Ferganoceratodus, KAZNYSHKIN & NESSOV, 1985

Cavin, Lionel, Suteethorn, Varavudh, Buffetaut, Eric & Tong, Haiyan, 2007, A new Thai Mesozoic lungfish (Sarcopterygii, Dipnoi) with an insight into post-Palaeozoic dipnoan evolution, Zoological Journal of the Linnean Society 149 (2), pp. 141-177 : 143-144

FERGANOCERATODUS KAZNYSHKIN & NESSOV, 1985

Diagnosis (emended): Skull roof with two unpaired bones in the median series, two paired bones on the mediolateral series and two bones on the lateral series; bones of the median series suture through a short contact; dental plates of cutting type, with five radiating ridges on the upper plates and four radiating ridges on the lower plates separated by deep notches.

Type species: Ferganoceratodus jurassicus Kaznyshkin & Nessov, 1985 ( Fig. 2 ).

Diagnosis (emended): Ferganoceratodus with an overlapping suture between the posterior bone of the median series and the paired anterior bones of the mediolateral series ( Fig. 2 , c.a.a.ml.b and c.a.p.m.b); posterior bone overlapping the anterior bone of the mediolateral series along a narrow strip; posterior bone of the mediolateral series with a median process covered by the bone of the median series ( Fig. 2A, A′ , p); lower tooth plates with a first notch significantly deeper than the following ones, with an inner angle of about 90°.

Figures

Figure 2. A, Ferganoceratodus jurassicus Kaznyshkin & Nessov, 1985: ossifications of the skull roof. A, dorsal views; A′, internal views. a, right anterior bone of the mediolateral series (holotype, no. 3/12217); b, anterior bone of the median series; c, left posterior bone of the lateral series; d, posterior bone of the median series. B, occlusal views of upper (a, f) and lower tooth plates (b–e) (material: no. 1-13/12217 and 26-90/12217). Scale bars: 10 mm.