Gutturensis neilsoni
(Traquair, 1898)
Classification: Holocephali Symmoriiformes Symmoriidae
Reference of the original description
On Cladodus neilsoni (Traquair), from the Carboniferous limestone of East Kilbride. Transactions of the Geological Society of Glasgow, 11, 41–50
On Cladodus neilsoni (Traquair), from the Carboniferous limestone of East Kilbride. Transactions of the Geological Society of Glasgow, 11, 41–50
Types
Gutturensis neilsoni
Gutturensis neilsoni
Description:
Citation: Gutturensis neilsoni (Traquair, 1898): In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 09/2026
Material
Material of the first description (Cladodus neilsoni Traquair, 1898) [4072]: 1 sceleton (holotype)
Material of the first description (Cladodus neilsoni Traquair, 1898) [4072]: 1 sceleton (holotype)
Description
Revised diagnosis after Sequeira & Coates, 2000 [4031]: As for genus: A symmoriid shark as defined by Zangerl (1990), but which cannot be assessed for postpectoral symmoriid synapomorphies. Neurocranial ratio of ethmo-orbital to otico-occipital proportions c. 2:1; postorbital process length less than total width of otico-occipital unit; supraorbital shelf with concave rim; short lateral otic processes present; persistent otico-occipital fissure. Few more than six, well spaced, tooth families present on each jaw ramus. Posteriormost epibranchial anteroposteriorly narrow and rod-like, resembling anterior members of series; elongate and posteriorly slender basibranchial copula. Pectoral fin with six proximal radials articulating directly with girdle; metapterygium triangular, followed by jointed axial whip.
Revised diagnosis after Sequeira & Coates, 2000 [4031]: As for genus: A symmoriid shark as defined by Zangerl (1990), but which cannot be assessed for postpectoral symmoriid synapomorphies. Neurocranial ratio of ethmo-orbital to otico-occipital proportions c. 2:1; postorbital process length less than total width of otico-occipital unit; supraorbital shelf with concave rim; short lateral otic processes present; persistent otico-occipital fissure. Few more than six, well spaced, tooth families present on each jaw ramus. Posteriormost epibranchial anteroposteriorly narrow and rod-like, resembling anterior members of series; elongate and posteriorly slender basibranchial copula. Pectoral fin with six proximal radials articulating directly with girdle; metapterygium triangular, followed by jointed axial whip.
References
Reassessment of 'Cladodus' neilsoni Traquair: a primitive shark from the Lower Carboniferous of East Kilbride, Scotland. Palaeontology, 43(1), 153–172
DOI: 10.1111/1475-4983.00122
Reassessment of 'Cladodus' neilsoni Traquair: a primitive shark from the Lower Carboniferous of East Kilbride, Scotland. Palaeontology, 43(1), 153–172
DOI: 10.1111/1475-4983.00122
