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Trididemnum
''Trididemnum'' is a genus of tunicates belonging to the family Didemnidae. The genus has cosmopolitan distribution In biogeography, a cosmopolitan distribution is the range of a taxon that extends across most or all of the surface of the Earth, in appropriate habitats; most cosmopolitan species are known to be highly adaptable to a range of climatic and en .... Species Species: References Didemnidae Tunicate genera {{Tunicata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didemnidae
Didemnidae is the largest family of colonial tunicates in the order Aplousobranchia. These marine animals are found in shallow water on the seabed. Members of this family have reduced zooids that form highly integrated and encrusting sheet-like colonies. The body of each zooid is divided into a thorax and an abdomen. They are highly speciose with 578 named species representing a fifth of the species in the class Ascidiacea and members of this family can be found in marine waters across the globe. Didemnidae is the only genera within Chordata to form obligate photo symbiotic relationships which are made with cyanobacteria form the genus Prochloron. Systematics The World Register of Marine Species lists the following genera: * '' Atriolum'' Kott, 1983 * '' Clitella'' Kott, 2001 * '' Coelocormus'' Herdman, 1886 * '' Didemnum'' Savigny, 1816 * '' Diplosoma'' Macdonald, 1859 * '' Leptoclinides'' Bjerkan, 1905 * '' Polysyncraton'' Nott, 1892 * '' Trididemnum'' Della Valle, 1881 De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunicate
Tunicates are marine invertebrates belonging to the subphylum Tunicata ( ). This grouping is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates). The subphylum was at one time called Urochordata, and the term urochordates is still sometimes used for these animals. Despite their simple appearance and very different adult form, their close relationship to the vertebrates is certain. Both groups are chordates, as evidenced by the fact that during their mobile larval stage, tunicates possess a notochord, a hollow dorsal nerve cord, pharyngeal slits, post-anal tail, and an endostyle. They resemble a tadpole. Tunicates are the only chordates that have lost their Myomere, myomeric segmentation, with the possible exception of the seriation of the gill slits. However, Doliolida, doliolids still display segmentation of the muscle bands. Some tunicates live as solitary individuals, but others replicate by budding and be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
