Acrorhizodus khoratensis
Cappetta, Buffetaut, Cuny & Suteethorn, 2006
Classification: Elasmobranchii Hybodontiformes Acrodontidae
Reference of the original description
A new elasmobranch assemblage from the Lower Cretaceous of Thailand. Palaeontology, 49(3), 547–555
A new elasmobranch assemblage from the Lower Cretaceous of Thailand. Palaeontology, 49(3), 547–555
Description:
Citation: Acrorhizodus khoratensis Cappetta, Buffetaut, Cuny & Suteethorn, 2006: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 09/2026
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Description
Original diagnosis after Cappetta, Buffetaut, Cuny & Suteethorn, 2006 [353]: As for genus: Genus characterized by small teeth (less than 8 mm in total height) having a high crown square or rectangular in shape, with a very convex labial margin, concave lingual margin and straight lateral margins in, occlusal view. A clear ridge parallel to the labial margin of the tooth in occlusal view divides the occlusal face into two areas, labial and lingual. From this ridge, on the labial area there are perpendicular folds reaching the margin, and on the lingual area there are labiolingually orientated folds.
The root is very developed, high, oblique and labiolingually flattened, with large foramina opening near its basal face. Its labial face is slightly convex, the lingual one slightly concave. The basal face is weakly developed labiolingually. In lateral teeth, the root is not as high and more oblique.
Original diagnosis after Cappetta, Buffetaut, Cuny & Suteethorn, 2006 [353]: As for genus: Genus characterized by small teeth (less than 8 mm in total height) having a high crown square or rectangular in shape, with a very convex labial margin, concave lingual margin and straight lateral margins in, occlusal view. A clear ridge parallel to the labial margin of the tooth in occlusal view divides the occlusal face into two areas, labial and lingual. From this ridge, on the labial area there are perpendicular folds reaching the margin, and on the lingual area there are labiolingually orientated folds.
The root is very developed, high, oblique and labiolingually flattened, with large foramina opening near its basal face. Its labial face is slightly convex, the lingual one slightly concave. The basal face is weakly developed labiolingually. In lateral teeth, the root is not as high and more oblique.
Remarks
shark-references Species-ID=80;
type species of Acrorhizodus Cappetta, Buffetaut, Cuny & Suteethorn, 2006 [353] by original designation (Art. 68.2 ICZN);
shark-references Species-ID=80;
type species of Acrorhizodus Cappetta, Buffetaut, Cuny & Suteethorn, 2006 [353] by original designation (Art. 68.2 ICZN);
References
Root resorption during tooth replacement in sharks – a unique character of the Hybodontiformes (Chondrichthyes, Elasmobranchii). Palaeodiversity, 17(1), 121–194
DOI: 10.18476/pale.v17.a6
New data on Cretaceous freshwater hybodont sharks from Guangxi Province, South China. Research & Knowledge, 3(1), 11–15
Early Cretaceous vertebrates from the Xinlong Formation of Guangxi (southern China): a review. Geological Magazine, 153(1), 143–159
DOI: 10.1017/S0016756815000394
Freshwater hybodont sharks in Early Cretaceous ecosystems : A review. In Bernissart dinosaurs and Early Cretaceous terrestrial ecosystems, GODEFROIT, P.(ed.), Indiania University Press, Bloomington: 519–529
Hybodont sharks from the Lower Cretaceous Khok Kruat Formation of Thailand, and hybodont diversity during the Early Cretaceous. Geological Society, London, Special Publications, 295, 93–107
DOI: 10.1144/SP295.7
The Mesozoic fossil record of sharks in Thailand. Proceedings of the International Conference on geology of Thailand: towards sustainable development and sufficiency economy, TANTIWANIT W.(ed.), Department of Mineral Resources, Bangkok, Thailand, 349–354
A new elasmobranch assemblage from the Lower Cretaceous of Thailand. Palaeontology, 49(3), 547–555
DOI: 10.1111/j.1475-4983.2006.00555.x
Root resorption during tooth replacement in sharks – a unique character of the Hybodontiformes (Chondrichthyes, Elasmobranchii). Palaeodiversity, 17(1), 121–194
DOI: 10.18476/pale.v17.a6
New data on Cretaceous freshwater hybodont sharks from Guangxi Province, South China. Research & Knowledge, 3(1), 11–15
Early Cretaceous vertebrates from the Xinlong Formation of Guangxi (southern China): a review. Geological Magazine, 153(1), 143–159
DOI: 10.1017/S0016756815000394
Freshwater hybodont sharks in Early Cretaceous ecosystems : A review. In Bernissart dinosaurs and Early Cretaceous terrestrial ecosystems, GODEFROIT, P.(ed.), Indiania University Press, Bloomington: 519–529
Hybodont sharks from the Lower Cretaceous Khok Kruat Formation of Thailand, and hybodont diversity during the Early Cretaceous. Geological Society, London, Special Publications, 295, 93–107
DOI: 10.1144/SP295.7
The Mesozoic fossil record of sharks in Thailand. Proceedings of the International Conference on geology of Thailand: towards sustainable development and sufficiency economy, TANTIWANIT W.(ed.), Department of Mineral Resources, Bangkok, Thailand, 349–354
A new elasmobranch assemblage from the Lower Cretaceous of Thailand. Palaeontology, 49(3), 547–555
DOI: 10.1111/j.1475-4983.2006.00555.x
