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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Eorhinobatos
Taxonomy
Eorhinobatos was named by Marramà et al. (2020). Its type is Rhinobatus primaevus.
It was assigned to Rhinobatidae by Marramà et al. (2020).
It was assigned to Rhinobatidae by Marramà et al. (2020).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2020 | Eorhinobatos Marramà et al. p. 9 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Marramà et al. 2020 | A rhinobatid guitarfish with wedge-shaped pectoral disc slightly longer than wide; rounded, blunt anterior apex forming an angle of about 57 degrees; horn-like processes on nasal capsules absent; antorbital cartilages robust, triangular in shape with regular outline, articulating distally to the anteriormost portion of the propterygia; arcualia dorsalis absent; ten to 12 pairs of ribs; propterygia distally segmented, with the first segment lying near the level of the mouth, without reaching the level of the nasal capsules; propterygial radials extend as far as the nasal capsule level; 62–64 pectoral-fin radials of which about 30 are propterygial, 11–13 mesopterygial, one to two neopterygial and 20 metapterygial; dermal covering formed by small, numerous and closely packed dermal denticles showing smooth pentagonal or hexagonal crown; large thorns absent; few scattered roundish thornlets on the scapular region; teeth extremely small (up to 650 μm); crown high but mesiodistally short; lingual visor convex; long central uvula with rounded and not enlarged extremity; two incipient and divergent lateral uvulae; transverse keel separating the labial and lingual faces of the crown with a wide obtuse angle; enameloid surface completely smooth; root bilobed, massive, and almost as broad as the crown; root with undulated margins; very marked and deep furrow with a single central nutritive foramen; two additional foramina on lingual root face; weak collar on the upper part of the root stem. |