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The Vermetidae, the worm snails or worm shells, are a taxonomic family of small to medium-sized sea snails, marine gastropod molluscs in the clade Littorinimorpha. [1] The shells of species in the family Vermetidae are extremely irregular, and do not resemble the average snail shell, hence the common name "worm shells" or "worm snails".
The Dendropoma gregarium is a worm snail in the family Vermetidae. [2] It is identifiable by its brown shell that forms in irregular coils around its body, making it resemble a worm. [ 3 ]
Dendropoma petraeum is a species of sea snail, ... "Spermiogenesis in the vermetid gastropod Dendropoma petraeum ... Code of Conduct;
Vitularia salebrosa is a species of sea snail, ... and the vermetid gastropod Tripsycha (Eualetes) tulipa. [6] ... Code of Conduct;
This list of marine gastropod genera in the fossil record is an attempt to list all the genera of sea snails or marine gastropod mollusks which have been found in the fossil record. Nearly all of these are genera of shelled forms, since it is relatively rare for gastropods without a shell ( sea slugs ) to leave any recognizable traces.
Within the main clade Heterobranchia, the informal group Opisthobranchia are simultaneous hermaphrodites (they have both sets of reproductive organs within one individual at the same time). There are also a few marine pulmonates , and these are also hermaphroditic, for example, see the air-breathing sea slug family Onchidiidae , and the family ...
They live in tropical climates. [3] The type locality is Kuroshima, Taketomi, Okinawa, Ryukyu Islands. [4] They have two dark eyes and two rhinophores that emerge from the tops of their heads that look similar to sheep's ears or insect antennae [5]. They range in size from 5 to 10 mm (1 ⁄ 4 to 3 ⁄ 8 inch) in length.
In the Great Lakes, introduced mature adult European valve snails are 5 mm high and 3–5 mm wide. [5] In Europe, this snail has been found up to 7 mm high and 6.5 mm wide, but is usually smaller. [6] Dimensions of the shell are: [4] Valvata piscinalis piscinalis - The width of the shell is 4–5 mm. The height of the shell is 3-4.5 mm.