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Nebriimimus wardi
Taxonomy
Nebriimimus wardi was named by Collareta et al. (2021). Its type specimen is MSNUP I-16950, a tooth (lateroposterior tooth), and it is a 3D body fossil. Its type locality is Acrille quarry, which is in a Zanclean deltaic sandstone in Italy. It is the type species of Nebriimimus.
Synonymy list
| Year | Name and author |
|---|---|
| 2021 | Nebriimimus wardi Collareta et al. figs. Figs. 3-4 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Nebriimimus wardi Collareta et al. 2021
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Collareta et al. 2021 | A rajiform skate known from four teeth display- ing the following unique combination of characters: teeth relatively large-sized, reaching 5.5 mm in maximum mesio- distal width; crown relatively low, comprised of a smooth enameloid surface, in which a single transverse keel devel- ops a complete, multicuspid cutting edge; mesial and distal margins of transverse keel sharp, concavely arched, reach- ing the crown base; up to three, well-distinct, blunt to mod- erately 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 form- ing 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 pro- tuberance 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, dis- playing 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 hetero- donty present, anterior teeth symmetrical, lateroposterior teeth asymmetrical, having the main cusp deflected towards the commissure and poorly individualised lateral cusplets. |
Measurements
No measurements are available
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| Source: o = order, subp = subphylum | |||||
| References: Wagner 2023, Hendy et al. 2009, Carroll 1988 | |||||