Pseudoaclisina microspirulata, Yoo, 1994

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 : 92

Pseudoaclisina microspirulata n.sp.

PI. 21 figs 7-10

Description. Shell minute, high-spired, pupiform, anomphalous. Protoconch of llh smooth whorls, deviated and submerged, transition from protoconch to teleoconch abrupt. Teleoconch of about 7 whorls with about 22 fine spiral costae in the final whorl; opisthociine growth lines cover the teleoconch; whorl profile more or less symmetrically rounded; suture deep, well impressed; base rounded. Aperture oval, columellar lip arcuate; outer lip, thin, opisthociine.

Types. Holotype ( F78519 ) and 1 figured paratype ( F78520 ).

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

Geographic distribution. Type locality only.

Geological age. Late Tournaisian.

Etymology. Referring to the microspiral ornamentation of shell.

Remarks. This form is characterised by densely spaced fine spiral lirae and a deviated protoconch.

Pseudoaclisina turgida (Y00)