A New Genus of Pennsylvania Fish (Crossoperygii, Coelacanthiformes) from Kansas by Joan Echols

A New Genus of Pennsylvania Fish (Crossoperygii, Coelacanthiformes) from Kansas

By Joan Echols

  • Publication Date: 2010-08-28
  • Genre: Nature

Book Summary

Members of this subfamily differ from those of the subfamily Diplocercinae in having several paired and unpaired elements in the sphenethmoid region of the endocranium, instead of only one larger ossification. They differ from those of the suborder Coelacanthoidei in the retention of basipterygoid processes. Synaptotylus is more closely related to Rhabdoderma than to the Diplocercines because the anterior portion of the endocranium contains only a basisphenoid, parasphenoid, and probably ethmoids. The sphenethmoid region was certainly not a large, unpaired unit as in the Diplocercines.

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