Agriolimacidae

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Agriolimacidae
Temporal range: Pleistocene–Recent[1]
Slak kleine naaktslak.jpg
The largest slug in the image is an individual of Deroceras reticulatum
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
clade limacoid clade
Superfamily: Limacoidea
Family: Agriolimacidae
H. Wagner, 1935
Diversity[2][3][2]
6 genera, about 135 species (123 species in Deroceras + at least 12 other species)

Agriolimacidae is a family of small and medium-sized land slugs, or shell-less snails, terrestrial pulmonate gastropod mollusks.

Distribution[edit]

Distribution of Limacidae is Holarctic,[1] this include: Nearctic, western Palearctic and eastern Palearctic.[4]

Agriolimacidae is the largest slug family, some are introduced all over the world, synanthropes are often severe pests.[1]

This view of the right side of Deroceras praecox clearly shows the position of its pneumostome.

Anatomy[edit]

Most slugs in the family Agriolimacidae are rather small; only a few (in the genera Mesolimax and Krynickillus) are larger. Most are not more than 50 mm long.[1] The mantle is usually large, occupying approximately 1/3 of the entire body length, situated in the anterior part of the body.[1] The pneumostome is clearly postmedial.[1] The surface of the mantle in living slugs is covered in concentric, mobile wrinkles.[1] In addition sometimes there is a shallow, poorly defined groove which runs above the pneumostome on the right side, not passing to the left.[1]

The penis is short, usually bag-shaped, often with external appendages, inside with different stimulatory organs.[1] No tubular membrane encircles the penis and vas deferens.[1] The penis retractor muscle is situated beside the right tentacle.[1]

In this family, the number of haploid chromosomes lies between 26 and 30 (according to the values in this table).[5]

Taxonomy[edit]

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

  • subfamily Agriolimacinae H. Wagner, 1935 - synonym: Deroceratinae Magne, 1952
  • subfamily Mesolimacinae Hausdorf, 1998

Genera[edit]

Genera within the family Agriolimacidae include:

subfamily Agriolimacinae

subfamily Mesolimacinae

subfamily ?

Cladogram[edit]

A cladogram showing the phylogenic relationships of this family to other families within the limacoid clade:[4]

 limacoid clade 
 Staffordioidea 

Staffordiidae




 Dyakioidea 

Dyakiidae


 Gastrodontoidea 

Pristilomatidae




Chronidae




Euconulidae



Trochomorphidae





Gastrodontidae



Oxychilidae







 Parmacelloidea 

Trigonochlamydidae



Parmacellidae



Milacidae





 Zonitoidea 

Zonitidae


 Helicarionoidea 

Helicarionidae




Ariophantidae



Urocyclidae





 Limacoidea 

Vitrinidae




Boettgerillidae




Limacidae



Agriolimacidae









References[edit]

This article incorporates public domain text from the reference.[1]

  1. ^ a b c d e f g h i j k l "Family summary for Agriolimacidae". AnimalBase, last change 23-05-2010, accessed 4 August 2010
  2. ^ a b "Genera in family Agriolimacidae" [n = 6]. AnimalBase, accessed 10 September 2010.
  3. ^ Wiktor, A. (2000). "Agriolimacidae (Gastropoda: Pulmonata): a systematic monograph". Annales Zoologici 49: 347-590. abstract
  4. ^ a b Hausdorf B. (2000). "Biogeography of the Limacoidea sensu lato (Gastropoda: Stylommatophora): Vicariance Events and Long-Distance Dispersal". Journal of Biogeography 27(2): 379-390. doi:10.1046/j.1365-2699.2000.00403.x, JSTOR.
  5. ^ Barker G. M.: Gastropods on Land: Phylogeny, Diversity and Adaptive Morphology. in Barker G. M. (ed.): The biology of terrestrial molluscs. CABI Publishing, Oxon, UK, 2001, ISBN 0-85199-318-4. 1-146, cited pages: 139 and 142.

External links[edit]