack
一只盲鳗化石（盲鳗总科），来自宾夕法尼亚的一个新属，展示了触须、头部骨骼结构和内部器官。这一类群的其他化石没有被报道过。虽然这种新的盲鳗在鳃的位置、摄食器官和相对发达的眼睛上与现存的盲鳗不同，但它与它最近的亲戚非常相似。因此，盲鳗有着悠久而保守的地质历史。显示黏液类是脊椎动物的姐妹类群的进化图得到了支持。
A fossil hagfish (Myxinoidea), a new genus from the Pennsylvanian, shows tentacles, structures of the head skeleton and internal organs. No other fossils of this group have been reported. Although this new hagfish differs from living forms in position of the gills, feeding apparatus, and relatively well developed eyes, it is quite similar to its recent relatives. Thus, hagfishes have a long, conservative geological history. Cladograms showing myxinoids as a sister group to the vertebrates are supported.