Palaeozygopleura obesa n.sp.

PI. 16 figs 1-4

Palaeozygopleura sp. Yoo, 1988: 238, table 2.

Description. Shell small, high-spired cyrtoconoid, anomphalous. Protoconch of about 1Y2 smooth whorls, tending to be globose. Teleoconch of about 7 whorls with whorl profile of the upper surface flattened and the lower surface slightly convex; suture shallow, collabral ribs evenly spaced across the whorl and slightly opisthocyrt with transition from protoconch to teleoconch not distinct. Aperture incomplete (broken specimen).

Types. Holotype (F78477) and 2 figured paratypes (F78478 -9). There are 14 additional specimens (F78476) from the type locality.

Type locality. 150 m west of 'Marohn' homestead, on the Scone-Gundy roadside, 4 km south-west of Gundy, NSW (Locality 28).

Stratigraphic position. In bioclastic limestone, upper part of the Dangarfield Formation.

Additional material. 4 specimens from 'Rangari' area (Localities 15 and 18) and 26 from various horizons at Glenbawn (Localities 29-32).

Geographic distribution. 'Rangari' to Glenbawn.

Geological age. Middle to late Toumaisian.

Etymology. Derived from the Latin obesus meaning swollen.

Remarks. This is only species referred to Palaeozygopleura, characterised by its high-spired cyrtoconoid shell with smooth globose protoconch. With the additional specimens recovered between 'Rangari' and Glenbawn, Palaeozygopleura sp. Yoo (1988) is here named obesa .