Acodus deltatus? Linström, 1955

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 deltatus? Linström, 1955

Fig. 4S–X

Acodus deltatus deltatus Linström. — McTavish, 1973: 39, pl. 1, figs 1–9, 12–14, text-fig. 3p–t.

Material. 209 specimens from three samples ( Table 1).

Remarks. By assigning the Emanuel material to Acodus deltatus Lindström, 1955 , McTavish (1973) defined A. deltatus as having a seximembrate apparatus. However, in a later revision of this Baltic species, Bagnoli et al. (1988) suggested that only some illustrated specimens referred to A. deltatus deltatus by McTavish (1973) might be doubtfully assignable to A. deltatus . Stouge & Bagnoli (1999) further indicated that the Emanuel material referred to A. deltatus was not conspecific with the type specimens from Sweden. As revision of the Acodus species described by McTavish (1973) and other related coniform taxa occurring in the Emanuel Formation is still in progress and will be presented elsewhere, the currently material is only tentatively referred to A. deltatus .

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]