Tunicata
 Cambrian – presente, (forsan Ediacaran, 557 Ma[3][4]) | ||||||
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| Tunicata Lamarck, 1816[5] | ||||||
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Tunicata es un subphylo de Chordata Olfactores.
Tunicates son marin animales invertebrate. Pote haber un modo de vita pelagic o sessile epibenthic (in le caso del adulte ascidianes). Alcun tunicates son solitari, altere se replica per gemmation e forma colonias de zoides. Lor mobile larvas ha un notochorda e resimila un larva de rana.
Tunicates son characterisate per lor "tunica" (unic copertura externe), un cuticula constituite de proteinas e complex carbohydratos (cuje tunicina, un typo de cellulosa). In alcun species, tunica es tenue, translucido e gelatinose; in altere es spisse e rigide. Al contrario de altere exoskeleto, le tunica pote crescer con le animal.
Phylogenia
[modificar | modificar fonte]Le studio del phylogenia molecular monstra que le previe classe del Ascidiacea non es monophyletic. Le cladogramma actualisate es le sequente[6][1]:
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Galeria
[modificar | modificar fonte]-
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catena de salpas -
colonia circular de salpas -
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Referentias
[modificar fonte]- ↑ 1,0 1,1 Karma Nanglu, Rudy Lerosey-Aubril, James C. Weaver, Javier Ortega-Hernández (2023-06-06). "A mid-Cambrian tunicate and the deep origin of the ascidiacean body plan" (in en). Nature communications. doi:.
- ↑ "Geochronological constraint on the Cambrian Chengjiang biota, South China" (in en) (2018). Journal of the Geological Society 175 (4): 659–666. doi:. ISSN 0016-7649. Bibcode: 2018JGSoc.175..659Y.
- ↑ "A new metazoan from the Vendian of the White Sea, Russia, with possible affinities to the ascidians" (2012). Paleontological Journal 46: 1–11. doi:.
- ↑ "New Ediacaran fossils from the Ukraine, some with a putative tunicate relationship" (in en) (2021-12-01). PalZ 95 (4): 623–639. doi:. ISSN 1867-6812.
- ↑ Nielsen, C. (2012). "The authorship of higher chordate taxa". Zoologica Scripta 41 (4): 435–436. doi:.
- ↑ 6,0 6,1 Giribet, Gonzalo (2018-04-27). "Phylogenomics resolves the evolutionary chronicle of our squirting closest relatives". BMC Biology 16 (1): 49. doi:. ISSN 1741-7007. PMID 29703197.