Platyphoca Van Beneden 1877

• Main Authors: Koretsky, I., Rahmat, S., Peters, N.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Mammalia; Carnivora; Phocidae; Platyphoca; Beneden; Van Beneden; Mølle; Erignathus barbatus
• Online Access: https://doi.org/10.5281/zenodo.6462225; http://treatment.plazi.org/id/03D087B7D176FFCB68FF2E9BFD67FBAB

Genus Platyphoca Van Beneden, 1877 1876 a Platyphoca Van Beneden: 798 (nom. nud.); *1877 Platyphoca Van Beneden: 67–68; 1904 Phoca ( Platyphoca ) Trouessart: 285; 1909 Platyphoca Dollo: 118; 1922 Platyphoca Kellogg: 117; 1945 Platyphoca Simpson: 122; 1947 Phoca ( Platyphoca ) Friant: 7, 10, 14; 1958 Platyphoca Misonne: 22; 1964 Platyphoca King: 131; 1977 Platyphoca Ray: 94; 1983 Platyphoca Savage, Russell: 294; 1992 Platyphoca Muizon: 36; 1997 Platyphoca McKenna, Bell: 258; 2008 Platyphoca Koretsky, Ray: 84–85, 103–105. T y p e s p e c i e s: Platyphoca vulgaris Van Beneden, 1877, by original monotypy. Holotype from middle (?) Pliocene (Scaldisian) deposits in the Antwerp area, Belgium. S t r a t i g r a p h i c a l r a n g e. The type species is also known from the Pliocene (5.0– 5.8 ma) Yorktown Formation of the eastern United States. Herein, we introduce a new species from the late Miocene (early-middle Tortonian, 8.0–11.5 ma) Gram Formation of Gram and Skaerum MØlle, Jutland, western Denmark. R e f e r r e d m a t e r i a l. Humeri, 2nd phalanx, innominata, metatarsal IV, tibia, and humeri from the Antwerp area, Belgium, from western Denmark, and from the eastern United States (see Koretsky, Ray, 2008). E m e n d e d d i a g n o s i s. Deltoid crest of humerus very short and terminating at less than 1/2 of length of bone; from base of lesser tubercle, along medial surface of bone, passes a crest that is only slightly shorter than deltoid crest; maximal enlargement of deltoid crest in its proximal part; intertubercular groove very shallow and not well defined; both epicondyles well developed and very wide; distal part of each epicondyle flat. D i s c u s s i o n. Platyphoca vulgaris (pl. 3, 1A–1B ) was originally mentioned by Van Beneden (1876 a), who considered it to be very close to the Recent Erignathus barbatus . The size of the humerus approaches that of Erignathus more closely than any other phocid. This poorly known, obscure, but distinctive species was described on the basis of only a few bones of the ...