Skalenoprion sp. A

Szaniawski, Hubert & Drygant, Daniel, 2014, Early Devonian scolecodonts from Podolia, Ukraine, Acta Palaeontologica Polonica 59 (4), pp. 967-983 : 980

Skalenoprion sp. A

Fig. 8N, O.

Material. —Two right MI and one left MI ( ZPAL Sc.8/13.1, 13.2), partly broken during preparation. Besides, two left MI became completely damaged during preparation. All were found in the same sample S.Dn.1 from the Silurian–Devoni- an transition beds, section 64, Dnistrove, Podolia.

Description. —Right MI has hook about twice as long as basal part of the jaw. Inner margin of the basal part denticulated only in its upper part, bears 4–5 denticles of nearly equal size. Lower part of the margin in form of the ridge. Fused basal plate short, undenticulated, well separated from the inner margin by a furrow. Inner wing narrow and short, visible only beneath the denticles. Outer margin convex, except of the most posterior part where forms deep incision. Posterior margin nearly straight, directed postero-medially. Left MI close to the mirror image of the right MI but without the basal plate.

Comparisons. —The species is most similar to Skalenoprion alatus Kielan-Jaworowska, 1962 but differ from it by longer hook and undenticulated posterior part of the inner margin.