Drepanoistodus Lindström, 1971

Zhen, Yong Yi & Nicoll, Robert S., 2009, Biogeographic and Biostratigraphic Implications of the Serratognathus bilobatus Fauna (Conodonta) from the Emanuel Formation (Early Ordovician) of the Canning Basin, Western Australia, Records of the Australian Museum 61 (1), pp. 1-30 : 13

Drepanoistodus Lindström, 1971

Type species. Oistodus forceps Lindström, 1955 .

Drepanoistodus sp. cf. Drepanoistodus nowlani Ji & Barnes, 1994

Fig. 5G–P

Drepanoistodus sp. cf. Drepanoistodus nowlani Ji & Barnes. — Zhen et al., 2007b: 132–134, pl. 2, figs 1–21, pl. 3, figs 1–9 (cum syn.).

Material. 52 specimens from three samples ( Table 1).

Remarks. The Emanuel specimens are comparable with those described from the Honghuayuan Formation of Guizhou as D. sp. cf. D. nowlani except for the less extended basal-anterior corner in the P elements ( Fig. 5N–P ).

Figures

Fig. 5.A–F, Drepanodus arcuatus Pander, 1856.All from sample WCB705/133.A,B, Sa element; (A), CPC39811, lateral view (IY126-002); (B), CPC39812, lateral view (IY126-003). C,D, Sd element; (C), CPC39813, inner lateral view (IY127-028); (D), CPC39814, inner lateral view (IY127-022).(E), Pb element, CPC39815, innerlateral view (IY126-001).(F), Pa element, CPC39816,outer lateral view (IY126-005). G–P, Drepanoistodus sp. cf. D. nowlani Ji & Barnes, 1994. (G), M element, CPC39817, WCB705/243, anterior view (IY129-005). H,I, Sa element; (H), CPC39818, WCB705/133, lateral view (IY126-004); (I), CPC39819, WCB705/133, lateral view (IY127-016). (J), Sb element, CPC39820, WCB705/133, inner lateral view (IY127-029). K,L, Sc element; (K), CPC39821, WCB705/133, outer lateral view (IY126-008); (L), CPC39822, WCB705/133, outer lateral view (IY129-027). (M), Sd element, CPC39823, WCB705/133, inner lateral view (IY127-030). N,O, Pa element; (N), CPC39824,WCB705/243, inner lateral view (IY129-025); (O), CPC39825,WCB705/243, outer lateral view (IY129-026). (P), Pb element, CPC39826, WCB705/243, outer lateral view (IY129-006). Scale bars 100 µm.