Wellsotrochus cyathiformis ( Squires, 1958 )

Baron-Szabo, Rosemarie C., 2008, Dendrophylliina, Caryophylliina, Fungiina, Microsolenina, and Stylinina, Zootaxa 1952, pp. 1-244 : 94

Wellsotrochus cyathiformis ( Squires, 1958)

Text-Fig. 18

v*1958 Wellsia cyathiformis n. sp.: Squires, p. 57, pl. 10, figs 16–20.

1962 Wellsotrochus cyathiformis (Squires) : Squires, p. 145.

1962 Wellsotrochus conicus , n. sp.: Squires, p. 145, pl. 3, figs 6–7.

1972 Kangiliacyathus groenlandicus gen. n. & sp. n.: Floris, p. 67, pl. 4, figs 2A–3.

v1994 Levicyathus cairnsi n. sp.: Filkorn, p. 60, figs 20 (1–4).

v1997 Levicyathus cairnsi Filkorn, 1994 : Cairns, p. 18, figs 2d and 5a.

1997 Wellsotrochus cyathiformis ( Squires, 1958) : Cairns, p. 21, fig. 2j.

1997 Wellsotrochus conicus Squires, 1958 : Cairns, p. 22.

2000 Levicyathus cairnsi, Filkorn 1995 : Löser, p. 48.

2000 Wellsotrochus cyathiformis, Squires 1958 : Löser, p. 86.

2002 Wellsotrochus cyathiformis ( Squires, 1958) : Baron-Szabo, p. 175, text-fig. 74.

v2002 Levicyathus cairnsi Filkorn, 1994 : Baron-Szabo, p. 176, pl. 122, figs 5–6.

Dimensions. d (min)=3.5– 8 mm; d (max)=5–9.5 mm; d (min)/d (max)=0.61–1; s=24–48+s5; h=3–6.3 mm.

Description. Solitary, variably conical or bowl-shaped to discoidal; circular to elliptical in outline; costosepta arranged in 3 to 4 cycles in 6 systems; septa of a beginning fifth cycle in largest specimens present.

Type locality of species. Campanian-Maastrichtian (Haumurian) of New Zealand .

Distribution. Campanian-Maastrichtian of New Zealand, Maastrichtian of Antarctic Peninsula, Lower Danian of Denmark ( Greenland).