Sphyrna guinoti
Adnet et al., 2020
Classification: Elasmobranchii Carcharhiniformes Sphyrnidae
Reference of the original description
Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia. Palaeontologica Electronica, 23(2), Article a38
Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia. Palaeontologica Electronica, 23(2), Article a38
Description:
Citation: Sphyrna guinoti Adnet et al., 2020: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
Description
Original diagnosis after Adnet et al., 2020 [28754]: Medium sphyrnid species only known by isolated teeth reaching 8 mm in width with a well-marked dignathic heterodonty which is reflected in bended blade-like cusps in upper teeth and high, erected cusps in lower teeth. Cutting edges of cusp and heels are totally smooth in both jaws. If upper teeth are reminiscent to those of all other upper teeth of fossil Sphyrna, lower teeth have a particularly well erected cusp and root is peculiarly massive medially with a deep and wide nutritive groove as observed in Recent S. tudes but the asymmetrical root lobes and heel distinct S. guinoti from this last.
Original diagnosis after Adnet et al., 2020 [28754]: Medium sphyrnid species only known by isolated teeth reaching 8 mm in width with a well-marked dignathic heterodonty which is reflected in bended blade-like cusps in upper teeth and high, erected cusps in lower teeth. Cutting edges of cusp and heels are totally smooth in both jaws. If upper teeth are reminiscent to those of all other upper teeth of fossil Sphyrna, lower teeth have a particularly well erected cusp and root is peculiarly massive medially with a deep and wide nutritive groove as observed in Recent S. tudes but the asymmetrical root lobes and heel distinct S. guinoti from this last.
Remarks
shark-references Species-ID=16001;
shark-references Species-ID=16001;
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
Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia. Palaeontologica Electronica, 23(2), Article a38
DOI: 10.26879/1085
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
Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia. Palaeontologica Electronica, 23(2), Article a38
DOI: 10.26879/1085
