Tetracircinata Nazarov & Ormiston, 1984 sensu Nazarov (1988)

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 : 469

Tetracircinata Nazarov & Ormiston, 1984 sensu Nazarov (1988)

Tetracircinata Nazarov & Ormiston, 1984: 74 . — Nazarov 1988: 66.

TYPE SPECIES. — Tetracircinata reconda Nazarov & Ormiston, 1984 ( Nazarov & Ormiston 1984: 74; pl. 5, fig. 1-3, holotype never figured, paratype pl. 5, fig. 2).

AGE AND LOCATION OF TYPE MATERIAL. — Artinskian, Lower Permian, Southern Urals, Russia.

TAXON CODE. — 206.

STATUS. — Junior synonym of Tetragregnon Ormiston & Lane, 1976 (by De Wever et al. 2001).

DIAGNOSIS. — “Губчатые Heplentactiniidae, внутренний каркас которыхпредставленчетырехлучевойспикулой.Еелучипостепенно переходят в массивные иглы с неравномерным расположением апофизов их дальнейшее ветвление и соединение друг с другом образует несколько замкнутых или полузамкнутых внутренних оболочек”. ( Nazarov & Ormiston 1984: 74).

DIAGNOSIS (English translation by J. P. Caulet – RadWorld database). — “Internal structure represented by a spicule with only four rays. At a distance of 30-40 µm from the center, the rays from the spicule become more robust and develop in their proximal parts groups of irregularly developed apophyses, that merge to each other to form a somewhat closed, or half-closed, internal envelope. Sometimes an external coarsely spongy layer with small meshes. 4, sometimes 2-3, external conical spines, rarely rod-like with angular bases.”

REMARKS

See Nestell & Nestell (2010) for a discussion of this genus and its inclusion as a junior synonym under Tetragregnon , as proposed by De Wever et al. (2001)