Thoracica is an

infraclass In biological classification, class ( la, classis) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. It is a group of related taxonomic orders. Other well-known ranks in descending order of size are life, domain, kingdom ...

crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group ...

s which contains the most familiar species of

barnacle A barnacle is a type of arthropod constituting the subclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in eros ...

s found on rocky

coast The coast, also known as the coastline or seashore, is defined as the area where land meets the ocean, or as a line that forms the boundary between the land and the coastline. The Earth has around of coastline. Coasts are important zones in n ...

s, such as '' Semibalanus balanoides'' and ''

Chthamalus stellatus ''Chthamalus stellatus'', common name Poli's stellate barnacle, is a species of acorn barnacle common on rocky shores in South West England, Ireland, and Southern Europe. It is named after Giuseppe Saverio Poli. Description ''C. stellatus'' is ...

''. They have six well-developed limbs, and may be either stalked or

sessile Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ...

. The carapace is heavily calcified. The group includes free-living and

commensal Commensalism is a long-term biological interaction (symbiosis) in which members of one species gain benefits while those of the other species neither benefit nor are harmed. This is in contrast with mutualism, in which both organisms benefit fro ...

species.

Classification

This article follows Chan et al. (2021) and WoRMS in placing Thoracica as an infraclass of

Thecostraca Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 described species. Many species have planktonic larvae which become Sessility (zoology), sessile or parasite, parasitic as adults. The most important subgroup ...

and in the following classification of thoracicans down to the level of family: : Infraclass Thoracica Darwin, 1854 :: Superorder Phosphatothoracica Gale, 2019 ::: Order

Iblomorpha Iblomorpha is a small order of barnacles in the class Thecostraca. There are only two families and about eight described species in Iblomorpha. Genera These families, subfamilies, and genera belong to the order Iblomorpha: * Order Iblomorpha Bu ...

Buckeridge & Newman, 2006 :::: Family

Iblidae Iblidae is a family of crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapoda, decapods, ostracoda, seed shrimp, branchiopoda, branchiopods, argulidae, fish lice, krill, remipedes, is ...

Leach, 1825 :::: Family

Idioiblidae Idioiblidae is a family of normal barnacles in the order Iblomorpha. There are at least three genera and about five described species in Idioiblidae. Genera These genera belong to the family Idioiblidae: * '' Chaetolepas'' Studer, 1889 * '' Chi ...

Buckeridge & Newman, 2006 ::: Order † Eolepadomorpha Chan et al., 2021 :::: Family † Eolepadidae Buckeridge, 1983 :::: Family † Praelepadidae Chernyshev, 1930 :: Superorder Thoracicalcarea Gale, 2015 ::: Order Balanomorpha Pilsbry, 1916 :::: Superfamily Balanoidea Leach, 1817 ::::: Family Balanidae Leach, 1817 ::::: Family

Pyrgomatidae Pyrgomatidae is a family of barnacles A barnacle is a type of arthropod constituting the subclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in sha ...

Gray, 1825 :::: Superfamily Chthamaloidea Darwin, 1854 ::::: Family

Catophragmidae The Catophragmidae are a family of barnacles in the superfamily Chthamaloidea with eight shell wall plates (rostrum, carina, paired rostrolatera, carinolatera I and carinolatera II), surrounded by several whorls of imbricating plates. The b ...

Utinomi, 1968 ::::: Family Chionelasmatidae Buckeridge, 1983 ::::: Family

Chthamalidae 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 rare ...

Darwin, 1854 ::::: Family

Pachylasmatidae Pachylasmatidae is a family of symmetrical sessile barnacles in the order Balanomorpha. There are about 10 genera and at least 30 described species in Pachylasmatidae. Genera These genera belong to the family Pachylasmatidae: * '' Atetrapachyla ...

Utinomi, 1968 ::::: Family Waikalasmatidae Ross & Newman, 2001 :::: Superfamily Coronuloidea Leach, 1817 ::::: Family

Austrobalanidae ''Austrobalanus'' is a genus of symmetrical sessile barnacles in the family Austrobalanidae, the sole genus of the family. There are at least three described species in ''Austrobalanus''. Species These species belong to the genus ''Austrobalanus ...

Newman & Ross, 1976 ::::: Family Bathylasmatidae Newman & Ross, 1971 ::::: Family Chelonibiidae Pilsbry, 1916 ::::: Family

Coronulidae Whale barnacles are species of acorn barnacle that belong to the family (biology), family Coronulidae. They typically attach to baleen whales, and sometimes settle on toothed whales. The whale barnacles diverged from the turtle barnacles about t ...

Leach, 1817 ::::: Family Tetraclitidae Gruvel, 1903 :::: Superfamily Elminioidea Chan et al., 2021 ::::: Family Elminiidae Foster, 1982 :::: Superfamily † Pachydiadematoidea Chan et al., 2021 ::::: Family † Pachydiadematidae Chan et al., 2021 ::: Order

Calanticomorpha Calanticomorpha is an order of acorn barnacles in the class Thecostraca. There are 3 families and more than 90 described species in Calanticomorpha. Families These families and genera belong to the order Calanticomorpha: : Order Calanticomorpha C ...

Chan et al., 2021 :::: Family Calanticidae Zevina, 1978 :::: Family † Cretiscalpellidae Buckeridge, 1983 :::: Family † Titanolepadidae Gale & Sørensen, 2015 ::: Order

Pollicipedomorpha Pollicipedomorpha is an order of pedunculated barnacles in the class Thecostraca. There are 3 families and more than 30 described species in Pollicipedomorpha. Families These families and genera belong to the order Pollicipedomorpha: : Order Poll ...

Chan et al., 2021 :::: Family

Lithotryidae ''Lithotrya'' is a genus of crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapoda, decapods, ostracoda, seed shrimp, branchiopoda, branchiopods, argulidae, fish lice, krill, remipede ...

Gruvel, 1905 :::: Family Pollicipedidae Leach, 1817 :::: Family † Zeugmatolepadidae Newman, 1996 ::: Order

Scalpellomorpha Scalpellomorpha is an order of acorn barnacles in the class Thecostraca Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 described species. Many species have planktonic larvae which become Sessility (zoology ...

Buckeridge & Newman, 2006 :::: Superfamily Lepadoidea Chan et al., 2021 ::::: Family

Heteralepadidae Heteralepadidae is a family of goose barnacle 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 ...

Nilsson-Cantell, 1921 ::::: Family

Lepadidae Lepadidae is a family of goose barnacles, erected by Charles Darwin in 1852. There are about five genera and more than 20 described species in Lepadidae. Genera These genera belong to the family Lepadidae: * ''Conchoderma'' von Olfers, 1814 (wha ...

Darwin, 1852 ::::: Family

Malacolepadidae Malacolepadidae is a family of acorn barnacles in the order Scalpellomorpha Scalpellomorpha is an order of acorn barnacles in the class Thecostraca Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 describ ...

Hiro, 1937 ::::: Family

Poecilasmatidae Poecilasmatidae is a family of goose barnacle 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 ...

Annandale, 1909 ::::: Family

Rhizolepadidae ''Rhizolepas'' is a genus of crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapoda, decapods, ostracoda, seed shrimp, branchiopoda, branchiopods, argulidae, fish lice, krill, remiped ...

Zevina, 1980 :::: Superfamily Neolepadoidea Chan et al., 2021 ::::: Family

Neobrachylepadidae ''Neobrachylepas'' is a monotypic genus of crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapoda, decapods, ostracoda, seed shrimp, branchiopoda, branchiopods, argulidae, fish lice, ...

Newman & Yamaguchi, 1995 ::::: Family

Neolepadidae Neolepadidae is a family of crustaceans belonging to the order Scalpellomorpha Scalpellomorpha is an order of acorn barnacles in the class Thecostraca Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 desc ...

Yamaguchi, Newman & Hashimoto, 2004 ::::: Family

Neoverrucidae Neoverrucidae is a family of crustaceans belonging to the order Scalpellomorpha Scalpellomorpha is an order of acorn barnacles in the class Thecostraca Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 des ...

Newman, 1989 in Hessler & Newman, 1989 ::::: Family Probathylepadidae Ren & Sha, 2015 :::: Superfamily Scalpelloidea Chan et al., 2021 ::::: Family

Scalpellidae Scalpellidae is a family of acorn barnacles in the order Scalpellomorpha Scalpellomorpha is an order of acorn barnacles in the class Thecostraca Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 described ...

Pilsbry, 1907 ::::: Family † Proverrucidae Newman, 1989 in Hessler & Newman, 1989 ::: Order

Verrucomorpha Verrucomorpha is an order of asymmetrical sessile barnacles in the class Thecostraca. They are typically found in deeper and deep-sea habitats. There are 2 families and more than 100 described species in Verrucomorpha. Families These families be ...

Pilsbry, 1916 :::: Family

Verrucidae Verrucidae is a family of asymmetrical sessile barnacles in the order Verrucomorpha. There are about 14 genera and more than 90 described species in Verrucidae. Genera These genera belong to the family Verrucidae: * '' Altiverruca'' Pilsbry, 1 ...

Darwin, 1854 :::: Family † Eoverrucidae Gale, 2020 ::: Order †

Archaeolepadomorpha Archaeolepadomorpha is an extinct order of barnacles in the class Thecostraca Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 described species. Many species have planktonic larvae which become Sessility (z ...

Chan et al., 2021 :::: Family † Archaeolepadidae Gale, 2019 :::: Family † Myolepadidae Gale, 2015 in Gale & Sørensen, 2015 :::: Family † Stramentidae Withers, 1920 ::: Order †

Brachylepadomorpha Brachylepadidae is an extinct family of barnacles in the order Brachylepadomorpha, the sole family in the order. There are about 7 genera and more than 20 described species in Brachylepadidae. Genera These genera belong to the family Brachylepad ...

Withers, 1923 :::: Family † Brachylepadidae Woodward, 1901

References

{{Taxonbar, from=Q283537 Barnacles Arthropod superorders