Oneotodus sp.

Zhen, Yong Yi, Percival, Ian G. & Webby, Barry D., 2003, Early Ordovician Conodonts from Far Western New South Wales, Australia, Records of the Australian Museum 55 (2), pp. 169-220 : 203

Oneotodus sp.

Fig. 24E,F

Oneotodus sp. Cooper, 1981: 172 , pl. 27, figs. 1, 2.

Material. Six specimens from the Tabita Formation at Mount Arrowsmith, and one specimen from unnamed dolomitic limestone unit at Koonenberry Gap .

Remarks. The generic concept of Oneotodus adopted here follows that given by Ethington & Brand (1981) and Sweet (1988: 52). The western New South Wales species is comparable with specimens illustrated from the Horn Valley Siltstone ( Cooper, 1981). It is a simple cone unit, with shallow but flaring basal cavity, which is rounded in basal view ( Fig. 24E ); in cross section, the cusp is rounded near the base and laterally compressed distally. Some elements display weak costae on the lateral faces ( Fig. 24F ).

Figures

Fig. 24. A–D, Protoprioniodus yapu Cooper, 1981: A, M element, AMF120448, M/A7, posterior view; B,C, Pb element, AMF 120449, Y4–2, B, outer lateral view, C, inner lateral view; D, Pb element,AMF120450, M/A7, outer lateral view. E,F, Oneotodus sp.: E, AMF120451, M/A11-3, posterolateral view; F, AMF 124226, C1612, inner lateral view. Scale bars 100 µm.