Cupitheca holocyclata ( Bengtson, 1990 )

Skovsted, Christian B. & Peel, John S., 2007, Small shelly fossils from the argillaceous facies of the Lower Cambrian Forteau Formation of western Newfoundland, Acta Palaeontologica Polonica 52 (4), pp. 729-748 : 738

Cupitheca holocyclata ( Bengtson, 1990)

Fig. 5D, E.

1990 Actinotheca holocyclata sp. nov.; Bengtson in Bengtson, Conway Morris, Cooper, Jell, and Runnegar, 1990: 204, figs. 134–136.

2001 Cupittheca holocyclata (Bengtson in Bengtson, Conway Morris, Cooper, Jell, and Runnegar, 1990); Demidenko in Gravestock et al. 2001: 97, pl. 9: 1a, b.

2003 Cupitheca holocyclata (Bengtson in Bengtson, Conway Morris, Cooper, Jell, and Runnegar, 1990); Wrona 2003: 200, fig. 11A–F, G 3.

2004 Cupitheca holocyclata (Bengtson in Bengtson, Conway Morris,

Cooper, Jell, and Runnegar, 1990); Malinky and Skovsted 2004:

569, fig. 12A–E.

Holotype: SAMP30845 , Parara Limstone, Hose Gully, Stansbury Basin , South Australia.

Type species: Paragloborilus mirus He, 1977 .

Material.—NFM−697, NFM−698, and two additional specimens from sample JSP1982−01.

Discussion.—Decollate tubular fossils are common constituents of many Lower and Middle Cambrian small shelly fossil assemblages from across the world (see review in Malinky and Skovsted 2004). Most specimens illustrated in the literature appear to represent internal moulds of limited diagnostic quality, but specimens with the external shell preserved have been described from Australia ( Bengtson et al. 1990), Antarctica ( Wrona 2003) and Greenland ( Malinky and Skovsted 2004). The material from the Forteau Formation of western Newfoundland includes specimens with preserved external shell surfaces ornamented by narrow, densely spaced and slightly undulating growth−lines comparable to the widespread species Cupitheca holocyclata Bengtson, 1990 .

Stratigraphic and geographic range.—Lower Cambrian of South Australia, Antarctica (glacial erratics on King George Island), North−East Greenland and western Newfoundland.