Knightites (Retispira) multilirata, 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 : 72

Knightites (Retispira) multilirata n.sp.

PI. 2 figs 4-7

Description. Shell small, isostrophic, widely phaneromphalous. Protoconch concealed. Teleoconch with whorl profile depressed, involute, broadly rounded across dorsum but becoming more sharply rounded laterally, then turning into a wide umbilicus; ornament reticulate, consisting of a large number of fine, sharp spiral and transverse lirae with small nodes developed at intersections; selenizone moderately wide, flush with the shell surface, ornamented by 4 central spiral lirae flanked with 2 weaker spiral lirae on both sides; curved lunulae numbering twice the transverse lirae; shell consisting of 2 layers. Aperture broadly crescentic; lips thickened, flared; slit probably obscured by thickening; parietal inductura thickened for almost a half of a volution.

Dimensions.	MD	TS
Holotype ( F78351 )	7.3mm	8.6mm
Paratype ( F78352 )	6.4	7.1

Dimensions.	MD	TS
Holotype ( F78353 )	5.2mm	7.0mm
Paratypes ( F78354 )	5.3	6.1
( F78355 )	6.3	TODO

Types. Holotype ( F78353 ) and 2 figured paratypes ( F78354 -5).

Type locality. About 250 m west of Babbinboon Lane, in Swains Gully, 15 km south-west of Somerton, NSW (Locality 25).

Stratigraphic position. In bioclastic limestone, 130 m above the base of the Namoi Formation.

Additional material. 2 specimens from the type locality.

Geographic distribution. Swains Gully.

Geological age. Middle Tournaisian.

Etymology. Referring to the multiple lirae of the shell.

Remarks. This species differs from Knightites (R.) culleni Campbell & Engel and Knightites (R.) triangularis n.sp. by having a wide and deep umbilicus, depressed whorls and neat reticulate ornamentation.