Gladioserratus dentatus

GUINOT, CAPPETTA & ADNET, 2014


Classification: Elasmobranchii Hexanchiformes Hexanchidae

Reference of the original description
GUINOT, G. & CAPPETTA, H. & ADNET, S. (2014)
A rare elasmobranch assemblage from the Valanginian (Lower Cretaceous) of southern France. Cretaceous Research, 48: 54–84

Types
Gladioserratus dentatus
Holotype: USTL: VAL-80;


Description:


Citation: Gladioserratus dentatus GUINOT, CAPPETTA & ADNET, 2014: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

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Description
Original diagnose after Guinot et al. (2014) p. 59 [20107]: Hexanchid teeth with gradient monognathic and marked dignathic heterodonty. Lower symphyseal and upper parasymphyseal teeth present. Upper teeth with erect and distally inclined acrocone and up to two distal conules oriented distally (no conules in parasymphyseals). Mesial serrations of up to two short and distally oriented cusplets, absent in parasymphyseal and anterior-most teeth. Bulky triangular root in basal view with depressed labial face and marked labial concavity in lateral teeth. Lower teeth labio-lingually compressed and mesio-distally elongate. Distally inclined triangular acrocone and accessory conules (up to four) of gradually decreasing size distally. Mesial serrations made of generally four distally curved conules. High root with flat basal face and sub-triangular basal outline. Vertical mesial root edge with occasional concavity near the crown. Root thinner distally with corresponding labial convexity. Reduced lingual root face with depressed margino-lingual faces and numerous foramina. Flat labial root face with many foramen openings and corresponding grooves.

Remarks
valid after Guinot et al. (2014) p. 59 [20107];

References
GUINOT, G. & CAPPETTA, H. & ADNET, S. (2014)
A rare elasmobranch assemblage from the Valanginian (Lower Cretaceous) of southern France. Cretaceous Research, 48: 54–84
DOI: 10.1016/j.cretres.2013.11.014