- Source: Semi-slug
Semi-slugs, also spelled semislugs, are land gastropods whose shells are too small for them to retract into, but not quite vestigial. The shell of some semi-slugs may not be easily visible on casual inspection, because the shell may be covered over with the mantle.
This is a type of gastropod that is intermediate between a slug (without an external shell) and a land snail (with a large enough shell to retract completely into).
There exist a number of gastropod families that have semi-slug species. There exist about 1,000 species of semi-slugs in comparison to about only 500 species of slugs.
Examples
Semi-slugs have a worldwide distribution and have evolved in several families; genera include:
Palearctic and Nearctic
family Parmacellidae: Cryptella
family Vitrinidae: Eucobresia, Semilimax, Vitrina, Vitrinobrachium
Asia - Pacific
family Ariophantidae: Parmarion, Ratnadvipia, Varadia
family Helicarionidae: Attenborougharion, Helicarion, Howearion, Ibycus, Parmellops, Ubiquitarion
Semi-slugs also exist but are exceptional in the Camaenidae.
Neotropics
family Amphibulimidae: Amphibulima, Gaeotis
family Xanthonychidae: Cryptostrakon, Semiconchula, Xanthonyx
family Pleurodontidae: Coloniconcha prima
Tropical Africa
family Urocyclidae: Gymnarion
See also
"Leatherleaf slugs" - Veronicellidae
References
Kata Kunci Pencarian:
- Siput telanjang
- Senapan gentel
- Transformers: Age of Extinction
- Kupu-kupu
- Limbah padat
- Daftar peluru kendali darat ke udara
- Daftar karakter SpongeBob SquarePants
- Grunge
- Daftar permainan arkade
- Katak-puru eropa
- Semi-slug
- Slug
- Metal Slug
- Leucochloridium paradoxum
- Snail
- Slug barrel
- Love dart
- Gastropod shell
- Varadia amboliensis
- Ubiquitarion iridis
