Nebriimimus wardi
Collareta, Mollen, Merella, Casati & Di Cencio, 2021
Classification: Elasmobranchii Rajiformes Rajidae
Reference of the original description
Remarkable multicuspid teeth in a new elusive skate (Chondrichthyes, Rajiformes) from the Mediterranean Pliocene. Paläontologische Zeitschrift, 95, 117–128
Remarkable multicuspid teeth in a new elusive skate (Chondrichthyes, Rajiformes) from the Mediterranean Pliocene. Paläontologische Zeitschrift, 95, 117–128
Images of types
Description:
Citation: Nebriimimus wardi Collareta, Mollen, Merella, Casati & Di Cencio, 2021: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2024
Please send your images of "Nebriimimus wardi" to info@shark-references.com
Nebriimimus wardi gen. et sp. nov., MSNUP I-16950 (holotype), lateroposterior tooth from the lower Pliocene (Zanclean) of Arcille (Campagnatico, Grosseto Province, Tuscany, central Italy) in a apical; b labial; c basal; d mesial; e lingual; and f distal views. Scale bar = 5 mm © Alberto Collareta et al., 2021
Nebriimimus wardi gen. et sp. nov., MSNUP I-16950 (holotype), lateroposterior tooth from the lower Pliocene (Zanclean) of Arcille (Campagnatico, Grosseto Province, Tuscany, central Italy) in a apical; b labial; c basal; d mesial; e lingual; and f distal views. Scale bar = 5 mm © Alberto Collareta et al., 2021
Distribution Geographic
Italy: Arcille quarry, Campagnatico, Grosseto Province, Tuscany
Italy: Arcille quarry, Campagnatico, Grosseto Province, Tuscany
Distribution Strategraphy
Pliocene, Zanclean: marine sandstones belonging to the S2 Synthem of the Tuscan Pliocene
Pliocene, Zanclean: marine sandstones belonging to the S2 Synthem of the Tuscan Pliocene
Description
Original diagnose after Collerta et al. (2021) [29382]: A rajiform skate known from four teeth displaying the following unique combination of characters: teeth relatively large-sized, reaching 5.5 mm in maximum mesiodistal width; crown relatively low, comprised of a smooth enameloid surface, in which a single transverse keel develops a complete, multicuspid cutting edge; mesial and distal margins of transverse keel sharp, concavely arched, reaching the crown base; up to three, well-distinct, blunt to moderately pointed cusplets present on each side of the more prominent, robust, central main cusp; cusplets decreasing in size towards the crown base and converging towards or parallel to the central main cusp, never diverging radially; labial crown face well-developed, very oblique and concavo-convex in profile, with one to three irregular labiolingual ridges, forming parallel depressions in-between; second transverse keel (i.e. labial cutting edge) not present; basal margin of the crown strongly convex and undulate, following the labiolingual ridges and depressions, often displaying a central indentation for tooth interlocking; central ridge forming a prominent bulge ornamenting the apron; apron broad, basally inclined, not reaching the root base; lingual crown face reduced, abrupt, incised by two subvertical grooves that represent prolongations of the main cusp edges and project at the sides of the central uvula; central uvula present, well-distinct, low, rounded, supported by a large medial protuberance of the inner root part; prominent lateral uvulae absent, but a pair of lateral, much smaller protuberances of the inner root often present; crown slightly broader than the root; crown-root junction incised, with no root coating; root roughly cordiform, low, robust, not displaced lingually; root base almost flat; vascularisation pattern holaulacorhize, with a deep central nutrient groove dividing the root in two lobes; nutrient groove expanding anteriorly in its anterior half, displaying several nutrient foramina of variable size and shape in its median region; additional foramina often present at the sides of the root; root lobes similar in size to each other, only weakly flaring distally, contributing equally to form the central lingual root protuberance; monognathic heterodonty present, anterior teeth symmetrical, lateroposterior teeth asymmetrical, having the main cusp deflected towards the commissure and poorly individualised lateral cusplets.
Original diagnose after Collerta et al. (2021) [29382]: A rajiform skate known from four teeth displaying the following unique combination of characters: teeth relatively large-sized, reaching 5.5 mm in maximum mesiodistal width; crown relatively low, comprised of a smooth enameloid surface, in which a single transverse keel develops a complete, multicuspid cutting edge; mesial and distal margins of transverse keel sharp, concavely arched, reaching the crown base; up to three, well-distinct, blunt to moderately pointed cusplets present on each side of the more prominent, robust, central main cusp; cusplets decreasing in size towards the crown base and converging towards or parallel to the central main cusp, never diverging radially; labial crown face well-developed, very oblique and concavo-convex in profile, with one to three irregular labiolingual ridges, forming parallel depressions in-between; second transverse keel (i.e. labial cutting edge) not present; basal margin of the crown strongly convex and undulate, following the labiolingual ridges and depressions, often displaying a central indentation for tooth interlocking; central ridge forming a prominent bulge ornamenting the apron; apron broad, basally inclined, not reaching the root base; lingual crown face reduced, abrupt, incised by two subvertical grooves that represent prolongations of the main cusp edges and project at the sides of the central uvula; central uvula present, well-distinct, low, rounded, supported by a large medial protuberance of the inner root part; prominent lateral uvulae absent, but a pair of lateral, much smaller protuberances of the inner root often present; crown slightly broader than the root; crown-root junction incised, with no root coating; root roughly cordiform, low, robust, not displaced lingually; root base almost flat; vascularisation pattern holaulacorhize, with a deep central nutrient groove dividing the root in two lobes; nutrient groove expanding anteriorly in its anterior half, displaying several nutrient foramina of variable size and shape in its median region; additional foramina often present at the sides of the root; root lobes similar in size to each other, only weakly flaring distally, contributing equally to form the central lingual root protuberance; monognathic heterodonty present, anterior teeth symmetrical, lateroposterior teeth asymmetrical, having the main cusp deflected towards the commissure and poorly individualised lateral cusplets.
Remarks
shark-references Species-ID=16115;
type species of Nebriimimus Collerta et al., 2021 p. [29382] by original designation (Art. 68.2 ICZN);
valid after Collerta et al. (2021) p. [29382];
shark-references Species-ID=16115;
type species of Nebriimimus Collerta et al., 2021 p. [29382] by original designation (Art. 68.2 ICZN);
valid after Collerta et al. (2021) p. [29382];
Image gallery
References
Remarkable multicuspid teeth in a new elusive skate (Chondrichthyes, Rajiformes) from the Mediterranean Pliocene. Paläontologische Zeitschrift, 95, 117–128
DOI: 10.1007/s12542-020-00542-7
Remarkable multicuspid teeth in a new elusive skate (Chondrichthyes, Rajiformes) from the Mediterranean Pliocene. Paläontologische Zeitschrift, 95, 117–128
DOI: 10.1007/s12542-020-00542-7
