Ansella jemtlandica ( Löfgren, 1978 )

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 : 182

Ansella jemtlandica ( Löfgren, 1978)

Fig. 8K,L

Belodella sp. A Serpagli, 1974: 38,39, pl. 8, fig. 7, pl. 20, fig. 10.

Belodella jemtlandica Löfgren, 1978: 46–49, pl. 15, figs. 1–8, fig. 24A–D (cum syn.).

Belodella jemtlandica.– Cooper, 1981, pl. 26, fig. 14.

Ansella jemtlandica Fåhraeus & Hunter, 1985: 1173–1175 , pl. 1, figs. 1–5, 9, pl. 2, fig. 12a,b, text-fig. 1 (cum syn.).

Ansella jemtlandica .–Albanesi, in Albanesi et al., 1998: 160, pl. 1, figs. 18–23, text-fig. 27 (cum syn.).

Material. Four specimens ( Sa elements ) from the Tabita Formation at Mount Arrowsmith, and an additional specimen (Sa) from the unnamed dolomitic limestone unit at Koonenberry Gap.

Remarks. This species is rare in our collections, only the symmetrical Sa element being recovered. It has a proclined cusp, an anterolateral costa on each lateral side, and a thin posterior margin basally bearing a row of small, closely spaced denticles. The specimen illustrated from the Horn Valley Siltstone ( Cooper, 1981) is a weakly asymmetrical, acostate Sc element of the same species.