References
- Barker, G.M. (1999). Naturalised terrestrial Stylommatophora (Mollusca: Gastropoda). Fauna of New Zealand 38. Manaaki Whenua Press, Lincoln, 253 pp.
- Scientific Name
- Arion sp.
- Scientific Author
- Taxonomy
- (Gastropoda: Pulmonata: Arionidae)
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Diagnostic Images
- Caption
- Source
Diagnostic Images (2)
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Dorsal - Adult
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Lateral - Adult
Diagnostic Notes
Shell internal, represented by separate calcareous granules. Mantle and back usually with lateral bands. Tail wide, obtuse; an indistinct keel present in some juveniles, but never in adults. Mantle shield without concentric ridges. Skin thick. Genital orifice immediately below pneumostome. Cephalic retractors widely separate at origin from posterior margin of diaphragm. Genital retractor short, arising from diaphragm close to left cephalic retractor, inserted into free oviduct, bursa copulatrix duct and phallus. Epiphallus strongly developed, rarely with a flagellum. Phallus vestigial, represented by an encompassing tissue ring around verge at entrance into atrium. Genitalia with or without a ligula. Epiphallus/phallus, free oviduct, and bursa copulatrix duct opening into atrium separately. Intestine with a single forward-directed loop, lacking a rectal caecum. Haploid chromosome number 25-29.
More Information
- Specimen Contact
- MAF Plant Health & Environment Laboratory
- Author
- MAF Plant Health & Environment Laboratory
- Created
- 14/04/2011 09:11 AEST
- Last Updated
- 19/03/2014 20:25 AEST
- Citation
- MAF Plant Health & Environment Laboratory (2011) Roundback Slug (Arion sp.) Updated on 3/19/2014 8:25:09 PM Available online: PaDIL - http://www.padil.gov.au.
- Image Use
- Free for use under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
