Radiolarians of the Class Stauraxonaria from the Late Carboniferous–Middle Permian: Nazarovispongus Kozur sensu Kozur et Mostler, restituo et emend. nov. and a New Genus Kozurispongus gen. nov

An analysis of the morphological features of the radiolarian skeletons of the class Stauraxonaria from the Late Carboniferous and Early Permian of the South Urals of Russia and the Western Mugodzhary of Kazakhstan, as well as the Middle Permian of Western Texas in the United States made it possible...

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Bibliographic Details
Published in:Paleontological journal 2021-05, Vol.55 (3), p.244-258
Main Author: Afanasieva, M. S.
Format: Article
Language:English
Subjects:
Carboniferous
Community composition
Earth and Environmental Science
Earth Sciences
New genus
New species
Paleontology
Permian
Species composition
Spines
Stauraxonaria
Taxonomic revision
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Summary:An analysis of the morphological features of the radiolarian skeletons of the class Stauraxonaria from the Late Carboniferous and Early Permian of the South Urals of Russia and the Western Mugodzhary of Kazakhstan, as well as the Middle Permian of Western Texas in the United States made it possible to reinstate the genus Nazarovispongus Kozur, 1980 and revise the systematic position of the species N. pavlovi and N. permicus established by Kozur (1980). The diagnosis of the reinstated genus Nazarovispongus Kozur, 1980 sensu Kozur et Mostler, 1989, restituo et emend nov. is emended, and the species composition is expanded to include six species: N. pavlovi Kozur, 1980 (type species), N. aequilateralis (Nazarov in Isakova and Nazarov, 1986, comb. nov.), N. delicatus (Nazarov et Ormiston, 1985, part., comb. nov.), N. globosus Nestell et Nestell, 2010, N. inflatus (Nazarov et Ormiston, 1985, comb. nov.), and N. subrotundus (Nazarov in Isakova and Nazarov, 1986, comb. nov.). A new genus Kozurispongus gen. nov. is described, to accommodate six species: K. aktastiensis (Nazarov et Ormiston, 1993, comb. nov.), K. circumfusus (Nazarov et Ormiston, 1985, comb. nov.), K. permicus (Kozur, 1980, comb. nov.), K. semilaminus (Nazarov in Isakova and Nazarov, 1986, part., comb. nov.), and two new species K. concavilatus sp. nov. and K. rotundatus sp. nov. A new scheme of sequential stages of the formation of skeletal spines is proposed.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030121030023