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Asymmetron Lucayanum
''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] |
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] |
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 * †''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-AF ...'' Oelofsen & Loock, 1981 References {{Taxonbar, from1=Q2747865, from2=Q61882392 Cephalochordata ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asymmetron Inferum
''Asymmetron'' is a genus of lancelets belonging to the family Branchiostomatidae. The species of this genus are found in world oceans. Species: *'' Asymmetron inferum'' *''Asymmetron lucayanum ''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, ...'' References {{Taxonbar, from=Q9635660 Cephalochordata ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asymmetron Lucayanum
''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] |
