Drepanoistodus basiovalis ( Sergeeva, 1963 )

Zhen, Yong Yi, 2011, Middle to Late Ordovician (Darriwilian-Sandbian) Conodonts from the Dawangou Section, Kalpin Area of the Tarim Basin, Northwestern China, Records of the Australian Museum 63 (3), pp. 203-266 : 222-224

Drepanoistodus basiovalis ( Sergeeva, 1963)

Fig. 12A–Q

Oistodus basiovalis Sergeeva, 1963: 96 , pl. 7, figs 6, 7, text-fig. 3.

Drepanoistodus basiovalis (Sergeeva) .– Lindström, 1971: 43, figs 6, 8; Löfgren, 1978: 55, pl. 1, figs 11–17, text-fig. 26B, C (cum syn.); An et al., 1985: pl. 13, figs 17–20; An, 1987: 145–146, pl. 9, figs 30–31; An & Zheng, 1990: 164, pl. 8, fig. 9; Ding et al. in Wang, 1993: 173, partim only pl. 12, figs 1–2, 4; Albanesi in Albanesi et al., 1998: 135, pl. 3, figs 15–18; Johnston & Barnes, 2000: 18, pl. 11, figs 10, 11, 15, 16 (cum syn.);?Zhen et al., 2003b: 191, fig. 14A–K; Zhen et al., 2007: pl. 1, figs 27–37.

Drepanoistodus suberectus (Branson & Mehl) .– Cooper, 1981: 164, pl. 26, figs 1, 2, 6.

Figures

Figure 12. A–Q, Drepanoistodus basiovalis (Sergeeva, 1963). A–B, M element; A, NIGP 152935, Nj378, anterior view (IY160-004), B, NIGP 152936, Nj378, posterior view (IY160-005). C–E, Sa element; C, NIGP 152937, Nj379, lateral view (IY160-039); D–E, NIGP 152938, Nj291, D, lateral view (IY158-008), E, basal view (IY158-011). F–H, Sb element; F–G, NIGP 152939, Nj379, F, inner lateral view (IY160-040), G, basal view (IY160-041); H, NIGP 152940, Nj378, outer lateral view (IY160-011)… (continued on facing page)