| Iothia emarginuloides | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Patellogastropoda |
| Superfamily: | Lottioidea |
| Family: | Lepetidae |
| Genus: | Iothia |
| Species: | I. emarginuloides |
| Binomial name | |
| Iothia emarginuloides | |
| Synonyms [1] | |
| |
Iothia emarginuloides is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lepetidae, one of the families of true limpets. This species was previously known as Iothia coppingeri.
The type specimens of I. emarginuloides (Philippi, 1868) and I. coppingeri (E.A. Smith, 1881) are very similar in morphology, and were collected only 400 km (250 mi) apart; as long ago as 1908 this led to the recognition that they were probably the same species. Despite this, they continued to be treated as two separate species until 2011, when Nakano et al. researched the genus and brought them into synonymy. I. emarginuloides was described before I. coppingeri, [2] so by the rules of zoological nomenclature, the earlier name took priority. [3]
I. emarginuloides is a small, broadly ovate, cap-shaped limpet, with a length of about 5.5 mm (0.22 in) and width of 4.5 mm (0.18 in). The apex of the shell is towards the anterior end, and is rather acute, but does not curl over. The shell is thin, and has fine sculptured lines radiating from the apex which formed the basis for the species' descriptive name, emarginuloides, "as if minutely emarginate, or finely notched". There are also irregular, concentric growth rings. The margin is smooth apart from the fine crenelations produced by the radial sculpture. The shell is a "dirty white" colour, with a few greyish concentric bands. [4] Although limpets in the family Lepetidae are commonly known as "blind limpets", both this species and the closely related Iothia fulva have small, black-pigmented eyes, situated close to the base of the tentacles. [2]
I. emarginuloides is known from Antarctica (the Weddell Sea) and southern Chile. [5] Its distribution is probably circum-Antarctic, with its known range extending from the Kerguelen Islands to the Strait of Magellan area. [6] All records are from water shallower than 2,500 m (8,200 ft). [4] It is the commonest animal found living on the red alga Phyllophora antarctica under the sea ice in the vicinity of the Vestfold Hills, Antarctica. [7]
The Patellogastropoda, common name true limpets and historically called the Docoglossa, are members of a major phylogenetic group of marine gastropods, treated by experts either as a clade or as a taxonomic order.
Phenacolepadidae is a family of small sea snails or false limpets, marine gastropod mollusks in the clade Cycloneritimorpha.
Lottioidea is a superfamily of sea snails or limpets, marine gastropod mollusks in the clade Patellogastropoda, the true limpets.
Tectura is a genus of small to medium-sized sea snails, true limpets, marine gastropod mollusks in the family Lottiidae. Tectura comes from Latin tegō.
Pyropelta musaica is a species of small sea snail, a deep-water limpet, a marine gastropod mollusks in the family Pyropeltidae.
Tentaoculus granulatus is a species of sea snail, deep-sea limpet, a marine gastropod mollusk in the family Pseudococculinidae.
Nacella concinna is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Nacellidae, one of the families of true limpets.
Scurria variabilis is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lottiidae, one of the families of true limpets.
Lepetodrilus atlanticus is a species of small, deep-sea sea snail, a hydrothermal vent limpet, a marine gastropod mollusk in the family Lepetodrilidae.
Hirtopelta hirta is a species of sea snail, a marine gastropod mollusk in the family Peltospiridae.
Iothia is a genus of sea snails, the true limpets, marine gastropod mollusks in the family Lepetidae.
Lepeta is a genus of sea snails, the true limpets, marine gastropod mollusks in the family Lepetidae.
Phymorhynchus is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
Calliotropis pelseneeri is a species of sea snail, a marine gastropod mollusk in the family Eucyclidae.
Cornisepta is a genus of sea snails, marine gastropod mollusks in the family Fissurellidae, the keyhole limpets.
Margarites huloti is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.
Divia briandi is a species of sea snail, a marine gastropod mollusk in the family Phenacolepadidae.
Savatieria coppingeri is a species of sea snail, a marine gastropod mollusk in the family Buccinidae.
Kanoia is a genus of sea snails, marine gastropod mollusks in the family Cataegidae.
Hyalopatina is a genus of very small sea snails or limpets, marine gastropod mollusks in the subfamily Phenacolepadinae of the family Phenacolepadidae.