Systellommatophora

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Systellommatophora
Laevecaulis-2.jpg
Land slug Laevicaulis alte (Veronicelloidea)
Onchidella.jpg
Sea slug Onchidella sp. (Onchidioidea)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Superorder: Eupulmonata
Order: Systellommatophora
Families

See text

Synonyms

Gymnomorpha

The Systellommatophora (synonym Gymnomorpha) is a clade of primitive, air-breathing slugs, according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). [1]

Contents

They are marine and terrestrial pulmonate gastropods within the Heterobranchia. There are two superfamilies in this clade. Slugs in the superfamily Onchidioidea are primarily marine (except for five land-dwelling or freshwater species), [2] whereas slugs in the superfamily Veronicelloidea are primarily terrestrial.

Anatomy

No species in this clade has a shell as an adult. [2] [3] These slugs are distinguished by the location of the anus at the rear of the body. [4]

Although neither superfamily bears shells as adults, [3] the Onchidioidea do possess a vestigial, non-mineralized shell sac [5] and possess a larval shell. [6] It is not known whether or not the veronicellids bear a larval shell. [7]

Taxonomy

According to the previous taxonomy of the Gastropoda (Ponder & Lindberg, 1997) Systellommatophora was considered to be a suborder or an order. [8]

The following two superfamilies and families have been recognized in the taxonomy of Bouchet & Rocroi (2005):

References

  1. ↑ MolluscaBase eds. (2020). MolluscaBase. Stylommatophora. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=447 on 2020-05-02
  2. 1 2 Dayrat B. (2009). "Review of the current knowledge of the systematics of Onchidiidae (Mollusca: Gastropoda: Pulmonata) with a checklist of nominal species" (preview). Zootaxa . 2068: 1–26. doi:10.11646/zootaxa.2068.1.1.
  3. 1 2 Schilthuizen M.; Thome J. W. (2008). "Valiguna flava (Heynemann, 1885) from Indonesia and Malaysia: Redescription and Comparison with Valiguna siamensis (Martens, 1867) (Gastropoda: Soleolifera: Veronicellidae)". Veliger. 50 (3): 163–170.
  4. ↑ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 377. ISBN   0-03-056747-5.
  5. ↑ TILLIER, S (1983). "A new mountain Platevindex from Philippine Islands (Pulmonata: Onchidiidae)". Journal of Molluscan Studies. 49 (supp12A). Malacological Soc London: 198.
  6. ↑ Morton, Brian (1992). The Marine Flora and Fauna of Hong Kong and Southern China III___ Fouling and pollution, morphology, behaviour and physiology, Hoi Ha Wan. Hong Kong University Press. ISBN   978-962-209-295-2.
  7. ↑ Dayrat, B.; Tillier, S. (2002). "Evolutionary relationships of euthyneuran gastropods (Mollusca): a cladistic re-evaluation of morphological characters". Zoological Journal of the Linnean Society. 135 (4): 403. doi: 10.1046/j.1096-3642.2002.00018.x .
  8. ↑ "Systellommatophora". Integrated Taxonomic Information System.
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