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Branchiostomatidae
Branchiostomatidae is a family of lancelets The lancelets ( or ), also known as amphioxi (singular: amphioxus ), consist of some 30 to 35 species of "fish-like" benthic filter feeding chordates in the order Amphioxiformes. They are the modern representatives of the subphylum Cephalochord ... belonging to the class Leptocardii, order unknown. Genera: * ''Asymmetron'' Andrews, 1893 * ''Branchiostoma'' Costa, 1834 * ''Epigonichthys'' Peters, 1876 * ''Epigonopterus'' Jordan & Gilbert, 1882 * †''Palaeobranchiostoma'' Oelofsen & Loock, 1981 References {{Taxonbar, from1=Q2747865, from2=Q61882392 Cephalochordata ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lancelets
The lancelets ( or ), also known as amphioxi (singular: amphioxus ), consist of some 30 to 35 species of "fish-like" benthic filter feeding chordates in the order Amphioxiformes. They are the modern representatives of the subphylum Cephalochordata. Lancelets closely resemble 530-million-year-old ''Pikaia'', fossils of which are known from the Burgess Shale. Zoologists are interested in them because they provide evolutionary insight into the origins of vertebrates. Lancelets contain many organs and organ systems that are closely related to those of modern fish, but in more primitive form. Therefore, they provide a number of examples of possible evolutionary exaptation. For example, the gill-slits of lancelets are used for feeding only, and not for respiration. The circulatory system carries food throughout their body, but does not have red blood cells or hemoglobin for transporting oxygen. Lancelet genomes hold clues about the early evolution of vertebrates: by comparing genes fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptocardii
The lancelets ( or ), also known as amphioxi (singular: amphioxus ), consist of some 30 to 35 species of "fish-like" benthic filter feeding chordates in the order Amphioxiformes. They are the modern representatives of the subphylum Cephalochordata. Lancelets closely resemble 530-million-year-old ''Pikaia'', fossils of which are known from the Burgess Shale. Zoologists are interested in them because they provide evolutionary insight into the origins of vertebrates. Lancelets contain many organs and organ systems that are closely related to those of modern fish, but in more primitive form. Therefore, they provide a number of examples of possible evolutionary exaptation. For example, the gill-slits of lancelets are used for feeding only, and not for respiration. The circulatory system carries food throughout their body, but does not have red blood cells or hemoglobin for transporting oxygen. Lancelet genomes hold clues about the early evolution of vertebrates: by comparing genes from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asymmetron
''Asymmetron'' is a genus of lancelets belonging to the family Branchiostomatidae Branchiostomatidae is a family of lancelets belonging to the class Leptocardii, order unknown. Genera: * ''Asymmetron'' Andrews, 1893 * '' Branchiostoma'' Costa, 1834 * ''Epigonichthys'' Peters, 1876 * '' Epigonopterus'' Jordan & Gilbert, 1882 * .... The species of this genus are found in world oceans. Species: *'' Asymmetron inferum'' *'' Asymmetron lucayanum'' References {{Taxonbar, from=Q9635660 Cephalochordata ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Branchiostoma
''Branchiostoma'' is one of the few living genera of lancelets ( order Amphioxiformes). It is the type genus of family Branchiostomatidae. These small vaguely eel- or snake-like animals are close relatives of vertebrates. The scientific name means "gill-mouth", referring to their anatomy – unlike vertebrates, they do not have a true head (with a skull capsule, eyes, nose, a well-developed brain etc.), but merely a mouth adjacent to the gill-slits, with the slightly enlarged anterior end of the dorsal nerve cord above and in front of them. It dislikes the light. Like all lancelets, they are filter feeders that hide in the sediment most of the time. The genus inhabits coastal waters throughout the world. Species * '' Branchiostoma africae'' Hubbs, 1927 * '' Branchiostoma arabiae'' Webb, 1957 * '' Branchiostoma bazarutense'' Gilchrist, 1923 * '' Branchiostoma belcheri'' Gray, 1847 (Belcher's lancelet) * ''Branchiostoma bennetti'' Boschung & Gunter, 1966 (Mud lancelet) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epigonichthys
''Epigonichthys'' is a genus of lancelets belonging to the family Branchiostomatidae. The genus was first described in 1876 by Wilhelm Peters.Peters, W. 1876. Über ''Epigonichthys cultellus'', eine neue Gattung und Art der Leptocardii. ''Monatsberichte der Deutschen Akademie der Wissenschaften zu Berlin'' 1875: 322-326 22 The type species is ''Epigonichthys cultellus.'' The species of this genus are found in Central America, Malesia, Australia. Species: *''Epigonichthys australis'' *''Epigonichthys bassanus'' *''Epigonichthys cingalensis'' *''Epigonichthys cultellus'' *''Epigonichthys hectori'' *''Epigonichthys maldivensis ''Epigonichthys'' is a genus of lancelets belonging to the family Branchiostomatidae. The genus was first described in 1876 by Wilhelm Peters.Peters, W. 1876. Über ''Epigonichthys cultellus'', eine neue Gattung und Art der Leptocardii. ''Monatsb ...'' References {{Taxonbar, from=Q10273300 Cephalochordata Animals described in 1876 Taxa named ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeobranchiostoma
''Palaeobranchiostoma hamatotergum'' is an extinct cephalochordate from the Early Permian-aged Whitehill Formation in South Africa.Oelofsen, B. W., and J. C. Loock. "A FOSSIL CEPHALOCHORDATE FROM THE EARLY PERMIAN WHITEHILL FORMATION OF SOUTH-AFRICA." South African Journal of Science 77.4 (1981): 178-180/ref> It is known from a single, 11 mm long specimen found in black shale.Blieck, Alain. "At the origin of chordates." Geobios 25.1 (1992): 101-113. See also *''Pikaia'' *''Cathaymyrus ''Cathaymyrus'' is a genus of Early Cambrian cephalochordate known from the Chengjiang locality in Yunnan Province, China. Both species have a long segmented body with no distinctive head. The segments resemble the v-shaped muscle blocks found in ...'' References {{Taxonbar, from=Q30594213 Permian animals of Africa Cephalochordata Prehistoric chordate genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
