Triactofenestrella Nazarov & Ormiston, 1984

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 : 461

Triactofenestrella Nazarov & Ormiston, 1984

Triactofenestrella Nazarov & Ormiston, 1984: 79 .

TYPE SPECIES. — Triactofenestrella nicolica Nazarov & Ormiston, 1984 ( Nazarov & Ormiston 1984: 79, pl. 5, fig. 4-5).

AGE AND LOCATION OF TYPE MATERIAL. — Upper Carboniferous Gzhelian, south Urals.

TAXON CODE. — 178.

STATUS. — Junior synonym of Latentibifistula Nazarov & Ormiston, 1983 (by De Wever et al. 2001).

DIAGNOSIS. — “Очень крупные Latenofistulidae,имеющие пористую внутреннюю сферу. Под углом 120° от нее отходят 3 массивных внутренних луча,пронизанных порами.В свою очередь перекладины, отходящие от узлов межпоровой решетки, разветвляются и, соединяясь между собой, образуют сетчато-губчатую внешнюю оболочку”.( Nazarov & Ormiston 1984: 79).

DIAGNOSIS (English translation by J. P. Caulet – RadWorld database). — “Very large Polycystine with an internal porous sphere, from which diverge at angles of 120° three robust perforated rays. From them (at the nodes of the inter-pore frames) originate robust bars that branch and merge to constitute the external envelope of the triangular shell.”

REMARKS

In their summary statement about Triactofenestrella Nazarov & Ormiston (1984: 87) write that it “is distinguished by its rather large inner sphere (up to 110 µm, rather than 45 to 50 µm as in other Latentifistulid genera).” The dimensions of the inner sphere for the type species of Latentibifistula were not given in order to substantiate this difference, but comparison of external morphology shows the type species for each genus to by quite comparable in size, shape, width of arms and of the exterior layer. De Wever et al. (2001) consider this genus to be a junior synonym to Latentibifistula .