Naticopsis (Naticopsis) minuta, 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 : 82

Naticopsis (Naticopsis) minuta n.sp.

PI. 14 Figs 9-12

Description. Shell minute, globular, neritiform, anomphalous. Protoconch of about ll1z smooth whorls, apex bulbous. Teleoconch of about 211z, convex whorls, suture with whorls adpressed, surface ornamented with fine collabral threads, whorl embracing much of previous whorl. Aperture convex, lenticular in shape; columella lip slightly thickened, arched; inner lip and outer lip thin.

Types. Holotype ( F78463 ) and 1 figured paratype ( F78464 ). There are 50 unfigured additional specimens ( F78462 ) from the type locality.

Type locality. Behind 'Kyndalyn' homestead, 10 km south-west of Somerton, NSW (Locality 24).

Stratigraphic position. In base of oolitic limestone in the Kyndalyn Mudstone Member of the Merlewood Formation.

Geographic distribution. Type locality only.

Geological age. Middle or late Visean.

Etymology. Derived from the Latin minutus meaning little, small.

Remarks. This is a small shell with a thin callus, commonly occurring in the type locality.

Figures

Plate 1. Figs 1-3. Euphemites pustula n.sp. 1. Paratypes, left lateral view, maximum diameter 3.4 mm (F78342). 2. Holotype, left lateral view, maximum diameter 4.6 mm (F78341). 3. Paratype, apertural view, maximum diameter 4.2 mm (F78342). Locality 25. Fig. 4. Cybularia carinata n.sp. Holotype, apertural view, maximum diameter 2.3 mm (F78343). Locality 25. Figs 5-8. Bellerophon (Bellerophon) swainsensis n.sp. 5. Paratype, anterior dorsal view 6.0 mm x 6.4 mm (F78345). 6. Paratype, apertural view 5.3 mm x 5.6 mm (F78346a). 7. Holotype, apertural view 5.7 mm x 5.4 mm (F78344). 8. Paratype, left lateral view 4.0 mm x 6.4 mm (F78346b). Locality 25. Figs 9-12. Bellerophon (Bellerophon) kyndalynensis n.sp. 9. Holotype, anterior dorsal view 1.2 mm x 1.2 mm (F78348). 10. Paratype, right lateral view, largest diameter, 1.5 mm (F78349b). 11. Paratype, apertural view 1.2 mm x 1.4 mm (F78349a). 12. Se1enizone of Fig. 9. Locality 24. Bar scale 0.1 mm.