Eoplatyrhina, Marram̀ & Carneval & Claeso & Naylo & Kriwe, 2020

Marram ̀, Giuseppe, Carneval, Giorgio, Claeso, Kerin M., Naylo, Gavin J. P. & Kriwe, Jurgen, 2020, Revision of the Eocene ‘ Platyrhina’ species from the Bolca Lagerst atte (Italy) reveals the first panray (Batomorphii: Zanobatidae) in the fossil record, Journal of Systematic Palaeontology 18 (18), pp. 1519-1542 : 1522-1523

Genus † Eoplatyrhina gen. nov.

Type species. † Platyrhina bolcensis Heckel, 1851 .

Diagnosis. Platyrhinid characterized by the following combination of characters: rostral cartilage very long, almost reaching the anterior border of the disc; anterior fontanel extending through the entire length of the rostral cartilage with a closed and concave posterior border; nasal capsules at right angles to the rostrum; single small horn on nasal capsule; large space between the hyomandibulae and mandibular arch; approximately 132 vertebral centra (20–24 trunk centra; 113–118 centra from puboischiadic bar to the tip of tail); 15 or 16 rib pairs; 81–87 pectoral radials (35–38 propterygial, 8–10 mesopterygial, 38–41 metapterygial); 18–21 pelvic radials; short, straight and stout claspers (about 10% of total length; TL, hereafter); 20–25 caudal-fin radials on both ventral and dorsal sides (40–50 in total); thorns absent.

Derivation of name. The name is derived from the Greek E ̄os, pertaining to the sunrise, as well as to the goddess of dawn and the epoch from which the taxon is found, plus Platyrhina , a living thornback ray, therefore indicating a close relationship of this latter genus with the new taxon.

Included species. Type species only.