Ad
related to: slug internal shell
Search results
Results From The WOW.Com Content Network
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 ...
Chlamydephorus slugs have an internal vestigial shell. The pallial organs are located at the posterior end of the elongated body and embedded under the dorsal integument. The elongation of the buccal mass varies greatly among the different species of the family and this is reflected in the size of the radula and the number of tee
Philine aperta, the sand slug, is a species of predatory sea slug with an internal shell, a cephalaspid opisthobranch, or head-shield slug. It is a marine gastropod mollusc in the family Philinidae .
This is particularly common in the opisthobranchs and in some of the pulmonates, for example in the semi-slugs. Some gastropods have no shell at all, or only an internal shell or internal calcareous granules, and these species are often known as slugs. Semi-slugs are pulmonate slugs with a greatly reduced external shell which is in some cases ...
Land slugs can be thought of as land snails that over evolutionary time have either lost the shell completely, have a very reduced external shell, or have retained only internal remnants of a shell. Land slugs are a highly polyphyletic group, which means that many land slug families are not at all closely related to one another.
In the land slugs, the shell is reduced or absent, and the body is streamlined. Some gastropods have adult shells which are bottom heavy due to the presence of a thick, often broad, convex ventral callus deposit on the inner lip and adapical to the aperture which may be important for gravitational stability.
Gastropteridae is a fairly diverse family containing four genera and thirty-three described species. Adults have an internal reduced shell or no shell at all. The body is fairly short, usually under 10 mm (0.4 in) in length, but exceptionally up to 35 mm (1.4 in). [3]
The Kerry slug has an internal shell or shell plate that resembles those found in land slugs of the genus Limax; it is ovoid, solid and chalky with a transparent conchiolin (horny) base. The shell plate is usually convex above and concave beneath and has some indistinct, concentric lines of growth.