Oioceros atropatenes ( Rodler and Weithofer, 1890 )

Kostopoulos, Dimitris S., 2014, Taxonomic re-assessment and phylogenetic relationships of Miocene homonymously spiral-horned antelopes, Acta Palaeontologica Polonica 59 (1), pp. 9-29 : 19

Oioceros atropatenes ( Rodler and Weithofer, 1890)

Lectotype (designated by Bouvrain and Bonis 1985): Right horncore, NHMW 1886/0028/0004 ( Rodler and Weithofer 1890: pl. 6: 5).

Type locality: Maragheh, Iran (unknown level).

Type horizon: Presumably Turolian, Late Miocene.

Emended diagnosis.—Small size; homonymosusly torsioned horncores weakly compressed mediolaterally ( Fig. 1 ); anterior keel absent; supraorbital pits large, triangular, and located close to the horncore bases; nasals widening posteriorly, and long compared to the frontals; ethmoidal fissure almost closed; basioccipital relatively broad and grooved; braincase relatively shorter than in O. rothii , with a less convex dorsal profile.

Remarks.— O. atropatenes was revised by Heintz (1963), with later additions and modifications by Bouvrain and Bonis (1985), Watabe (1990), and Kostopoulos and Bernor (2011).

Geographic and stratigraphic range.— Kostopoulos and Bernor (2011) reported this species from the MMTT9 Maragheh fossil site upwards, suggesting a late early to middle Turolian age. The species furthermore occurs in the middle Turolian locality of Ivand−1, Iran ( Sen and Purabrishemi 2010). Additional occurrences at Kayadibi, Turkey and Rustavi, Georgia, are doubtful.

Figures

Fig. 1. Box−plots of the horncore basal compression index (i.e., TD*100/ ADP) for several species and genera of Oiocerina, showing the medial (horizontal line inside the boxes), the 25–75% quartiles (gray boxes) and the minimum and maximum range of values (short horizontal lines). NKT−1, Nikiti−1; RZ1, Ravin des Zouaves 1.