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Arion Subfuscus
''Arion subfuscus'' is a species of land slug. It forms a species complex In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often unclear. The taxa in the complex may be able to hybridize readily with each oth ... with '' Arion fuscus''. References subfuscus Gastropods described in 1805 {{Arionidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slug
Slug, or land slug, is a common name for any apparently shell-less terrestrial gastropod mollusc. The word ''slug'' is also often used as part of the common name of any gastropod mollusc that has no shell, a very reduced shell, or only a small internal shell, particularly sea slugs and semislugs (this is in contrast to the common name ''snail'', which applies to gastropods that have a coiled shell large enough that they can fully retract their soft parts into it). Various taxonomic families of land slugs form part of several quite different evolutionary lineages, which also include snails. Thus, the various families of slugs are not closely related, despite a superficial similarity in the overall body form. The shell-less condition has arisen many times independently as an example of convergent evolution, and thus the category "slug" is polyphyletic. Taxonomy Of the six orders of Pulmonata, two – the Onchidiacea and Soleolifera – solely comprise slugs. A third family, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Complex
In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often unclear. The taxa in the complex may be able to hybridize readily with each other, further blurring any distinctions. Terms that are sometimes used synonymously but have more precise meanings are cryptic species for two or more species hidden under one species name, sibling species for two (or more) species that are each other's closest relative, and species flock for a group of closely related species that live in the same habitat. As informal taxonomic ranks, species group, species aggregate, macrospecies, and superspecies are also in use. Two or more taxa that were once considered conspecific (of the same species) may later be subdivided into infraspecific taxa (taxa within a species, such as bacterial strains or plant varieties), that is complex but it is not a species complex. A species complex is in most cas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arion Fuscus
''Arion fuscus'', also known as the "dusky arion", is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Arionidae, the roundback slugs. ''Arion subfuscus'' (Draparnaud, 1805) is considered by some authors to be a partial synonym for ''Arion fuscus''. ''Arion subfuscus'' (Draparnaud, 1805) and ''A. fuscus'' (Müller, 1774) have very similar morphology and have overlapping distributional ranges in northwestern Europe. ''Arion fuscus'' is widespread throughout Central, North and East Europe whereas ''A. subfuscus'' is restricted to West Europe. (For practical purposes the two are synonyms in Germany and in the Czech Republic.) The two taxa are referred to as the species complex ''Arion subfuscus''/''fuscus'' both members having several evolutionary lineages. They are only separable by alloenzyme analysis and gonad type. Description A 50–70 mm roundback slug. It is brown in colour, ranging from black-brown through olive-brown ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arion (gastropod)
''Arion'' is a genus of air-breathing land slugs in the family Arionidae, the roundback slugs. Most species of this Palearctic genus are native to the Iberian Peninsula. Species can be difficult to distinguish from one another upon cursory examination, because individuals of a species can vary in color and there are few obvious differences between taxa. The color of an individual can be influenced by its diet.Jordaens, K., et al. (2001)Food-induced body pigmentation questions the taxonomic value of colour in the self-fertilizing slug ''Carinarion'' spp.''Journal of Molluscan Studies'' 67(2), 161-67. Some ''Arion'' are known as pests, such as ''A. lusitanicus'' auct. non Mabille (= ''A. vulgaris''), which damages agricultural crops and ornamental plants, and ''A. rufus'', a familiar garden pest. ''Arion'' slugs are often transported internationally in shipments of plant products and mushrooms. ''Arion'' slugs have been identified in North America and Australia as invasive species, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
