Thecentactinia Nazarov, 1975

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 : 448-449

Thecentactinia Nazarov, 1975

Thecentactinia Nazarov, 1975b: 71 .

TYPE SPECIES. — Entactinosphaera riedeli Foreman, 1963 ( Foreman 1963: 275, pl. 5, fig. 4a-c, pl. 6, fig. 9).

AGE AND LOCATION OF TYPE MATERIAL. — Upper Devonian, Kazakhstan.

TAXON CODE. — 126.

STATUS. — Junior synonym of Entactinosphaera Foreman, 1963 (by Won 1997a).

DIAGNOSIS. — “Три сферические решетчатые оболочки,связанные с внутренней шестилучевой спикулой посредством тонких лучей, образующихся от ее концов”. ( Nazarov 1975b: 71).

DIAGNOSIS (English translation of Nazarov [1975b] by E. Roden – in the rad database microfiche collection of Bill Riedel). — “Three spherical latticed shells, connected to the inner six-rayed spine by means of thin rays, which are formed at its ends”.

DIAGNOSIS [English translation by J. P. Caulet – RadWorld database]. — Internal structure as a six-rayed spicule with thin rays emanating from a median bar (6-8 µm long). Three envelopes. Internal envelope, mostly porous, of a diameter 35-55 µm; intermediate envelope, lattice, rarely porous, of a diameter 85-105 µm; external envelope, with small pore, rarely lattice. Six external main spines, rarely less, from one to five.

REMARKS

Won (1997a) discusses this genus and comments that it is unclear whether it and Entactinosphaera are synonyms (she spells its name as Thecoentactinia following the spelling error of Nazarov & Ormiston [1990], who follow the first spelling of the name of this genus when introduced as a nomen nudum in Nazarov [1975a: 39]). Shortly after, Nazarov fully described the genus in his opus on radiolarians from Kazahkstan ( Nazarov 1975b: 71).