| Nacella concinna | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Patellogastropoda |
| Family: | Nacellidae |
| Genus: | Nacella |
| Species: | N. concinna |
| Binomial name | |
| Nacella concinna (Strebel, 1908) | |
| Synonyms | |
| |
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. [1]
The shell of Nacella concinna grows to about 6 centimetres (2.4 in) long with deep water specimens being rather smaller. It is an elongated ovate, moderately elevated cone with a low apex somewhat towards the anterior margin and angled in that direction. There are about 30 faint radial ribs and a series of fine concentric lines that indicate the annual growth rings. The exterior of the shell is varying shades of pale brown and grey and the interior is dark purplish-brown in deep water specimens but creamy-brown in those from shallow water. The mantle has a fringe of short tentacles. [2]
Nacella concinna is found on the seabed of the Scotia Sea between Tierra del Fuego and the Antarctic Peninsula. The range includes South Georgia, the South Orkneys, the South Shetlands, Bouvet Island, Seymour Island, Paulet Island, Wandel Island, Anvers Island and Petermann Island. The depth range varies from the inter-tidal zone down to 935 metres (3,068 ft) though most specimens come from shallow waters a few metres deep. [2]
Nacella concinna moves around on rocks and soft substrates feeding on algae and diatoms. Its growth rate is slow and it is said to grow to 41 millimetres (1.6 in) in 21 years and live as long as 60 years. [3] It is gonochoristic, individuals being either male or female, and fertilisation is external. The larval development has been little studied. Spawning takes place in the spring algal bloom period. Mature adults often synchronise their spawning, forming spawning towers or groups of up to 35 individuals which may persist for a week or more. These structures are considered likely to improve fertilisation rates as sperm flows have been observed to cascade down the towers in calm water situations. Even in moving water, sperm concentrations are higher and fertilisation is more likely to occur. [3]
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.
Diodora cayenensis, the Cayenne keyhole limpet, is a species of small to medium-sized sea snail or limpet, a western Atlantic marine prosobranch gastropod mollusk in the family Fissurellidae, the keyhole limpets.
Nacella macquariensis is a species of true limpet, a marine gastropod mollusc in the family Nacellidae. It is found on the lower foreshore and in the shallow sub-littoral zone of certain islands in the southern Indian Ocean and Southern Ocean.
Nacella kerguelenensis is a southern, cold-water species of limpet, a marine gastropod mollusc in the family Nacellidae, the true limpets.
Cellana is a genus of sea snails or limpets, marine gastropod molluscs in the family Nacellidae, the true limpets.
Notoacmea pileopsis, commonly known as the black-edged limpet, is a species of sea snail or true limpet, a marine gastropod mollusc in the family Lottiidae, one of the families of true limpets.
Nacella is a southern, cold-water genus of true limpets, marine gastropod molluscs in the family Nacellidae, the true limpets.
Micrelenchus purpureus, common name the red opal top shell, is a species of medium-sized sea snail, a marine gastropod mollusc in the family Trochidae.
Cellana ornata is a species of true limpet, a marine gastropod mollusc in the family Nacellidae, one of the families of true limpets.
Cellana strigilis is a species of large limpet, a marine gastropod mollusc in the family Nacellidae, one of the families of true limpets.
Nacella deaurata is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Nacellidae, one of the families of true limpets.
Nacella magellanica is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Nacellidae, one of the families of true limpets.
Scutellastra flexuosa is a species of sea snail, a true limpet, a marine gastropod mollusc in the family Patellidae, one of the families of true limpets.
Iothia is a genus of sea snails, the true limpets, marine gastropod mollusks in the family Lepetidae.
Pareuthria atrata is a species of sea snail, a marine gastropod mollusk in the family Cominellidae.
Fuegotrophon pallidus is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Xymenopsis buccineus is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Laternula elliptica is a species of saltwater clam, a marine bivalve mollusc in the family Laternulidae, the lantern shells. It is the largest bivalve found under the surface of the seabed in the Southern Ocean.
Cantharidus antipodum is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Photinula coerulescens is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
| Authority control databases: National |
|---|
