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Laevicaulis alte is a round, dark-coloured slug with no shell, 7 or 8 cm (2.8 or 3.1 in) long. Its skin is slightly tuberculated. The central keel is beige in colour.. This slug has a unique, very narrow foot; juvenile specimens have a foot 1 mm (0.039 in) wide and adult specimens have a foot that is only 4 or 5 mm (0.16 or 0.20 in) wide.
Prophysaon coeruleum is a small, narrow slug which is notable for its typical blue-grey colour. [4] It varies in length, adults ranging from 20 to 40 mm (0.8 to 1.6 in), with nearly one-third of that length being the mantle. [4]
Being mostly or entirely without shells, most slugs have reduced mantles.) Pilsbry (1948) stated that "the enormously developed mantle , the large empty shell sac, and the insertions of the free retractor muscles along the margins of the foot cavity, instead of dorsally as in the Arionidae are special to the Philomycidae".
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 ...
Tiếng Việt; 文言; West-Vlams ... Gastropods (/ ˈ ɡ æ s t r ə p ɒ d z /), commonly known as slugs and snails, ... The foremost division of the foot is ...
The exact systematics of nudibranchs are a topic of recent revision. Traditionally, nudibranchs have been treated as the order Nudibranchia, located in the gastropod mollusc subclass Opisthobranchia (the marine slugs: which consisted of nudibranchs, sidegill slugs, bubble snails, algae sap-sucking sea slugs, and sea hares). [44]
This is a large species growing to at least 115 mm. It can be distinguished by its numerous (3 to 6), longitudinal, tuberculate notal ridges. The ridge and bases of the tubercles are a blue-grey colour. The tubercles are capped in yellow. The foot sole has a black longitudinal foot stripe. The rhinophoral clavus possesses 27 to 30 lamellae. [4]
A 30–40 mm. long (exceptionally up to 50 mm) roundback slug. In colour it is grey to bluish black, with dark lateral bands (the right band usually running entirely above the pneumostome). The tentacles are bluish or reddish, and the slug bluish or orange tip at the tail. The first row of tubercles above the foot-fringe is white.