Hamiltonichthys updated
Today
more attention was paid to close-up skull photos of the Early Carboniferous shark, Hamiltonichthys (Fig 1, Maisey 1989, 27cm long), no larger than an extant salmon.
The new data did not change the original nesting of this shark in the LRT. It still nests with the primitive seven-gill shark, Chlamydoselachus.
References
Garman S 1884. An Extraordinary Shark. Bulletin of the Essex Institute: 47–55.
Grogan ED and Lund R 2008. A basal elasmobranch, Thrinacoselache gracia n. gen and sp., (Thrinacodontidae, new family) from the Bear Gulch Limestone, Serpukhovian of Montana, USA. Journal of Vertebrate Paleontology. 28 (4): 970–988.
Maisey J 1989. Hamiltonichthys mapesi, g. & sp. nov. (Chondrichthyes; Elasmobranchii), from the Upper Pennsylvanian of Kansas. American Museum Novitates 2931:42pp.
wiki/Frilled_shark
wiki/Thrinacoselache
wiki/Hamiltonichthys – not yet posted
Source: https://pterosaurheresies.wordpress.com/2024/01/29/hamiltonichthys-updated/
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