Arion subfuscus

{{Short description|Species of gastropod}} {{Speciesbox | image = Arion-subfuscus-braune-wegschnecke.jpg | status = LC | status_system = IUCN3.1 | status_ref = <ref name=IUCN>{{cite iucn |last1=Rowson |first1=B. |year=2017 |title=''Arion subfuscus'' |volume=2017 |article-number=e.T171489A85579367 |doi=10.2305/IUCN.UK.2017-3.RLTS.T171489A85579367.en |access-date=6 May 2026}}</ref> | status2 = G5 | status2_system = TNC | status2_ref = <ref name=NS>{{cite NatureServe |id=2.121098 |title=''Arion subfuscus'' |access-date=7 May 2026}}</ref> | taxon = Arion subfuscus | authority= (Draparnaud), 1805) | synonyms_ref= | synonyms= * ''Arion (Mesarion) subfuscus'' (Draparnaud, 1805) alternative representation * ''Arion subfuscus var. cinereofuscus'' (Draparnaud, 1805) (variety) * ''Arion subfuscus var. fennicus'' Simroth, 1902 (junior synonym) * ''Limax subfuscus'' Draparnaud, 1805 (original combination) * ''Limax subfuscus var. cinereo-fuscus'' Draparnaud, 1805 (junior synonym) }}

'''''Arion subfuscus''''' is a species of land slug. It forms a species complex with ''Arion fuscus''.<ref name=mb/><ref name=pinceel2004/><ref name="WoRMS">{{WRMS species|1049809|''Arion subfuscus''|2 November 2025}}</ref>

==Description== (Original description in French) The animal is elongated and moderately thick. The mantle is slightly humped in the front. The neck is rather short, as are the lower tentacles. The upper tentacles are thick at their base and taper toward the top, which is globulous (or swollen). They are blackish, as is the upper part of the head, which is crossed by four longitudinal lines (or stripes). The mantle is granular, and the back is strewn with anastomosing ridges (ridges that interconnect like a net). The underside of the animal is whitish, and yellowish in the middle. The edge of the foot is grey and marked with small transverse black lines. At the tail, one sees overlapping lamellae (plates or folds). The colour of this animal varies. The mantle and the upper side of the body are always a fairly dark brown, and there is a black band on each side of both the mantle and the body.

However, variety α is coloured with a reddish tint, which is much more noticeable toward the middle of the mantle, and especially on each side of the body below the two black bands.In contrast, in variety β, the tint is ashen or greyish, against which the blackish network formed by the anastomosing ridges stands out on each side of the body.<ref>{{cite book |last1=Draparnaud |first1=J.-P.-R. |title=Histoire naturelle des mollusques terrestres et fluviatiles de la France. 2 pp. (Avertissement a sa Majesté l'Impératrice), 2 pp. Rapport, i-viii (Préface) |date=1805 |publisher=Levrault & Schoell |location=Paris |pages=125–126 |url=https://www.biodiversitylibrary.org/page/52682088 |access-date=2 November 2025}} {{source-attribution}}</ref>

==Distribution== It is native to Eurasia, and has been introduced to eastern North America.

==References== {{Reflist|refs= <ref name=mb>{{cite web |title=''Arion subfuscus'' (Draparnaud, 1805) |url=http://www.molluscabase.org/aphia.php?p=taxdetails&id=1049809 |website=www.molluscabase.org |publisher=MolluscaBase |accessdate=10 December 2018}}</ref> <ref name=pinceel2004>{{cite journal |last1=Pinceel |first1=J. |last2=Jordaens |first2=K. |last3=Houtte |first3=N. Van |last4=Winter |first4=A. J. De |last5=Backeljau |first5=T. |title=Molecular and morphological data reveal cryptic taxonomic diversity in the terrestrial slug complex Arion subfuscus/fuscus (Mollusca, Pulmonata, Arionidae) in continental north-west Europe |journal=Biological Journal of the Linnean Society |date=1 September 2004 |volume=83 |issue=1 |pages=23–38 |doi=10.1111/j.1095-8312.2004.00368.x |language=en |issn=1095-8312|doi-access=free }}</ref> }} * Bank, R. A.; Neubert, E. (2017). Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16, 2017. * Wiktor, A., De-Niu, C. & Ming, W. (2000). Stylommatophoran slugs of China (Gastropoda: Pulmonata)-Prodromus. Folia Malacologica. 8(1): 3-35. * Garrido, C., Castillejo, J. & Iglesisas, J. (1995). The Arion subfuscus complex in the eastern part of the Iberian Peninsula, with redescription of Arion subfuscus (Draparnaud 1805) (Gastropoda: Pulmonata: Arionidae). Archiv für Molluskenkunde, 124 (1/2): 103-118. Frankfurt am Main, page(s): 104 * Sysoev, A. V. & Schileyko, A. A. (2009). Land snails and slugs of Russia and adjacent countries. Sofia/Moskva (Pensoft). 312 pp., 142 plates

==External links== * {{cite book |last1=Simroth |first1=H. |title=Die Nacktschneckenfauna des Russischen Reiches. XII |date=1902 |publisher=Kaiserlichen Akademie der Wissenschaften |location=St. Petersburg |page=50 |url=https://www.biodiversitylibrary.org/page/32173528 |access-date=2 November 2025}} * {{cite journal |last1=Lee |first1=C.B. |title=Some new records for exotic slugs in the United States |journal=The Nautilus |date=1950 |volume=64 |issue=2 |pages=58–59 |url=https://www.biodiversitylibrary.org/page/8524323}} * {{cite journal |last1=Jacobson |first1=M.K. |title=Two new molluscan records from the New York area |journal=The Nautilus |date=1951 |volume=64 |issue=3 |page=104 |url=https://www.biodiversitylibrary.org/page/8524371}} * {{cite journal |last1=Getz |first1=L.L. |title=Color forms of Arion subfuscus in New Hampshire |journal=The Nautilus |date=1962 |volume=76 |issue=2 |pages=70–71 |url=https://www.biodiversitylibrary.org/page/8514516}} * {{cite journal |last1=Getz |first1=L.L. |title=Arion subfuscus in the vicinity of Washington, D.C. |journal=The Nautilus |date=1974 |volume=88 |issue=2 |page=66 |url=https://www.biodiversitylibrary.org/page/8097403}} * {{cite journal |last1=Blanchard, D. & Getz, L. L. |title=Arion subfuscus in southeastern Michigan. |journal=The Nautilus |date=1979 |volume=93 |issue=1 |pages=36–37 |url=https://www.biodiversitylibrary.org/page/8275084}}

subfuscus Category:Gastropods described in 1805 Category:Molluscs of Europe Category:Taxa named by Jacques Draparnaud