Gracilentactinia Kozur & Mostler, 1989

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 : 441

Gracilentactinia Kozur & Mostler, 1989

Gracilentactinia Kozur & Mostler, 1989: 192 .

TYPE SPECIES. — Gracilentactinia gracilis Kozur & Mostler, 1989: 192 , pl. 6, fig. 7-9, pl. 8, fig. 5.

AGE AND LOCATION OF TYPE MATERIAL. — Sakmarian-Artinskian (Lower Permian), Cis-Urals, Russia.

TAXON CODE. — 093.

STATUS. — Valid.

DIAGNOSIS. — “Von einem Spicularsystem in einer winzigen Markschale gehen 6-8 wuchtige scharfkantige Hauptstacheln aus, die zunächst immer breiter, dann wieder schmaler werden. Etwa an ihrer breitesten Stelle zweigen von den Kanten Apophysen ab, die den Ausgangspunkt eines sehr lockeren Schalen-ähnlichen Geflechtes bilden. Von den Kreuzungspunkten der Gitterbalken strahlen nadelförmige Stacheln nach innen, niemals jedoch nach aussen.” ( Kozur & Mostler 1989: 192).

DIAGNOSIS (English translation by J. P. Caulet – RadWorld database – modified by Jörg Maletz). — 6-8 strong, sharp-sided main spines that initially widen from their bases and then become progressively thinner towards their distal ends originate from the inner spicule located inside a very small medullary shell. Approximately on their widest points, apophyses branch out from the sides of the spines and form the basis of a spongy, shell-like meshwork. From the nodal points of the meshwork, needle-shaped spines are directed inwards, never outwards.