Squalicorax lalunaensis
Guinot & Carrillo-Briceño, 2018
Classification: Elasmobranchii Lamniformes Anacoracidae
Reference of the original description
Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela. Cretaceous Research, 82, 1–20
Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela. Cretaceous Research, 82, 1–20
Synonyms / new combinations and misspellings
Squalicorax aff. lalunaensis
Squalicorax aff. lalunaensis
Description:
Citation: Squalicorax lalunaensis Guinot & Carrillo-Briceño, 2018: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
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Description
Original diagnosis after Guinot & Carrillo-Briceño, 2018 [25801]: Anacoracid shark with small teeth (less than 9mm high) showing moderate degree of gradient monognathic and possibly dignathic heterodonty. Main cusp biconvex and triangular with narrow apical region; main cusp moderately to strongly inclined to the commissure with convex mesial cutting edge. Mesial heel elongate and well separated from main cusp in lateral teeth. Distal heel convex and individualized from main cusp by marked notch. Moderately developed basal bulge at base of labial crown face; basal bulge restricted to median region of crown in anteriors and laterals, extended to marginal crown edges in posteriors. Cutting edges of heels and main cusp sharp and well developed, devoid of serrations. Lingual neck of moderate and sub-equal width from mesial to distal edges. Root bilobate; mesial root lobe thin and elongate; distal lobe short with blunt extremity, nearly squared in laterals and posteriors. Lingual root face short and convex in profile view. Marginal edges of root concave in labial/lingual views. Basal root face flat except in anteriors. Labial root face with foramina of variable shape below basal crown bulge.
Original diagnosis after Guinot & Carrillo-Briceño, 2018 [25801]: Anacoracid shark with small teeth (less than 9mm high) showing moderate degree of gradient monognathic and possibly dignathic heterodonty. Main cusp biconvex and triangular with narrow apical region; main cusp moderately to strongly inclined to the commissure with convex mesial cutting edge. Mesial heel elongate and well separated from main cusp in lateral teeth. Distal heel convex and individualized from main cusp by marked notch. Moderately developed basal bulge at base of labial crown face; basal bulge restricted to median region of crown in anteriors and laterals, extended to marginal crown edges in posteriors. Cutting edges of heels and main cusp sharp and well developed, devoid of serrations. Lingual neck of moderate and sub-equal width from mesial to distal edges. Root bilobate; mesial root lobe thin and elongate; distal lobe short with blunt extremity, nearly squared in laterals and posteriors. Lingual root face short and convex in profile view. Marginal edges of root concave in labial/lingual views. Basal root face flat except in anteriors. Labial root face with foramina of variable shape below basal crown bulge.
Remarks
shark-references Species-ID=14953;
shark-references Species-ID=14953;
References
Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela. Cretaceous Research, 82, 1–20
DOI: 10.1016/j.cretres.2017.09.021
Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela. Cretaceous Research, 82, 1–20
DOI: 10.1016/j.cretres.2017.09.021

Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela. Cretaceous Research, 82, 1–20
DOI: 10.1016/j.cretres.2017.09.021

Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela. Cretaceous Research, 82, 1–20
DOI: 10.1016/j.cretres.2017.09.021







