Gansuceratoikiscum Wang, Cheng & Zhang, 2010

Noble, Paula, Aitchison, Jonathan C., Danelian, Taniel, Dumitrica, Paulian, Maletz, Jörg, Suzuki, Noritoshi, Cuvelier, Jessie, Caridroit, Martial & O’Dogherty, Luis, 2017, Taxonomy of Paleozoic radiolarian genera, Geodiversitas 39 (3), pp. 419-502 : 424

Gansuceratoikiscum Wang, Cheng & Zhang, 2010

Gansuceratoikiscum Wang, Cheng & Zhang, 2010: 48 .

TYPE SPECIES. — Gansuceratoikiscum guanzhuangensis Wang, Cheng & Zhang, 2010 ( Wang et al. 2010: 473, pl. 1, fig. 11).

AGE AND LOCATION OF TYPE MATERIAL. — Sandbian, Upper Ordovician, Pingliang Formation, Gansu Province, China.

TAXON CODE. — 015.

STATUS. — Valid.

DIAGNOSIS. — “Six rod-like primary spines positioned in eccentric place. The pairs of caveal ribs are paired on the dorsal rod of the a-rod; The patagial tissue is present on one lateral side of the i-rod. A single row of arches (or by-spines) connect the primary spines, forming a simple cortical shell.”( Wang et al. 2010: 48).

REMARKS

This genus differs from Protoceratoikiscum in that it has a framework composed of 6 rods connecting to a median bar. Ceratoikisum has 3 rods (a, b, intersector) that cross to form a triangle. It differs from Protoceratoikiscum in that it possesses row of arches that connect the primary rods to form a subcircular shell, and the rods join in an eccentric position in Gansuceratoikiscum .