Acodus, Pander, 1856

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 : 11

Acodus ? transitans McTavish, 1973

Fig. 4M–R

Acodus transitans McTavish, 1973: 41 , 42, pl. 1, figs 10, 11, 15, 17, 19, 21, 24, text-fig. 3 m –o.

Material. Four specimens from three samples WCB 705/133 ( Table 1).

Remarks. Acodus transitans is characterized by having a number of small and rudimentary denticles on the posterior process of its P and S elements, and represents a transitional form between Acodus and Prioniodus . Only a small number of specimens were available in this study ( Fig. 4M–R ). A comprehensive revision of Acodus species from the Emanuel Formation will be undertaken in a separate contribution.

Figures

Fig. 4.A–F, Bergstroemognathus extensus (Graves & Ellison, 1941).All from sample WCB705/243.(A), M element, CPC39790,posterior view (IY116-046). (B), Sa element, CPC39791, posterior view (IY116-047).(C), Sb element, CPC39792, inner lateral view (IY116-048). (D), Sc element, CPC39793, inner lateral view (IY116-049).(E), Pb element, CPC39794, inner lateral view (IY116-042).(F), Pa element, CPC39795, inner lateral view (IY116-043). G–L, Cornuodus sp. All from WCB705/243; …[continued on facing page]