Strophodus atlasensis
Stumpf, Kettler, Kindlimann, Cuny & Kriwet, 2023
Classification: Elasmobranchii Hybodontiformes Acrodontidae
Reference of the original description
The oldest Gondwanan record of the extinct durophagous hybodontiform chondrichthyan, Strophodus from the Bajocian of Morocco. Swiss Journal of Palaeontology, 142, Article 5
The oldest Gondwanan record of the extinct durophagous hybodontiform chondrichthyan, Strophodus from the Bajocian of Morocco. Swiss Journal of Palaeontology, 142, Article 5
Description:
Citation: Strophodus atlasensis Stumpf, Kettler, Kindlimann, Cuny & Kriwet, 2023: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 09/2026
Description
Original diagnosis after Stumpf, Kettler, Kindlimann, Cuny & Kriwet, 2023 [31825]: A species of Strophodus that is characterized by the following unique combination of dental characters: Presence of a well-developed, heterodont crushing-type dentition; teeth of first lateral file short mesio-distally and slightly domed in labio-lingual view, with a nearly triangular occlusal outline; tooth crowns of first lateral teeth without transverse occlusal crest, but covered with a finely reticulate pattern; teeth of the second lateral file wide mesio-distally and bulbous without a dome in labio-lingual view, displaying a subrectangular occlusal outline with a slightly concave labial and a gently convex lingual edge; tooth crowns of second lateral teeth without transverse occlusal crest and covered with a finely reticulate pattern that turns into labiolingually aligned bands along the lingual part of the crown; teeth of first posterior file shorter mesio-distally than labio-lingually long and elliptical in occlusal outline; tooth crowns of first posterior teeth slightly elevated and ornamented with a finely reticulate pattern; tooth crowns of second posterior teeth small and oval in occlusal outline with their long axes oriented obliquely, exhibiting a finely reticulate ornamentation pattern; tooth roots of second posterior teeth parallelogram- shaped in occlusal outline and protrude distally and slightly labio-lingually below the crown, meeting each other in an efficient interlocking manner.
Original diagnosis after Stumpf, Kettler, Kindlimann, Cuny & Kriwet, 2023 [31825]: A species of Strophodus that is characterized by the following unique combination of dental characters: Presence of a well-developed, heterodont crushing-type dentition; teeth of first lateral file short mesio-distally and slightly domed in labio-lingual view, with a nearly triangular occlusal outline; tooth crowns of first lateral teeth without transverse occlusal crest, but covered with a finely reticulate pattern; teeth of the second lateral file wide mesio-distally and bulbous without a dome in labio-lingual view, displaying a subrectangular occlusal outline with a slightly concave labial and a gently convex lingual edge; tooth crowns of second lateral teeth without transverse occlusal crest and covered with a finely reticulate pattern that turns into labiolingually aligned bands along the lingual part of the crown; teeth of first posterior file shorter mesio-distally than labio-lingually long and elliptical in occlusal outline; tooth crowns of first posterior teeth slightly elevated and ornamented with a finely reticulate pattern; tooth crowns of second posterior teeth small and oval in occlusal outline with their long axes oriented obliquely, exhibiting a finely reticulate ornamentation pattern; tooth roots of second posterior teeth parallelogram- shaped in occlusal outline and protrude distally and slightly labio-lingually below the crown, meeting each other in an efficient interlocking manner.
References
The oldest Gondwanan record of durophagous shark Strophodus Agassiz, 1838 (Hybodontiformes) from the Kachchh Basin, western India. Historical Biology, 7(3), 650–662
DOI: 10.1080/08912963.2024.2324430
The oldest Gondwanan record of the extinct durophagous hybodontiform chondrichthyan, Strophodus from the Bajocian of Morocco. Swiss Journal of Palaeontology, 142, Article 5
DOI: 10.1186/s13358-023-00270-w

The oldest Gondwanan record of durophagous shark Strophodus Agassiz, 1838 (Hybodontiformes) from the Kachchh Basin, western India. Historical Biology, 7(3), 650–662
DOI: 10.1080/08912963.2024.2324430
The oldest Gondwanan record of the extinct durophagous hybodontiform chondrichthyan, Strophodus from the Bajocian of Morocco. Swiss Journal of Palaeontology, 142, Article 5
DOI: 10.1186/s13358-023-00270-w








