• Source: Arionidae

Arionidae, common name the "roundback slugs" or "round back slugs" are a taxonomic family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the superfamily Arionoidea.




Distribution


The distribution of this family of slugs includes Nearctic, Palearctic and Oriental regions.




Anatomy


Unlike some slugs, European Arionidae have no keel on the back. The caudal mucous pit is above the tip of the tail. The respiratory pore (pneumostome) is in front of the midpoint of the mantle. The body length is up to 250 mm. The mantle covers only a part of the body and lies in the anterior part.
The jaw is odontognathic, which means it is transversally ribbed. Radular teeth include: central tricuspid, lateral bi- or tricuspid, marginal bicuspid, all having broad bases. Teeth are often accreted. The digestive system forms 2 loops. The heart, in relation to body axis, is titled to the left. The kidney is circular (surrounding aorta). Cephalic retractors tend to divide into separate branches attached independently to the posterior part of pallial complex. The shell is strongly reduced in places, most often completely buried in the mantle, usually of loose crystals or plate-like. Genitalia: the penis is present only in some species, epiphallus is present in nearly all of them. Male copulatory organs are generally reduced, their role being taken over by a well-developed atrium and the epiphallus that produces spermatophores.
In this family, the number of haploid chromosomes lies between 21 and 30 (according to the values in this table).




Genera


Family Arionidae has no subfamilies according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005.
The type genus of the family is Arion Férussac, 1819
Genera within the family Arionidae include:

Anadenulus Cockerell, 1890
Arion Férussac, 1819
Ariunculus Lessona, 1881
Carinacauda Leonard, Chichester, Richart & Young, 2011
Geomalacus Allman, 1843
Gliabates Webb, 1959
Hesperarion Simroth, 1891
Letourneuxia Bourguignat, 1866
Magnipelta Pilsbry, 1953
Prophysaon Bland & W. G. Binney, 1873
Securicauda Leonard, Chichester, Richart & Young, 2011
Udosarx Webb, 1959
Zacoleus Pilsbry, 1903




Parasites


The parasites of the Arionidae slugs include the Sciomyzidae.




References


This article incorporates public domain text from the reference.




External links



Round back slugs (Arionidae) on weichtiere.at.

Kata Kunci Pencarian:

• Siput telanjang
• Ter
• Pulmonata
• Siput pisang
• Arionidae
• Red slug
• Slug
• Black slug
• Spanish slug
• Kerry slug
• Limax maximus
• Arion (gastropod)
• Arion hortensis
• Arion lusitanicus