Cyrtisphaeractenium Deflandre, 1972

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 : 473

Cyrtisphaeractenium Deflandre, 1972

Cyrtisphaeractenium Deflandre, 1972b: 14 ; 1960: 216 (nomen nudum).

TYPE SPECIES. — Cyrtisphaeractenium mendax Deflandre, 1960 ( Deflandre 1960: 216, pl. 1, fig. 19, nomen nudum); Deflandre 1972a: 3535, pl. 1, fig. 5-11, pl. 2, fig. 4-5, pl. 3, fig. 1-6; 1972b: 15.

AGE AND LOCATION OF TYPE MATERIAL. — Visean (Lower Carboniferous), Cabrières, Hérault, Montagne Noire, France.

TAXON CODE. — 222.

STATUS. — Valid.

DIAGNOSIS. — “Céphalis sphérique perforé avec des pores arrondis, largement espacés et peu nombreux, muni de quatre cornes costulées dont l’une est toujours courte et conique et deux autres grandes et non apicales. Ouverture large à bord portant une collerette épaissie, de laquelle partent de longues pointes rapprochées en dents de peigne, avec un podome formé de trois longues cornes tricostulées, droites ou un peu courbées, entre lesquelles subsistent des vestiges souvent très réduits de l’appareil pectiné. Système trabéculaire interne connu seulement par quelques vestiges en tigelles grêles, issues de la base des cornes et franchement dirigées vers le centre.» ( Deflandre 1972b: 14).

DIAGNOSIS (English translation by Taniel Danelian). — Cephalis spherical, perforated by rounded pores that are not numerous and well-spaced, bearing four costate horns one of which is always short and conical, the two others are large and not apical. The opening is large and bears a thick collar, from which long spikes extend, they are brought together in the form of brush, with a podome that is formed by three long tri-bladed horns, which are straight or slightly curved, through which exist the remains of a pectinate (parallel-ridged) apparatus. The internal spicular (trabecular) system is known only from some remains with slender stalks extending from the base of the horns and truly directed towards the center.

ABRIDGED DESCRIPTION (translated from Deflandre [1972b] by J. P. Caulet). — See also Holdsworth (1973).