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: Gastropoda
Subclassis: Vetigastropoda
Ordo: Seguenziida
Superfamilia: Seguenzioidea
Familiae (8 +6†): Cataegidae – Chilodontaidae – Choristellidae – Eucyclidae – Eudaroniidae – Pendromidae – Seguenziidae – Trochaclididae – Unassigned Seguenzioidea – †Eucycloscalidae – †Eunemopsidae – †Lanascalidae – †Laubellidae – †Pseudoturcicidae – †Sabrinellidae
Genera Incertae sedis (18): Adeuomphalus – Aequispirella – Akritogyra – Anekes – Brookula – Granigyra – Lissotesta – Lissotestella – Microcarina – Moelleriopsis – Notosetia – Palazzia – Retigyra – Trenchia – Ventsia – Vetulonia – Wanganella – Xyloskenea
Name
Seguenzioidea Verrill, 1884
References
Verrill, A.E., 1884. Notice of the Remarkable Marine Fauna occupying the Outer Banks off the Southern Coast of New England, No. 9. The American journal of science ser. 3. 28(165): 213-220. BHL Reference page.
Bouchet, P., & J.-P. Rocroi. 2005. Classification and nomenclator of gastropod families. Malacologia 47(1-2): 1–397.
Kaim, A., Hryniewicz, K., Little, C.T.S. & Nakrem, H.A. 2017. Gastropods from the Late Jurassic–Early Cretaceous seep deposits in Spitsbergen, Svalbard. Zootaxa 4329(4): 351–374. DOI: 10.11646/zootaxa.4329.4.3. Reference page.
Links
Seguenzioidea in the World Register of Marine Species
Seguenzioidea is a superfamily of minute to medium-sized sea snails, marine gastropod mollusks in the clade Vetigastropoda.[2] [3]
Description
Three Seguenziid gastropods
The distinctive characteristics of the shells of the Seguenzioidea are:
the nacreous layer (a plesiomorphic character, i.e. a character state that a taxon is inferred to have been retained from its ancestors) This occurs also in the following families: Pleurotomariidae, Haliotidae, Turbinidae, Trochidae, and possibly in the Skeneidae.
the protoconch has a trochoid shape.
usually with one or more labral sinuses. This character is also found is several other superfamilies such as Neomphaloidea, Pleurotomarioidea, Fissurelloidea, and Scissurelloidea and in the families Siliquariidae and Turridae. Therefore, this characteristic is to be considered autapomorphic.
a unique radular formula with an underlying rhipidoglossate ground plan.[4]
Taxonomy
This superfamily was placed in part or in whole previously to 1979 either in the Archaeogastropoda near the superfamily Trochoidea or in the Caenogastropoda near the superfamily Stromboidea.[5] In 1987 Salvini-Plawén and Haszprunar changed its status to the suborder Seguenziina, based on the radular formula that they considered to be intermediate between "rhipidoglossate" and "taenioglossate".[6] At about the same time in 1987 Goryachev elevated the superfamily to ordinal status Seguenziiformes in the superorder Littorinimorpha, based on the taenioglossal radula.[7]
2005 taxonomy
2005 taxonomy according to Bouchet & Rocroi, 2005. (Families that are exclusively fossil are indicated with a dagger †.)
Superfamily Seguenzioidea
Family Seguenziidae
Family Chilodontaidae
† Family Eucyclidae
† Family Laubellidae
2007–2009 taxonomy
Kano et al. (2009)[8] elevated the subfamily Calliotropinae to the family level as the Calliotropidae, and the subfamily Cataeginae to family level as the Cataegidae.[8]
The superfamily Seguenzioidea consists of six families:[9]
Cataegidae McLean & Quinn, 1987
Chilodontaidae Wenz, 1938
Choristellidae Bouchet & Warén, 1979
Eucyclidae Koken, 1896
† Eucycloscalidae Gründel, 2007
Eudaroniidae Gründel, 2004
† Eunemopsidae Bandel, 2010
† Lanascalidae Bandel, 1992
† Laubellidae Cox, 1960
Pendromidae Warén, 1991
† Pseudoturcicidae Bandel, 2010
† Sabrinellidae Bandel, 2010
Seguenziidae Verrill, 1884
Trochaclididae Thiele, 1928
Unassigned to a family
Adeuomphalus Seguenza, 1876 [8]
Aequispirella Finlay, 1924
Akritogyra Warén, 1992
Anekes Bouchet & Warén, 1979
Benthobrookula A. H. Clarke, 1961
Brookula Iredale, 1912
Eudaronia Cotton, 1945
Granigyra Dall, 1889
Lissotesta Iredale, 1915
Lissotestella Powell, 1946
Microcarina Laseron, 1954
Moelleriopsis Bush, 1897
Notosetia Iredale, 1915
Palazzia Warén, 1991
Putilla A. Adams, 1867
Retigyra Warén, 1989
Trenchia Knudsen, 1964
Ventsia Warén & Bouchet, 1993
Vetulonia Dall, 1913
Wanganella Laseron, 1954
Xyloskenea B. A. Marshall, 1988
Unassigned genera brought into synonymy
Abyssogyra A.H. Clarke, 1961: synonym of Moelleriopsis Bush, 1897
Intortia Egorova, 1972: synonym of Lissotesta Iredale, 1915
Molleriopsis : synonym of Moelleriopsis Bush, 1897
References
Lindberg, edited by Winston F. Ponder, David R. (2008). Phylogeny and evolution of the Mollusca. Berkeley: University of California Press. ISBN 978-0-520-25092-5. {{cite book}}: |first1= has generic name (help)
Gofas, S. (2010). Seguenzioidea. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224565 on 2011-01-09
Bouchet, P. & Rocroi, J.-P. (2005). "Classification and Nomenclator of Gastropod Families". Malacologia. 47 (1–2).
James F. Quinn Jr., (1991), Systematic Position of Basilissopsis and Guttula, and a Discussion of the Phylogeny of the Seguenzioidea (Gastropoda: Prosobranchia), Bulletin of Marine Science, Volume 49, Numbers 1-2, September 1991 , pp. 575-598(24)[permanent dead link]
Quin 1983. "A revision of the Seguenziacea Verrill, 1884 (Gastropoda: Prosobranchia). I. Summary and evaluation of the superfamily". Proc. BioI. Soc. Wash. 96(4): 725-757.
Salvini-Plawén and G. Haszprunar. 1987. The Vetigastropoda and the systematics of streptoneurous gastropods (Mollusca). J. Zool. (London) A211: 747-770
Goryachev, 1987. Ob'em i polozhenie semeistva Seguenziidae (Mollusca, Gastropoda, Seguenziidae) v klasse bryukhonogikh mollyuskov. [The volume and the position of the family Seguenziidae (Mollusca, Gastropoda, Seguenziidae) in the gastropod class]. Pages 21–23 in Va. I. Starobogatov, A. N. Golikov, and 1. M. Likharev, eds. Molluscs. Results and perspectives of investigation. Abstracts of communications. Zoological Institute, Akademiya Nauk SSSR, Leningrad.
Kano Y., Chikyu E. & Warén A. (2009) "Morphological, ecological and molecular characterization of the enigmatic planispiral snail genus Adeuomphalus (Vetigastropoda: Seguenzioidea)". Journal of Molluscan Studies 75: 397-418. doi:10.1093/mollus/eyp037.
WoRMS : Seguenzioidea; accessed : 1 October 2010
Kano, Y. 2008: Vetigastropod phylogeny and a new concept of Seguenzioidea: Independent evolution of copulatory organs in the deep-sea habitats. Zoologica Scripta 37: 1-21
James F. Quinn Jr., (1991), Systematic Position of Basilissopsis and Guttula, and a Discussion of the Phylogeny of the Seguenzioidea (Gastropoda: Prosobranchia), Bulletin of Marine Science, Volume 49, Numbers 1-2, September 1991 , pp. 575-598(24)[permanent dead link]
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