Note. In slugs it is often difficult to establish good criteria for identifying species using external features or internal features, as colouration can be quite variable, and the rather plastic anatomy makes diagnostic anatomical features difficult to establish.
Up to 40 millimetres (1.6 in) long. A roundback slug but with a keel consisting of pale, raised tubercles along the back. In colour the slug is grey to greyish brown becoming whitish down to the sides. There are broad and well marked dark lateral colour bands (white sides below the bands). The sole is whitish or cream. The mucus is transparent or slightly yellowish. Genitalia: atrium large, broad and flattened, epiphallus wider than vas deferens, oviduct wide, half diameter as atrium, spermatheca elongate and somewhat arrow-shaped.[1]
Distributionedit
This species occurs in countries and islands including:
The original description of the three slugs in the subgenus Carinarion, Arion (Carinarion) fasciatus, Arion (Carinarion) silvaticus and Arion (Carinarion) circumscriptus was based on small differences in body pigmentation and details of the genital anatomy. A recent study of these morphospecies (typological species) claims that previous studies had shown that body colour in these slugs may be influenced by their diet, and the genital differences were not confirmed by subsequent multivariate morphometric analyses. Analysis of alloenzyme and albumen gland proteins had given conflicting results. Also that evidence of interspecific hybridization in places where these predominantly self-fertilizing slugs apparently outcross contradicted their status as biological species. Molecular studies led to the conclusion that the three members of Carinarion are a single species-level taxon.[3] The name Arion fasciatus has priority.
^Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.
^Sofie Geenen, Kurt Jordaens, Thierry Backeljau: Molecular systematics of the Carinarion complex (Mollusca: Gastropoda: Pulmonata): a taxonomic riddle caused by a mixed breeding system. Biological Journal of the Linnean Society, 89(4): 589–604, London 2006 doi:10.1111/j.1095-8312.2006.00693.x
External linksedit
Arion silvaticus at Animalbase taxonomy, short description, distribution, biology, status (threats), images
External images
This Arionidae-related article is a stub. You can help Wikipedia by expanding it.
arion, silvaticus, species, breathing, land, slug, terrestrial, pulmonate, gastropod, mollusk, family, arionidae, specimens, naturalis, biodiversity, center, scientific, classification, domain, eukaryota, kingdom, animalia, phylum, mollusca, class, gastropoda,. Arion silvaticus is a species of air breathing land slug a terrestrial pulmonate gastropod mollusk in the family Arionidae Arion silvaticus Arion silvaticus specimens in Naturalis Biodiversity Center Scientific classification Domain Eukaryota Kingdom Animalia Phylum Mollusca Class Gastropoda Subclass Heterobranchia Order Stylommatophora Family Arionidae Genus Arion Species A silvaticus Binomial name Arion silvaticusLohmander 1937 Contents 1 Description 2 Distribution 3 Taxonomy 4 References 5 External linksDescription editNote In slugs it is often difficult to establish good criteria for identifying species using external features or internal features as colouration can be quite variable and the rather plastic anatomy makes diagnostic anatomical features difficult to establish Up to 40 millimetres 1 6 in long A roundback slug but with a keel consisting of pale raised tubercles along the back In colour the slug is grey to greyish brown becoming whitish down to the sides There are broad and well marked dark lateral colour bands white sides below the bands The sole is whitish or cream The mucus is transparent or slightly yellowish Genitalia atrium large broad and flattened epiphallus wider than vas deferens oviduct wide half diameter as atrium spermatheca elongate and somewhat arrow shaped 1 Distribution editThis species occurs in countries and islands including Czech Republic Ukraine 2 Great Britain IrelandTaxonomy editThe original description of the three slugs in the subgenus Carinarion Arion Carinarion fasciatus Arion Carinarion silvaticus and Arion Carinarion circumscriptus was based on small differences in body pigmentation and details of the genital anatomy A recent study of these morphospecies typological species claims that previous studies had shown that body colour in these slugs may be influenced by their diet and the genital differences were not confirmed by subsequent multivariate morphometric analyses Analysis of alloenzyme and albumen gland proteins had given conflicting results Also that evidence of interspecific hybridization in places where these predominantly self fertilizing slugs apparently outcross contradicted their status as biological species Molecular studies led to the conclusion that the three members of Carinarion are a single species level taxon 3 The name Arion fasciatus has priority References edit Animalbase Welter Schultes Balashov I amp Gural Sverlova N 2012 An annotated checklist of the terrestrial molluscs of Ukraine Journal of Conchology 41 1 91 109 Sofie Geenen Kurt Jordaens Thierry Backeljau Molecular systematics of the Carinarion complex Mollusca Gastropoda Pulmonata a taxonomic riddle caused by a mixed breeding system Biological Journal of the Linnean Society 89 4 589 604 London 2006 doi 10 1111 j 1095 8312 2006 00693 xExternal links editArion silvaticus at Animalbase taxonomy short description distribution biology status threats images External images This Arionidae related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Arion silvaticus amp oldid 1172532140, wikipedia, wiki, book, books, library,
