Proetmopterus lukasi
Feichtinger, Pollerspöck, Harzhauser, Auer, Ćorić, Kranner & Guinot, 2022
Classification: Elasmobranchii Squaliformes Etmopteridae
Reference of the original description
Shifts in composition of northern Tethyan elasmobranch assemblages during the last millennia of the Cretaceous. Cretaceous Research, 142, Article 105414
Shifts in composition of northern Tethyan elasmobranch assemblages during the last millennia of the Cretaceous. Cretaceous Research, 142, Article 105414
Types
Proetmopterus lukasi
Proetmopterus lukasi
Description:
Citation: Proetmopterus lukasi Feichtinger, Pollerspöck, Harzhauser, Auer, Ćorić, Kranner & Guinot, 2022: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 04/2024
Description
Original diagnose after Feichtinger et al. (2022) [31181]: Small teeth with a pronounced dignathic heterodonty not exceeding a mesio-distal width of 1 mm. Cuspidate upper jaw teeth with one main cusp and a pair of high and slender lateral cusplets. Lingual face of all cusps convex, labial face flat. Strong lingual root bulge with a central foramen, crown base of labial face convex with numerous small foramina following the contour of the crown base. One medio-lingual foramen situated below the lingual bulge. Root squared but separated by a notch basally. Lower jaw teeth moncuspid with main cusp strongly bent distally. Mesial cutting edge not serrated and straight, but with rounded mesial crown margin. Distal cutting edge of main cusp straight to slightly convex,continuing on distal heel. Lingual root face with bulge and central foramen and a pair of margino-lingual foramina occurs. Squared root with a medio-lingual foramen and a nutritive groove, splitting the root base. Small tooth interlocking surface developed lingually. Labial crown face with broad apron extending basally, large foramina present following the basal crown edge.
Original diagnose after Feichtinger et al. (2022) [31181]: Small teeth with a pronounced dignathic heterodonty not exceeding a mesio-distal width of 1 mm. Cuspidate upper jaw teeth with one main cusp and a pair of high and slender lateral cusplets. Lingual face of all cusps convex, labial face flat. Strong lingual root bulge with a central foramen, crown base of labial face convex with numerous small foramina following the contour of the crown base. One medio-lingual foramen situated below the lingual bulge. Root squared but separated by a notch basally. Lower jaw teeth moncuspid with main cusp strongly bent distally. Mesial cutting edge not serrated and straight, but with rounded mesial crown margin. Distal cutting edge of main cusp straight to slightly convex,continuing on distal heel. Lingual root face with bulge and central foramen and a pair of margino-lingual foramina occurs. Squared root with a medio-lingual foramen and a nutritive groove, splitting the root base. Small tooth interlocking surface developed lingually. Labial crown face with broad apron extending basally, large foramina present following the basal crown edge.
References
Shifts in composition of northern Tethyan elasmobranch assemblages during the last millennia of the Cretaceous. Cretaceous Research, 142, Article 105414
DOI: 10.1016/j.cretres.2022.105414
Shifts in composition of northern Tethyan elasmobranch assemblages during the last millennia of the Cretaceous. Cretaceous Research, 142, Article 105414
DOI: 10.1016/j.cretres.2022.105414
