Thiesus concavus
Guinot, Cappetta & Adnet, 2014
Classification: Elasmobranchii Carcharhiniformes Scyliorhinidae
Reference of the original description
A rare elasmobranch assemblage from the Valanginian (Lower Cretaceous) of southern France. Cretaceous Research, 48, 54–84
A rare elasmobranch assemblage from the Valanginian (Lower Cretaceous) of southern France. Cretaceous Research, 48, 54–84
Description:
Citation: Thiesus concavus Guinot, Cappetta & Adnet, 2014: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 11/2024
Description
Original diagnose after Guinot et al. (2014) p. 77 [20107]: Minute-sized teeth not exceeding 1 mm in height with moderate gradient monognathic heterodonty. Tooth crown higher thanwide to as high as wide inposteriors. Lingually inclined elongate main cusp flanked by up to two pairs of little individualised lateral cusplets. Elongate labially directed mesial and distal heels. Labial crown edge strongly concave in labial viewand overhanging the root. Labial crownornament of scarce short vertical ridges on basal edge of the heels, more numerous and covering the labial crown face toward posterior files. Lingual crown ornament of slight irregular vertical ridges on main cusp and occasionally on cusplets. Hemiaulacorhize Y-shaped root with flared basal face. Strongly developed lingual protuberance with medio-central foramen. Elongate root branches with wide labial extremities. Numerous labial and margino-lingual foramina and one central foramen on the basal face.
Original diagnose after Guinot et al. (2014) p. 77 [20107]: Minute-sized teeth not exceeding 1 mm in height with moderate gradient monognathic heterodonty. Tooth crown higher thanwide to as high as wide inposteriors. Lingually inclined elongate main cusp flanked by up to two pairs of little individualised lateral cusplets. Elongate labially directed mesial and distal heels. Labial crown edge strongly concave in labial viewand overhanging the root. Labial crownornament of scarce short vertical ridges on basal edge of the heels, more numerous and covering the labial crown face toward posterior files. Lingual crown ornament of slight irregular vertical ridges on main cusp and occasionally on cusplets. Hemiaulacorhize Y-shaped root with flared basal face. Strongly developed lingual protuberance with medio-central foramen. Elongate root branches with wide labial extremities. Numerous labial and margino-lingual foramina and one central foramen on the basal face.
Remarks
shark-references Species-ID=13851;
type species of Thiesus Guinot et al. (2014) p. 77 [20107] by original designation (Art. 68.2 ICZN);
valid after Guinot et al. (2014) p. 77 [20107];
shark-references Species-ID=13851;
type species of Thiesus Guinot et al. (2014) p. 77 [20107] by original designation (Art. 68.2 ICZN);
valid after Guinot et al. (2014) p. 77 [20107];
References
Combining palaeontological and neontological data shows a delayed diversification burst of carcharhiniform sharks likely mediated by environmental change. Scientific Reports, 12, Article 21906
DOI: 10.1038/s41598-022-26010-7
A rare elasmobranch assemblage from the Valanginian (Lower Cretaceous) of southern France. Cretaceous Research, 48, 54–84
DOI: 10.1016/j.cretres.2013.11.014
Combining palaeontological and neontological data shows a delayed diversification burst of carcharhiniform sharks likely mediated by environmental change. Scientific Reports, 12, Article 21906
DOI: 10.1038/s41598-022-26010-7
A rare elasmobranch assemblage from the Valanginian (Lower Cretaceous) of southern France. Cretaceous Research, 48, 54–84
DOI: 10.1016/j.cretres.2013.11.014
