Trissexodontidae

Trissexodontidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).

Trissexodontidae
Apertural view of the shell of Trissexodon constrictus. Scale is in mm. A regularly ribbed shell is one of the characteristics of this family.
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Superorder: Eupulmonata
Order: Stylommatophora
Suborder: Helicina
Infraorder: Helicoidei
Superfamily: Helicoidea
Family: Trissexodontidae
H. Nordsieck, 1987[1]
Genera

See text

Synonyms[2]
  • Caracollinini H. Nordsieck, 1987
  • Oestophorini H. Nordsieck, 1987
  • Mastigophallini Schileyko, 1991[3]
  • Gittenbergeriinae Schileyko, 1991

This family has no subfamilies.[2] The family Trissexodontidae was separated out from the families Hygromiidae and Helicodontidae,[2] and some authors still classify these species within those families.

Distribution

The distribution of Trissexodontidae includes the Iberian peninsula, northwest Africa,[4] Azores,[5] Canary Islands, Madeira and Cape Verde.[6]

Genera

Genera within the family Trissexodontidae include:

  • Caracollina Beck, 1837[4]
  • Gasullia Ortiz de Zárate López, 1962[4]
  • Gasulliella Gittenberger, 1980[4] - with only one species, Gasulliella simplicula (Morelet, 1845)
  • Gittenbergeria Schileyko, 1991[4]
  • Mastigophallus Hesse, 1918[4] - with only one species, Mastigophallus rangianus (Michaud, 1831)
  • Oestophora Hesse, 1907[4]
  • Oestophorella Pfeffere, 1929[4]
  • Trissexodon Pilsbry, 1895[4] - type genus of the family Trissexodontidae
  • Spirorbula Lowe, 1852 - probable classification,[4] from Madeira and Porto Sancto[7]
  • Suboestophora Ortiz de Zárate López, 1962[8]

Description

Shells of species in the family Trissexodontidae are flat and regularly ribbed. The periostracum of the shell surface has no hairs.[4]

A description of the reproductive system was summarized by Prieto et al. (1993).[4]

In this family, the number of haploid chromosomes is known only for the genus Oestophora (n=30).[4]

References
  1. (in German) Nordsieck H. (1987). "Revision des Systems der Helicoidea (Gastropoda: Stylommatophora)". Archiv für Molluskenkunde 118(1-3): 9-50. page 30.
  2. Bouchet, Philippe; Rocroi, Jean-Pierre; Frýda, Jiri; Hausdorf, Bernard; Ponder, Winston; Valdés, Ángel & Warén, Anders (2005). "Classification and nomenclator of gastropod families". Malacologia. Hackenheim, Germany: ConchBooks. 47 (1–2): 1–397. ISBN 3-925919-72-4. ISSN 0076-2997.
  3. Schileyko A. A. (1991). "Taxonomic status, phylogenetic relations and system of the Helicoidea sensu lato (Pulmonata)". Archiv für Molluskenkunde 120(4-6): 187-236. page 225.
  4. Prieto C. E., Puente A. I, Altonaga K. & Gomez J. (1993). "Genital morphology of Caracolina lenticula (Michaud, 1831), with a new proposal of classification of helicodontoid genera (Pulmonata: Hygromioidea)". Malacologia 35(1): 63-77. page 73-74.
  5. "Genus summary for Oestophora". AnimalBase, last modified 17 July 2008, accessed 13 January 2011.
  6. "Genus summary for Caracollina". AnimalBase, last modified 17 August 2007, accessed 13 January 2011.
  7. "Genus taxon summary for Spirorbula". AnimalBase, last modified 09 September 2008, accessed 13 January 2011.
  8. "Suboestophora Ortiz de Zarate Lopez 1962". Fauna Europaea, accessed 13 January 2011.
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