Rhabdotocochlis turgida, 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 : 81

Rhabdotocochlis turgida n.sp.

PI. 11 figs 1-10

Dimensions. H	W	PA	NW
Holotype ( F78425 ) 5,4 mm Paratype ( F78426 )2.7	3.6 mm 2.2	60° 65	5 4Yz

Description. Shell very small, medium-spired turbiniform, coeloconoid, narrowly phaneromphalous. Protoconch of 11,4 smooth whorls, and a rather flat apex. Teleoconch whorl profile gently arched between sutures, rounded on the final whorl, sutures moderately deep, spiral lirae rising gradually on the second whorl, then becoming gradually stronger; 18 lirae between sutures, shell consisting of two layers. Aperture with straight inner lip thickened, slightly reflexed; outer lip orthocline.

Types. Holotype ( F62002 ) 3 figured paratypes ( F78429 - 30) and 12 unfigured paratypes ( F78433 ) .

Type locality. 1.8 km east from the southern end of Glenbawn Dam wall, 13 km north-east of Aberdeen, NSW (Locality 30) .

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

Additional material. 6 specimens from south-east of 'Rangari' (Locality 18), and 10 from various horizons at Glenbawn (Locality 31).

Geographic distribution. 'Rangari' to Glenbawn.

Geological age. Middle to late Tournaisian.

Etymology. Derived from the Latin turgidus meaning swollen, referring to the inflated last whorl.

Remarks. Rhabdotocochlis turgida n.sp. differs from Araeonema microspirulata in having a larger and thicker shell consisting of two layers, and coarser spiral lirae, and from the type species, Rhabdotocochlis rugata Knight , in having the more inflated last whorl and finer spiral lirae.