Wellsotrochus discus Squires, 1962

Baron-Szabo, Rosemarie C., 2008, Dendrophylliina, Caryophylliina, Fungiina, Microsolenina, and Stylinina, Zootaxa 1952, pp. 1-244 : 94-95

Wellsotrochus discus Squires, 1962

Fig. 18

v*1962 Wellsotrochus discus , n. sp.: Squires, p. 146, pl. 1, figs 6–8.

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

Dimensions. d=9.4–11.7 mm; s=48; h=up to 5 mm.

Description. Solitary, bowl-shaped to discoidal; circular to elliptical in outline; costosepta arranged in 4

cycles in 6 systems, alternating in length and thickness.

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

Text-Fig. 18 A, Wellsotrochus discus Squires, 1962 , holotype, Co 1303, based on the illustrations in Squires (1962), cross view, polished surface, Campanian-Maastrichtian of New Zealand, scale bar: 5 mm. B, Wellsotrochus discus Squires, 1962 , paratype, Co 1304, based on the illustrations in Squires (1962), longitudinal view, Campanian-Maastrichtian of New Zealand, scale bar: 4 mm. C-F, Wellsotrochus cyathiformis ( Squires, 1958) . C, Lower Danian of Denmark ( Greenland) as illustrated in Floris (1972, figured as type material of Kangiliacyathus groenlandicus Floris, 1972 ), scale bar: 2 mm. D, holotype of Wellsotrochus cyathiformis ( Squires, 1958) , AUG 9a, Campanian-Maastrichtian (Haumurian) of New Zealand, base of specimen, oblique, scale bar: 2.5 mm (photograph courtesy S. Cairns); E, F, Maastrichtian of