Serpulospira scalariformis, 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 : 73

publication ID	https://doi.org/ 10.3853/j.0067-1975.46.1994.18
DOI	https://doi.org/10.5281/zenodo.4660805
persistent identifier	https://treatment.plazi.org/id/03EB87C3-8618-6B3E-FE77-8BBAF8F6FBCA
treatment provided by	Felipe
scientific name	Serpulospira scalariformis
status	sp. nov.

Treatment

'Serpulospira' scalariformis View in CoL n.sp.

PI. 2 figs 8-10, PI. 3 figs 1-5

Description. Shell minute, openly coiled. Protoconch bulbous, smooth, curved; margin with teleoconch sharp and distinct. Teleoconch openly coiled, in early whorls with asymmetric spire tending to be symmetric with contact between spires in later whorls; nearly smooth but growth lines distinct throughout, aperture rounded.

Dimensions.		MD	DA
Holotype	( F78360 View Materials )	2.3mm	0.8mm
Paratypes ( F78357 View Materials )		2.8	1.0
	( F78359 View Materials )	2.1	0.6
	( F78361 View Materials )	2.9	TODO
	( F78362 View Materials )	1.3	0.3
	( F78358 View Materials a)	1.4	0.4
	( F78358 View Materials b)	1.3	0.4

Dimensions. H	W	PA	NW
Holotype ( F78363 View Materials ) 2.2 mm Paratypes ( F78364 View Materials a)1.9 ( F78364 View Materials b)2.3	1.2 mm TODO 1.4	1500 TODO 145	TODO 31/1 5

Types. Holotype ( F78360 View Materials ) and 6 figured paratypes ( F78357 View Materials -9, F78361 View Materials -2). There are 48 unfigured additional specimens ( F78390 View Materials ) from the type locality.

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

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

Additional material. 10 specimens from Oxley Highway (Locality 22-2), 3 from south-east of 'Rangari' (Locality 18) and 2 from Glenbawn (Locality 30).

Geographic distribution. 'Rangari' to Glenbawn.

Geological age. Middle to late Tournaisian.

Etymology. Referring to disjunct whorls.

Remarks. The bulbous and smooth protoconch of 'Serpulospira' scalariformis n.sp. is similar to that of hyoliths. The difference is that the protoconch of this species is curved. The nature of spire and growth lines on the teleoconch suggest that the species could be referred to the macluritoidean gastropods proposed by Linsley (l978a). The species is tentatively placed in the Euomphaloidea, but that is considered problematic by Bandel (personal communication).