Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Monoplacophora
Ordo: † Pelagiellida
Familia: Pelagiellidae
Genera: Cambretina - Costipelagiella - Proeccyliopterus - Tannuspira - Tianzhushanospira
Name
Pelagiellidae Knight, 1952
References
Primitive fossil gastropods and their bearing on gastropod classification. 117(13), 1-56.
Pelagiellidae is an extinct family of Paleozoic fossil 'snails'. Some material assigned to this taxon represents gastropod molluscs, but some chaeta-bearing specimens first assigned to Pelagiella (now Pseudopelagiella) are perhaps better interpreted as tube-bearing annelid worms.[3]
Mineralogy
Aragonite, with various microstructures - details in reference [4]
Taxonomy
The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[5] categorizes Pelagiellidae in the superfamilia Pelagielloidea within the Paleozoic molluscs of uncertain systematic position. This family has no subfamilies.
According to P. Yu. Parkhaev, the family Pelagiellidae is in the order Pelagiellifomes MacKinnon, 1985 within the subclass Archaeobranchia Parkhaev, 2001, in the class Helcionelloida Peel, 1991.
Genera
Genera in the family Pelagiellidae include:
Pelagiella Matthew, 1895[6] - type genus of the family Pelagiellidae
Pelagiella atlantoides - synonym: Cyrtolithes atlantoides
Pelagiella emeishanensis - image
Pelagiella exigua[7] - synonym: Pseudopelagiella exigua
Proeccyliopterus Kobayashi, 1962
Protoscaevogyra Kobayashi, 1939
Cambretina Horný, 1964
Costipelagiella Horný, 1964
References
Wikimedia Commons has media related to Pelagiellidae.
Knight J. B. 1956. New families of Gastropoda. Journal of the Washington Academy of Sciences 46(2): 41-42.
Kobayashi (20 March) 1962. Journal of the Faculty of Science, University of Tokyo, section 2 (Geology, Mineralogy, Geography, Geophysics), 14(1):17.
Landing, Ed; Geyer, Gerd; Jirkov, Igor A.; Schiaparelli, Stefano (2021). "Lophotrochozoa in the Cambrian evolutionary radiation and the Pelagiella problem". Papers in Palaeontology. 7 (4): 2227–2244. Bibcode:2021PPal....7.2227L. doi:10.1002/spp2.1396. S2CID 239642828.
Li, Guoxiang; Yun, Hao; Zhang, Xingliang; Li, Luoyang (2017-05-16). "Complex hierarchical microstructures of Cambrian mollusk Pelagiella : Insight into early biomineralization and evolution". Scientific Reports. 7 (1): 1935. Bibcode:2017NatSR...7.1935L. doi:10.1038/s41598-017-02235-9. PMC 5434049. PMID 28512325.
Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdés Á. & Warén A. 2005. Classification and nomenclator of gastropod families. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. ISBN 3-925919-72-4. ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278
Matthew G.F. 1895. The Protolenus fauna. Transactions of the New York Academy of Sciences 14: 101-153. Pelagiella on the page 131. Plate VI., figure 6 a-c.
Runnegar, Bruce; Gehling, James G.; Jensen, Sören; Saltzman, Matthew R. (2024). "Ediacaran paleobiology and biostratigraphy of the Nama Group, Namibia, with emphasis on the erniettomorphs, tubular and trace fossils, and a new sponge, Arimasia germsi n. gen. n. sp". Journal of Paleontology. 98 (S94): 1–59. doi:10.1017/jpa.2023.81. ISSN 0022-3360.
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