Spongentactinia 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 : 447

Spongentactinia Nazarov, 1975

Spongentactinia Nazarov, 1975b: 75 .

TYPE SPECIES. — Spongentactinia fungosa Nazarov, 1975 ( Nazarov 1975b: 75, pl. 11, fig. 6).

AGE AND LOCATION OF TYPE MATERIAL. —Upper Devonian, Frasnian stage, Egindtnskaya series, Southern Urals, Northern Mugodzhars, Aitpaika River, Russia.

TAXON CODE. — 121.

STATUS. — Valid.

DIAGNOSIS. — “Внешняяоболочкараковиныгубчатая,внутренняя– решетчатая, заключающая внутреннюю четырех – шестилучевую спикулу. Внутренняя оболочка соприкасается с губчатым сnоем или находится на некотором расстоянии от него” ( Nazarov 1975b).

DIAGNOSIS (English translation of Nazarov [1975b] by E. Roden – in the rad database microfiche collection of Bill Riedel). — The outer shell of the skeleton is spongy, the inner shell is latticed and includes the inner four- to six-rayed spicule. The inner shell is adjacent to the spongy layer or lies at a certain distance from it.

REMARKS

This species differs from Tetrentactinia Foreman, 1963 by the occurrence of an internal latticed shell. Apparently, to this genus can be related Entactinia spongites Foreman, 1963 , E. somphorohis Foreman, 1963 , E. exilispina Foreman, 1963 , and E. manalloea Foreman, 1963 , that have a thick spongious layer on top of a thin latticed base, as well as Entactinosphaera ? diplostraca Foreman, 1963 with an internal latticed shell slightly separated from the spongious layer can be related to this genus.