Murchisonia, d'Archiac & de Verneuil, 1841

Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, Records of the Australian Museum 46 (1), pp. 63-120 : 83

Murchisonia sp.

PI. 16 fig. 5

Description. Shell small, high-spired turreted form, thick, anomphalous or possibly with pseudoumbilicus. Protoconch unknown. Teleoconch of about 8 whorls; whorl profile angular at the periphery, but straight between pseudosuture and selenizone, and between selenizone and lower suture. Selenizone narrow, smooth on the periphery between 2 lirae. Aperture broken, pentagonal in shape with outer lip angled.

Dimensions. Figured specimen ( F78482 ): H 5.8 mm, W 3.1 mm, PA 30 °, NW 71 h

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

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

Additional material. 4 specimens from the same locality .

Geographic distribution. 'Marohn'.

Geological age. Late Tournaisian.

Remarks. The species is characterised by a tall-spired and angular whorl with a selenizone on the periphery, resulting in a pentagonal shaped aperture. Specimens recovered are usually poorly preserved with the protoconch missing.