|
Athoracophoridae, common name the leaf-veined slugs, are a family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the infraorder Stylommatophora, the stalk-eyed snails and slugs. Many of the species have an attractive pattern on their dorsal surface which resembles the veins in a leaf, hence the common name. Athoracophoridae is the only family in the superfamily Athoracophoroidea. Leaf-veined slugs live on the various land masses and islands in the south-west Pacific area. The scientific name Athoracophoridae is derived from prefix "a-", that means "without" and from a Greek word "θωραχοφὁρος" (thorachoforos), that means "breastplate".〔 This is a reference to the fact that the mantle in these slugs is small and not well delineated; it does not have the obvious, saddle-shaped or breast-plate-shaped appearance that it does in most other land slug groups. == Anatomy == In the family Athoracophoridae (in subfamily Aneitinae and in subfamily Athoracophorinae), the number of haploid chromosomes lies between 36 and 45 (according to the values in this table).〔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.〕 While they belong to the pulmonate snails, they lack a true lung. The vascularized mantle cavity is reduced, and a series of blind tubules radiate from it, being surrounded blood vessels. This allows for a more compact lung structure in these generally flat animals. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Athoracophoridae」の詳細全文を読む スポンサード リンク
|