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Showing results for tags 'selachians'.
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Hey everyone, I don't have a lot of comparative material at hand, so I am asking for your help. I am working on a large shark fauna from the Cabezon area of New Mexico. The teeth are very beat up, possibly due to wave action on offshore sand bars. However, upon close inspection of the better teeth I have discovered that the serrations on the lingual side of the teeth contain indentations (or possible enable folding...see the photo). I have some squalicorax teeth from the Turonian, about 25 miles from this site, that were described in the New Mexico Museum of Natural History and Science Bulletin 52 (Bourdon, et. al., I was the tail end author) that also have these features. The closest we could identify these teeth were to slap a cf. or an aff. on them. Those of you who have identified to species squalicorax, could you check and see if they also have these lingual indentations or folds? Are these normal on all squalicorax species? Thank you!!! Randy Pence
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Most of members of this forum are interested in fossil sharks. But it is sometimes useful to compare these fossils with the recent jaws for understanding the various teeth of every species and their positions in the jaw (see this thread) I propose to put here your recent jaws of selachians, to obtain a good range of existing species actually. I begin with the largest shark family, the Carcharhinidae. They are difficult to identify because these species are very numerous and a lot of them have same lower teeth... As I shall make my photos, I shall integrate the new ones into this initial subject in the order of families. CARCHARHINIDAE Carcharhinus acronotus - Blacknose shark Carcharhinus altimus - Bignose shark Carcharhinus brevipinna - Spinner shark Carcharhinus falciformis - Silky shark Carcharhinus limbatus - Blacktip shark Carcharhinus macloti - Hardnose shark Thanks for your interest Coco
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- carcharhinidae
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