|
Thecostraca
Thecostraca is a class of marine invertebrates containing over 2,200 described species. Many species have planktonic larvae which become sessile or parasitic as adults. The most important subgroup are the barnacles (subclass Cirripedia), constituting a little over 2,100 known species. The subgroup Facetotecta contains a single genus, ''Hansenocaris'', known only from the tiny planktonic nauplii called "y-larvae". These larvae have no known adult form, though it is suspected that they are parasites, and their affinity is uncertain. Some researchers believe that they may be larval tantulocaridans. No larval tantulocaridans are currently known. The group Ascothoracida contains about 110 species, all parasites of coelenterates and echinoderms. Classification This article follows Chan et al. (2021) and the World Register of Marine Species in placing Thecostraca as a class of Crustacea and in the following classification of thecostracans down to the level of orders. Previously, Theco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Facetotecta
Facetotecta is a poorly known subclass of thecostracan crustaceans. The adult forms have never been recognised, and the group is known only from its larvae, the "y- nauplius" and "y-cyprid" larvae. They are mostly found in the north Atlantic Ocean, neritic waters around Japan, and the Mediterranean Basin, where they also survive in brackish water. History The German zoologist Christian Andreas Victor Hensen first collected facetotectans from the North Sea in 1887, but assigned them to the copepod family Corycaeidae; later Hans Jacob Hansen named them "y-nauplia", assuming them to be the larvae of unidentified barnacles. More recently, it has been suggested that, since there is a potential gap in the tantulocarid life cycle, y-larvae may be the larvae of tantulocarids. However, this would be "a very tight fit", and it is more likely that the adult forms have not yet been seen. Genetic analysis using 18S ribosomal DNA reveal Facetotecta to be the sister group to the remaining T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 erosive settings. They are sessile (nonmobile) and most are suspension feeders, but those in infraclass Rhizocephala are highly specialized parasites on crustaceans. They have four nektonic (active swimming) larval stages. Around 1,000 barnacle species are currently known. The name is Latin, meaning "curl-footed". The study of barnacles is called cirripedology. Description Barnacles are encrusters, attaching themselves temporarily to a hard substrate or a symbiont such as a whale ( whale barnacles), a sea snake ('' Platylepas ophiophila''), or another crustacean, like a crab or a lobster (Rhizocephala). The most common among them, "acorn barnacles" ( Sessilia), are sessile where they grow their shells directly onto the substrate. Peduncul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirripedia
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 erosive settings. They are sessile (nonmobile) and most are suspension feeders, but those in infraclass Rhizocephala are highly specialized parasites on crustaceans. They have four nektonic (active swimming) larval stages. Around 1,000 barnacle species are currently known. The name is Latin, meaning "curl-footed". The study of barnacles is called cirripedology. Description Barnacles are encrusters, attaching themselves temporarily to a hard substrate or a symbiont such as a whale ( whale barnacles), a sea snake ('' Platylepas ophiophila''), or another crustacean, like a crab or a lobster (Rhizocephala). The most common among them, "acorn barnacles" ( Sessilia), are sessile where they grow their shells directly onto the substrate. Pedunculate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maxillopoda
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 can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans ( Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacea
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 can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascothoracida
Ascothoracida is a small group of crustaceans, comprising around 100 species. They are found throughout the world, and are parasites on cnidarians and echinoderms. Ascothoracida was previously ranked as an order within the infraclass Cirripedia ( barnacles), but now both Ascothoracida and Cirripedia are considered separate subclasses. Those two subclasses, along with Facetotecta, make up the class Thecostraca. The thorax of Ascothoracida species has six pair of biramous appendages, while the abdomen has four segments and a terminal telson The telson () is the posterior-most division of the body of an arthropod. Depending on the definition, the telson is either considered to be the final segment of the arthropod body, or an additional division that is not a true segment on accou ... with a caudal furca. This arrangement is similar to that seen in copepods. In addition, there is a bivalved carapace, which is expanded in females. References External links * Maxillo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Abel Gruvel
Jean Abel Gruvel (14 February 1870 in Le Fleix – 18 August 1941 in Dinard) was a French marine biologist known for his research of cirripedes. Biography In 1894 he obtained his doctorate in sciences, and later taught classes in zoology for three years at the faculty of sciences at Bordeaux. In 1902 he founded the ''Société d'études et de vulgarisation de la zoologie agricole'' in Bordeaux. Later on, he was a professor at the ''Muséum national d'histoire naturelle'' in Paris, and was chair of the commission for the regulation of whaling for French West Africa and of the committee for the protection of colonial fauna and flora.Abel Gruvel Académie des sciences d'outre-me ...
[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Buckeridge & Newman, 2006 ** Family Iblidae Leach, 1825 *** Subfamily Iblinae Leach, 1825 **** Genus Ibla Leach, 1825 *** Subfamily Neoiblinae Buckeridge & Newman, 2006 **** Genus Neoibla Buckeridge & Newman, 2006 ** 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 *** Subfamily Chaetolepadinae Buckeridge & Newman, 2006 **** Genus Chaetolepas Studer, 1889 **** Genus Chitinolepas Buckeridge & Newman, 2006 *** Subfamily Idioiblinae Buckeridge & Newman, 2006 **** Genus Idioibla Buckeridge & N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eolepadomorpha
Eolepadomorpha is an extinct order of barnacles in the class Thecostraca Thecostraca is a class of marine invertebrates containing over 2,200 described species. Many species have planktonic larvae which become sessile or parasitic as adults. The most important subgroup are the barnacles (subclass Cirripedia), constit .... There are 2 families and about 14 described species in Eolepadomorpha. Families These families and genera belong to the order Eolepadomorpha: : Order Eolepadomorpha Chan et al., 2021 :: Family Eolepadidae Buckeridge, 1983 ::: Genus Eolepas Withers, 1928 ::: Genus Toarcolepas Gale & Schweigert, 2015 :: Family Praelepadidae Chernyshev, 1930 ::: Genus Illilepas Schram, 1986 ::: Genus Praelepas Chernyshev, 1930 References Barnacles {{Paleo-crustacean-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thoracica
Thoracica is an infraclass of crustaceans which contains the most familiar species of barnacles found on rocky coasts, such as '' Semibalanus balanoides'' and ''Chthamalus stellatus''. They have six well-developed limbs, and may be either stalked or sessile. The carapace is heavily calcified. The group includes free-living and commensal species. Classification This article follows Chan et al. (2021) and WoRMS in placing Thoracica as an infraclass of Thecostraca and in the following classification of thoracicans down to the level of family: : Infraclass Thoracica Darwin, 1854 :: Superorder Phosphatothoracica Gale, 2019 ::: Order Iblomorpha Buckeridge & Newman, 2006 :::: Family Iblidae Leach, 1825 :::: Family Idioiblidae 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 B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizocephala
Rhizocephala are derived barnacles that parasitise mostly decapod crustaceans, but can also infest Peracarida, mantis shrimps and thoracican barnacles, and are found from the deep ocean to freshwater. Together with their sister groups Thoracica and Acrothoracica, they make up the subclass Cirripedia. Their body plan is uniquely reduced in an extreme adaptation to their parasitic lifestyle, and makes their relationship to other barnacles unrecognisable in the adult form. The name Rhizocephala derives from the Ancient Greek roots (, "root") and (, "head"), describing the adult female, which mostly consists of a network of thread-like extensions penetrating the body of the host. Description and lifecycle As adults they lack appendages, segmentation, and all internal organs except gonads, a few muscles, and the remains of the nervous system. Females also have a cuticle, which is never shed. Other than the minute larval stages, there is nothing identifying them as crustaceans or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithoglyptida
Lithoglyptida is an order of barnacles in the class Thecostraca. There are 2 families and more than 40 described species in Lithoglyptida. Taxonomy These families, subfamilies, and genera belong to the order Lithoglyptida: : Family Lithoglyptidae Aurivillius, 1892 :: Subfamily Berndtiinae Utinomi, 1950 ::: Genus Berndtia Utinomi, 1950 ::: Genus Weltneria Berndt, 1907 :: Subfamily Kochlorininae Gruvel, 1905 ::: Genus Kochlorine Noll, 1872 ::: Genus Kochlorinopsis Stubbings, 1967 :: Subfamily Lithoglyptinae Aurivillius, 1892 ::: Genus Auritoglyptes Kolbasov & Newman, 2005 ::: Genus Balanodytes Utinomi, 1950 ::: Genus Lithoglyptes Aurivillius, 1892 : Family Trypetesidae Trypetesidae is a family of crustaceans belonging to the order Lithoglyptida Lithoglyptida is an order of barnacles in the class Thecostraca Thecostraca is a class of marine invertebrates containing over 2,200 described species. Many specie ... Stebbing, 1910 :: Genus Tomlinsonia Turquier, 1985 :: G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
