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The black slug (also known as black arion, European black slug, or large black slug), Arion ater, is a large terrestrial gastropod mollusk in the family Arionidae, the round back slugs. Many land slugs lack external shells, having a vestigial shell. [ 2 ]
A slug on a wall in Kanagawa, Japan.. 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 semi-slugs (this is in contrast to the common name snail, which applies to ...
Limax maximus (literally, "biggest slug"), known by the common names great grey slug and leopard slug, is a species of slug in the family Limacidae, the keeled slugs. [4] It is among the largest keeled slugs, Limax cinereoniger being the largest. Limax maximus is the type species of the genus Limax. The adult slug measures 10–20 cm (3.9–7.9 ...
The Pacific Banana Slug (Ariolimax columbianus) is a species of slug found on the Pacific coast of North America. [1] It is the second-largest species of terrestrial slug in the world, growing up to 25 centimeters (9.8 in) long. [1] As of 2021, it is the most commonly observed species in the genus Ariolimax on the citizen science website ...
There have been hybridizations of snail species; although these do not occur commonly in the wild, in captivity they can be coaxed into doing so. Parthenogenesis has been reported only in one species of slug, [21] but many species can self-fertilise. [22] C. obtusus is a prominent endemic snail species of the Eastern Alps.
This class comprises snails and slugs from saltwater, freshwater, and from the land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, land snails and slugs. The class Gastropoda is a diverse and highly successful class of mollusks within the phylum Mollusca.
They grow very quickly, at an average rate of 4.9 g/day. [5] This high rate of growth allows A. vaccaria to become the largest known species of sea slug. [2] It is a herbivore that feeds on brown algae, but its close relative A. californica feeds almost exclusively on red algae. [6]
Umbilicus: in shells where the whorls move apart as they grow, on the underside of the shell there is a deep depression reaching up towards the spire; this is the umbilicus; Varix: on some mollusk shells, spaced raised and thickened vertical ribs mark the end of a period of rapid growth; these are varices