Iberomeryx sp.

Métais, G, Albayrak, E, Antoine, P, Erdal, O, Karadenizli, L, Oyal, N, Saraç, G, İslamoğlu, Y & Sen, S, 2016, Oligocene ruminants from the Kızılırmak Formation, Çankırı-Çorum Basin, Central Anatolia, Turkey, Palaeontologia Electronica 19 (3), pp. 1-23 : 12

Iberomeryx sp.

Figures 3.22 , 4.17 -21

Referred material. talonid of a left p4 ( GK 3-35), right astragali ( GK 3-18; TP641-23; TP641-24; TP 641-25), fragmentary distal extremity of right tibia (KZ-1), left cubonavicular (KZ-2), distal extremity of a phalanx proximalis (KZ-3, BA-8, TP 641-29), distal extremity of metartarsal ( GK 3- 47), and right calcaneum (KZ-11).

Description and Comparisons

This large species of Iberomeryx is based on bones of the tarsus ( Figure 4.17 -21), a distal extremity of tibia, and a talonid of p4 ( Figure 3.22 ), which do not fit within the size range of I. parvus , as deduced from the size variation of the extant tragulid Tragulus kanchil . Moreover, the estimates of body size ( Table 3) made on the astragalus widely exceed the body size variation of the type of I. parvus . The large p4, which is built on the same model as the p4 of I. parvus , is about twice the size of the latter ( Figure 3.22 ). Likewise, there is no morphological difference between the postcranial bones of Iberomeryx sp. and those referred to I. parvus . Given the paucity of the present material and pending additional data, we prefer to leave this taxon as Iberomeryx sp.

Figures

FIGURE 3. Dental remains of Iberomeryx parvus and Iberomeryx sp. from the Kızılırmak Formation (early late Oligocene, Central Anatolia). Iberomeryx parvus: 1, Right maxilla with D2-M1 in occlusal view, GK2-4; 2, Left M2 in occlusal view, GK3-31; 3, Left M1 in occlusal view, KZ-7; 4-5, Left M2 in occlusal (4) and labial (5) views, TP641-12; 6-7, Right lower jaw with d3-d4 and the trigonid of m1 in occlusal (6, with line drawing below) and lingual (7) views, GK2-11; 8, Right P4 in occlusal view, GK3-5; 9-10, Right P2 in occlusal (9) and labial (10) views, GK3-4; 11, Left m1 in occlusal view, TP641-4; 12-13, Right m1 in occlusal (12) and labial (13) views, GK3-3; 14-15, Left lower jaw with the talonid of m1 and the trigonid of m2 in occlusal (14) and labial (15) views, TP641-1; 16-17, Left lower jaw with m3 in occlusal (16) and lingual (17) views, TP641-2; 18, Left i1 in lingual view, GK3-7; 19, Left i2 or i3 in lingual view GK3-6; 20, Right p3 in occlusal view, GK3-11; 21, Right p4 in occlusal view, GK3-36. Iberomeryx sp.: 22, Talonid of a left p4 in occlusal view, GK3-35. The scale bar 3 mm goes exclusively with the views 20 to 22.

FIGURE 4. Postcranial remains of Iberomeryx parvus and Iberomeryx sp. from the Kızılırmak Formation (early late Oligocene, Central Anatolia). Iberomeryx parvus: 1, Right cubonavicular in anterior view, TP641-16; 2-3, Right astragalus in anterior (2) and posterior (3) views, GK3-39; 4, Right cubonavicular in anterior view, GK2-5; 5-6, Right astragalus in anterior (5) and posterior (6) views, GK3-37; 7, Left calcaneum in medial view, GK3-24. 8, Right calcaneum in medial view, KZ-11; 9-11, Left distal humerus in anterior-cranial (9), lateral (10), and medial (11) views, GK3-22; 12- 13, Proximal part of coalescent metatarsals III and IV in anterior (12), and medial (13) views, GK3-54; 14-16, phalanx proximalis in anterior (14), lateral (15), and proximal views, GK3-13; Iberomeryx sp. 17, Left cubonavicular in anterior view, KZ-2; 18-21, Right astragalus in anterior (18), posterior (19), lateral (20), medial (21) views, TP641-24. Anatomical abbreviations: acf, astragalo-calcaneal facet; ca, capitulum; daf, distal astragalar facet; fbf, fibular facet; imf, internal malleous facet; me, medial epicondyle; of, olecranon fossa; smt2, contact surface of the Mt2; stf, sustentacular facet.