| Octomeris angulosa | |
|---|---|
 | |
| Octomeris angulosa, eightshell barnacle, South Africa | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Thecostraca |
| Subclass: | Cirripedia |
| Order: | Balanomorpha |
| Family: | Chthamalidae |
| Genus: | Octomeris |
| Species: | O. angulosa |
| Binomial name | |
| Octomeris angulosa (Sowerby, 1825) | |
Octomeris angulosa, the eightshell barnacle, is a species of star barnacle in the family Chthamalidae. [1] [2]
Barnacles are a type of arthropod constituting the subclass Cirripedia in the subphylum Crustacea, and are hence related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive settings. Around 1,000 barnacle species are currently known.
Goose barnacles, also called stalked barnacles or gooseneck barnacles, are filter-feeding crustaceans that live attached to hard surfaces of rocks and flotsam in the ocean intertidal zone. Goose barnacles formerly made up the taxonomic order Pedunculata, but research has resulted in the classification of stalked barnacles within multiple orders of the infraclass Thoracica.
The Chthamalidae are a family of chthamaloid barnacles, living entirely in intertidal/subtidal habitats, characterized by a primary shell wall of eight, six, or four plates, lacking imbricating plate whorls, and either membraneous or more rarely calcareous basis. They are not found below immediate subtidal habitats, and more likely are found in the highest tier of shallow-water barnacle fauna. They can be found in the most rigorous wave-washed locations, and some species are found in the surf zone above high tide mark, only receiving water from wave action at high tide.
Acorn barnacle and acorn shell are vernacular names for certain types of stalkless barnacles, generally excluding stalked or gooseneck barnacles. As adults they are typically cone-shaped, symmetrical, and attached to rocks or other fixed objects in the ocean. Members of the barnacle order Balanomorpha are often called acorn barnacles.
Sessilia is an unranked clade of barnacles, comprising the barnacles without stalks, or acorn barnacles. They form a monophyletic group and are probably derived from stalked or goose barnacles. Sessilia is divided into two orders. The Verrucomorpha contain two families, Verrucidae and Neoverrucidae, and the remaining 14 families are in the order Balanomorpha.
The Balanomorpha are an order of barnacles, containing familiar acorn barnacles of the seashore. The order contains these families:
Mussa is a genus of stony coral in the family Faviidae. It is monotypic, being represented by the single species Mussa angulosa, commonly known as the spiny or large flower coral. It is found on reefs in shallow waters in the Caribbean Sea, the Bahamas and the Gulf of Mexico.
Pseudoctomeris sulcatus is a species of barnacle, the only member of the genus Pseudoctomeris. It has an eight-plated shell wall with the rostrum partially fused with adjacent rostrolatera. The suture lines are visible only from the inside, thus in exterior view, the shell appears to have six wall plates. The basis is calcareous. Opercular plates are higher than wide, and not deeply articulated. These features and others show strong relationship to family Pachylasmatidae, and taxonomic revision of Pachylasmatidae has resulted in the transfer of Pseudoctomeris from Chthamalidae to Pachylasmatidae.
Eucalyptus angulosa, also known as the ridge fruited mallee or southern ridge fruited mallee, is a eucalypt that is native to Western Australia. The Noongar peoples know the tree as quarral or kwaral.
Lepas pectinata, the small goose barnacle, is a species of goose barnacle in the family Lepadidae.
Jehlius is a genus of star barnacles in the family Chthamalidae. There are at least two described species in Jehlius.
Chthamalus dentatus, the tooth barnacle, is a species of star barnacle in the family Chthamalidae.
Octomeris is a genus of star barnacles in the family Chthamalidae. There are at least three described species in Octomeris.
Chinochthamalus is a genus of star barnacles in the family Chthamalidae. There is one described species in Chinochthamalus, C. scutelliformis.
Caudoeuraphia is a genus of star barnacles in the family Chthamalidae. There is one described species in Caudoeuraphia, C. caudata.
Hexechamaesipho is a genus of star barnacles in the family Chthamalidae. There is one described species in Hexechamaesipho, H. pilsbryi.
Microeuraphia is a genus of star barnacles in the family Chthamalidae. There are about eight described species in Microeuraphia.
Verruca is a genus of asymmetrical sessile barnacles in the family Verrucidae. There are about 20 described species in Verruca, around half of them extinct.
Verruca stroemia, the wart barnacle, is a species of asymmetrical sessile barnacle in the family Verrucidae.
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