Drepanoistodus 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 : 194

Drepanoistodus sp.

Fig. 14L

Material. Four specimens from limestone nodules within shales of the upper Yandaminta Quartzite , and four specimens from the Tabita Formation, at Mount Arrowsmith; an additional specimen from unnamed dolomitic limestone unit at Koonenberry Gap .

Remarks. Specimens of a large suberect element, here identified as Drepanoistodus sp. ( Fig. 14L), are asymmetrical with the basal cavity inflated inner-laterally and with an undulose basal margin at the inner side. Löfgren (1978) noticed some variations among Swedish specimens assigned to the P element of D. basiovalis . Some forms showing a flaring anterobasal corner ( Löfgren, 1978, pl. 1, fig. 13), are comparable with the elements here referred to D. sp. This element might occupy the Pa position to complete a seximembrate apparatus for D. basiovalis .