Protoxynotus 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 mayrmelnhofi
Holotype: NHMW: 2021/0116/0001; Paratype: NHMW: 2021/0116/0001; NHMW: 2021/0116/0001;
Protoxynotus mayrmelnhofi
Holotype: NHMW: 2021/0116/0001; Paratype: NHMW: 2021/0116/0001; NHMW: 2021/0116/0001;
Description:
Citation: Protoxynotus 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 12/2024
Please send your images of "Protoxynotus mayrmelnhofi" to info@shark-references.com
Protoxynotus mayrmelnhofi sp. nov. L-M Holotype (NHMW/2021/0116/0001), lower jaw: L lingual, M labial; N-O Paratype (NHMW/2021/0116/0002), lower jaw: N lingual, O labial; P-Q Paratype (NHMW/2021/0116/0003), lower jaw: P lingual, Q labial, Upper Maastrichtian, Waidach near Nussdorf, Austria. Scale bars equal 500 μm
Protoxynotus mayrmelnhofi sp. nov. L-M Holotype (NHMW/2021/0116/0001), lower jaw: L lingual, M labial; N-O Paratype (NHMW/2021/0116/0002), lower jaw: N lingual, O labial; P-Q Paratype (NHMW/2021/0116/0003), lower jaw: P lingual, Q labial, Upper Maastrichtian, Waidach near Nussdorf, Austria. Scale bars equal 500 μm
Description
Original diagnose 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 diagnose 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.
References
Haie und Rochen an der Kreide-Paläogen-Grenze. Fossilien, 3/2024, 48–57
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
Revision of the Cretaceous shark Protoxynotus (Chondrichthyes, Squaliformes) and early evolution of somniosid sharks. Cretaceous Research, 140, Article 105331
DOI: 10.1016/j.cretres.2022.105331
Haie und Rochen an der Kreide-Paläogen-Grenze. Fossilien, 3/2024, 48–57
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
Revision of the Cretaceous shark Protoxynotus (Chondrichthyes, Squaliformes) and early evolution of somniosid sharks. Cretaceous Research, 140, Article 105331
DOI: 10.1016/j.cretres.2022.105331
