Protoxynotus cf. mayrmelnhofi
Feichtinger, Guinot, Straube, Harzhauser, Auer, Ćorić, Kranner, Schellhorn, Ladwig, Thies & Pollerspöck, 2022
Classification: Elasmobranchii Squaliformes Somniosidae
Reference of the original description
Revision of the Cretaceous shark Protoxynotus (Chondrichthyes, Squaliformes) and early evolution of somniosid sharks. Cretaceous Research, 140, Article 105331
Revision of the Cretaceous shark Protoxynotus (Chondrichthyes, Squaliformes) and early evolution of somniosid sharks. Cretaceous Research, 140, Article 105331
Types
Protoxynotus cf. mayrmelnhofi
Protoxynotus cf. mayrmelnhofi
Description:
Citation: Protoxynotus cf. mayrmelnhofi Feichtinger, Guinot, Straube, Harzhauser, Auer, Ćorić, Kranner, Schellhorn, Ladwig, Thies & Pollerspöck, 2022: 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 Feichtinger et al. (2022) [30999]: Labio-lingually compressed, asymmetrical but delicate teeth not exceeding a height of 1.8 mm and a width of 0.5 mm. Teardrop-shaped and smooth cusp flanked by a well-rounded distal heel. Broad extension (sinuosity) of enameloid towards the base on lingual face with basally adjacent pronounced bulge, exhibiting one medio-lingual foramen and a central foramen. Nutritive groove on basal face running from the labial root edge to the central foramen. A pair of margino-lingual foramina is present on the edges of the lingual bulge, slightly higher than the medio-lingual foramen. Labial crown possesses a long apron, bordered laterally by several margino-labial foramina.
Original diagnosis after Feichtinger et al. (2022) [30999]: Labio-lingually compressed, asymmetrical but delicate teeth not exceeding a height of 1.8 mm and a width of 0.5 mm. Teardrop-shaped and smooth cusp flanked by a well-rounded distal heel. Broad extension (sinuosity) of enameloid towards the base on lingual face with basally adjacent pronounced bulge, exhibiting one medio-lingual foramen and a central foramen. Nutritive groove on basal face running from the labial root edge to the central foramen. A pair of margino-lingual foramina is present on the edges of the lingual bulge, slightly higher than the medio-lingual foramen. Labial crown possesses a long apron, bordered laterally by several margino-labial foramina.
Remarks
shark-references Species-ID=17840
shark-references Species-ID=17840
References
Revealing elasmobranch diversity across the Cretaceous-Paleogene boundary in the Central Tethys (Byala, Bulgaria). Fossil Record, 29(1), 57–70
DOI: 10.3897/fr.29.182659
Revealing elasmobranch diversity across the Cretaceous-Paleogene boundary in the Central Tethys (Byala, Bulgaria). Fossil Record, 29(1), 57–70
DOI: 10.3897/fr.29.182659
