Pachycynodon cf. dubius ( Filhol, 1882 ), Schlosser, 1888

Bonis, Louis de, Gardin, Axelle & Blondel, Cécile, 2019, Carnivora from the early Oligocene of the ‘ Phosphorites du Quercy’ in southwestern France, Geodiversitas 41 (15), pp. 601-621 : 610

publication ID	https://doi.org/ 10.5252/geodiversitas2019v41a15
publication LSID	urn:lsid:zoobank.org:pub:9DD3CC29-3AEA-44B8-8E8F-6AD882DF5B1C
DOI	https://doi.org/10.5281/zenodo.3703515
persistent identifier	https://treatment.plazi.org/id/03A48799-1A6B-FF95-FF4B-FD5A6C77F863
treatment provided by	Valdenar
scientific name	Pachycynodon cf. dubius ( Filhol, 1882 )
status

Treatment

Pachycynodon cf. dubius ( Filhol, 1882)

( Fig. 3 View FIG C-E)

TYPE SPECIMEN. — Holotype by monotypy: hemi-mandible with p2- m2 ( Filhol 1882: 48-52, pl. VII, figs 11-13), MNHN.F.QU9231.

NEW MATERIAL. — Hemi-mandible with m1-m2, UM VD 4; hemi-mandible with m1-m3, UM VD 6; hemi-mandible with m1-m2, UM VD 14.

REMARK

The name dubius is due to doubts by Filhol that it belonged in Cynodictis because of the grouped trigonid of m1, which differs from that of other species of the genus. Teilhard (1915) reassigned the specimen to Pachycynodon . This species is smaller than P. boriei and P. curvirostris, its size being closer to that of P. filholi . It differs from the latter by its slightly larger size, the greater height of the dentary, p2-3 (absent in our material) lower relative to p4 and with blunt mesial and distal edges, a broad p4 with a larger pacd and more inflated cuspids of the trigonid, m1 paraconid more oblique relatively to the sagittal plane, metaconid larger and higher than the paraconid, distal cristid of the metaconid joining, after a gentle slope, the preentocristid by uninterrupted connection or after a small notch, hypoconid slightly higher than the entoconid, talonid basin often with enamel wrinkling and distally open, m2 without or with a tiny paraconid and low mesial cristid enclosing a small fovea ( Fig. 3C, D View FIG ). Like in P. filholi , m3 has a small circular crown ( Fig. 3E View FIG 1 View FIG , E 2 View FIG ). We include, with some hesitation, the isolated m2 UM VBOA3-9 ( Fig. 5G View FIG ). It is unworn and less elongate than in P. filholi . The metaconid is larger and especially higher than the protoconid. These two cusps are separated and there is no mesial fovea, but a long basin extends from the mesial to the distal cristid. A clear paraconid is present in front of the metaconid. The protoconid is followed by a slight sinus and a cristid joining the postmetacristid, separates the trigonid from the talonid basin. It differs from the proportions of m 2 in P. filholi but is smaller than m 2 in UM VD4 or VD14. The lack of complete specimens prevents a definitive identification.