New taxa of the superorder Spirillinoida (Foraminifera)

V.I. Mikhalevich & M.A. Kaminski

Abstract. A new recent foraminiferal genus, Raskiniella gen. nov., with the type species Spirillina plana Wiesner, 1931, belonging to the family Raskiniellidae fam. nov., order Raskiniellida ord. nov. (subclass Spirillinana: superorder Spirillinoida), is described based on samples from Antarctica. The new genus is characterised by a complex canal system that has not been previously described in any other subclasses of multichamber foraminifera with a canal system. Canals extend inside the shell wall and are partly visible as a network on the wide peripheral margin of the shell. On the dorsal surface, these canals are radially arranged, resembling ribs, and extend perpendicularly to the chamber volutions towards the centre but do not reach it. A unique feature of the described canal system is the presence of smaller canals within larger ones; sometimes internal canals can be of third or even fourth order. The majority of the canals are located within the wall of the tubular chamber, forming a network of irregularly branching tubes that frequently intertwine, varying in shapes and sizes, often with swellings. It is the collective mass of these canals that constructs the framework of the shell. The round openings with a slightly projecting outer margin, located on the ventral side of the shall, previously described as pores in S. plana, are actually the external openings of the canal system and function as additional apertures. Since the type species of Spirillina Ehrenberg, 1843, S. vivipara Ehrenberg, 1843, like apparently all other or most species of the genus, does not possess a canal system, S. plana is transferred to the new genus, which is placed in the subclass Spirillinana.

Key words: systematics, shell ultrastructure, unique canal system, additional apertures, Foraminifera, Spirillinana, Spirillinoida, Raskiniellida, Raskiniellidae, Raskiniella, new taxa

Zoosystematica Rossica, 2024, 33(1): 48–64 ▪ Published online 27 April 2024

https://doi.org/10.31610/zsr/2024.33.1.48 ▪ Open full article

References

Azbel A.Ja. 1986. New Foraminifera of the Oxford of the Russian Platform. Paleontologicheskiy Journal, 1: 27–32. (In Russian).

Heron-Allen E. & Earland A. 1932. Foraminifera, Part 1. The ice free area of the Falkland Islands and adjacent seas. Discovery Reports, 4(1):291–460.

Hottinger L. 1976. An early umbilical canal system in Trocholina schouberti n. sp. from the Lower Cretaceous of North Eastern Morocco. Eclogae geologicae Helvetiae, 69 (3): 815–820.

Hottinger L. 1978. Comparative anatomy of elementary shell structures in selected larger Foraminifera. In: Hedley R.H. & Adams C.G. (Eds). Foraminifera, 3: 203–206. London: Academic Press.

Lipps J.A., Delaca T.E., Krebs W. & Stockton W. 1972. Shallow-water Foraminiferal studies, Antarctic Peninsula, 1971–1972. Antarctic Journal US, 7(4): 82–83.

Majewski W. 2005. Benthic foraminiferal communities: distribution and ecology in Admiralty Bay, King George Island, West Antactica. Polish Polar Research, 26: 159–214.

Majewski W. 2010. Benthic Foraminifera from the West Antarctic fiord evironments: an overview. Polish Polar Research, 31: 61–82. https://doi.org/10.4202/ppres.2010.05

Majewski W. 2013. Benthic foraminifera from the Pine Island and Ferrero bays. Amundsen Sea. Polish Polar Research, 34: 169–200. https://doi.org/10.2478/popore-2013-0012

Majewski W., Szzczuciński W. & Gooday A.J. 2023a. Foraminiferal census data for the 63–125 µm fraction of diverse environments of sub-Antarctic fjords, South Georgia. PANGAEA. https://doi.pangaea.de/10.1594/PANGAEA.954898

Majewski W., Szzczuciński W. & Gooday A.J. 2023b. Benthic foraminifera (stained) in sub-Antarctic fjords of South Georgia. PANGAEA. https://doi.pangaea.de/10.1594/PANGAEA.954898

Mantzurova V.N. & Gorbatchik T.N. 1982. New data on the shell structure of trocholins. Voprosy mikropaleontologii, 2: 116–129. (In Russian).

Mikhalevich V.I. 1992. Makrosistema foraminifer [The macrosystem of Foraminifera]. Thesis of Doctor of sciences (biology) dissertation. St Petersburg: Zoological Institute of the Russian Academy of Sciences. 43 p. (In Russian).

Mikhalevich V.I. 2000. The phylum Foraminifera d’Orbigny, 1826 – Foraminifers. In:Alimov A.F. (Ed.). Protisty: Rukovodstvo po zoologii [Protists. Manual on zoology], 1: 533–623. St Petersburg: Nauka Publishers. (In Russian, with English summary).

Mikhalevich V.I. 2004. The general aspects of the distribution of Antarctic foraminifera. Micropaleontology, 50(2): 179–194, 5 pls. https://doi.org/10.2113/50.2.179

Mikhalevich V.I. 2008. Chapter 5. General evolutionary regularities of organic and social life. In: Pontarotti P. (Ed.). Evolutionary biology from concept to application, 1: 73–94. Berlin – Heidelberg: Springer-Verlag. https://doi.org/10.1007/978-3-540-78993-2_5

Mikhalevich V.I. 2009. Fauna of foraminifera of Antarctic. Problemy Arktiki i Antarktiki, 3: 64–73. (In Russian).

Mikhalevich V.I. 2013a. New insight into the systematics and evolution of the foraminifera. Micropaleontology, 59(6): 493–527. https://doi.org/10.47894/mpal.59.6.01

Mikhalevich V.I. 2013b. Post-Cambrian testate foraminifera as a system in its evolution. New York: Nova Science Publishers. 444 p.

Mikhalevich V.I. 2021. Aromorphoses in the evolution of unicellular eukaryotes (as exemplified by Foraminifera d’Orbigny, 1826). Doklady biological Sciences, 499: 105–108. https://doi.org/10.1134/S0012496621040049

Mikhalevich V.I. & Bozhenova O.V. 2018. Foraminifera from the 58th and 59th Russian Antarctic Expeditions. Micropaleontology, 64(5–6): 527–534. https://doi.org/10.47894/mpal.64.6.14

Parr W.J. 1950. Foraminifera. In: B.A.N.Z. Antarctic Research Expedition 1929–1931 Reports, Series B (Zoology and Botany), 5(6): 237–392. Adelaide: B.A.N.Z.A.R. Expedition Committee.

Pawlowski J. 2000. Introduction to the molecular systematics of foraminifera. Micropaleontology, 46(Supplement 1): 1–12.

Pawlowski J., Holzmann M. & Tyszka J. 2013. New supraordinal classification of Foraminifera: molecules meet morphology. Marine Micropaleontology, 2013(100): 1–10. https://doi.org/10.1016/j.marmicro.2013.04.002

Piller W.E. 1983. Remarks on the suborder Involutinina Hohenegger and Piller, 1977. Journal of Foraminiferal Research, 13(3): 191–201. https://doi.org/10.2113/gsjfr.13.3.191

Revets S.A. 1989. Structure and taxonomy of the genus Delosina Wiesner, 1931(Protozoa: Foraminifera. Bulletin of the British Museum (Natural History), Zoological Seria, 55(1): 1–9.

Rigaud S. 2012. The Late Triassic Martin Bridge carbonate platform (Wallowa Terrane, NW U.S.A.): sedimentology, biostratigraphy, and contribution to the understanding of aragonitic and microgranular foraminifers. PhD Thesis. Geneve: Université de Genève. 199 p.

Rigaud S.,Blau J.,Martini R. & Rettori R. 2013a. Taxonomy and phylogeny of the Trocholinidae (Involutinina). Journal of Foraminiferal Research, 43(4): 317–339. https://doi.org/10.2113/gsjfr.43.4.317

Rigaud S., Martini R. & Rettori R. 2013b. A new genus of Norian involutinid foraminifer: Its morphological, biostratigraphic and evolutionary significance. Acta palaeontologica Polonica, 58: 391–405. https://doi.org/10.4202/app.2011.0072

Rigaud S., Blau J., Martini R. & Rettori R. 2015. Taxonomy, phylogeny, and functional morphology of the foraminiferal genus Involutina. Acta palaeontologica Polonica, 60: 235–244. https://doi.org/10.4202/app.2012.0056

Rigaud S., Schlagintweit F. & Bucur I.I. 2018. The foraminiferal genus Neotrocholina Reichel, 1955 and its less known relatives: A reappraisal. Cretaceous Research, 91: 41–65. https://doi.org/10.1016/j.cretres.2018.04.014

Rigaud S., Consorti L., Granier B. & Schlagintweit F. 2023. Foraminifera: did the first canal system developed in Involutinida? Historical Biology, 36(2): 221–240. https://doi.org/10.1080/08912963.2022.2155954

Rosales I. & Schlagentweit F. 2015. The uppermost Albian – lower Cenomanian Bielba Formation of the type-area (Cantabria, northern Spain): facies, biostratigraphy, and benthic Foraminifera. Facies, 61(3):1–30. https://doi.org/10.1007/s10347-015-0441-9

Schlagintweit F., Rigaud S. & Wilmsen M. 2015. Insights from exceptionally preserved Cenomanian trocholinids (benthic foraminifera) of northern Cantabria, Spain. Facies, 61(1): 1–27. https://doi.org/10.1007/s10347-014-0416-2

Violanti D. 1996. Taxonomy and distribution of recent benthic Foraminifera from Terra Nova Bay (Ross Sea, Antarctica). Oceanographic Campaign 1987/1988. Palaeontographia Italica, 83: 25–71.

Wiesner H. 1931. Die Foraminiferen der Deutsche Südpolar Expedition 1901–1903. Deutsche Südpolar Expedition, Zoologie, 20. Berlin: Walter de Gruyter & Co. 165 p. + 24 pls

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