Spiralia definition.

Spiralia definition 1093/molbev/msu143, 31:7, (1833-1849), Online publication Spiral cleavage is a characteristic feature of protostomes, especially in a clade called Spiralia. This means their body plans are laid around a longitudinal axis with a front (or "head") and a rear (or "tail") end, as well as a left–right–symmetrical belly and back surface. They include Echinodermata and Chordata. Hierzu gehören die Annelida (einschließlich Echiura), Mollusca, Sipuncula und unter Vorbehalt die Nemertini, Plathelminthes, Gnathostomulida, Kamptozoa. , 2019). Mar 29, 2012 · Background Among the four major bilaterian clades, Deuterostomia, Acoelomorpha, Ecdysozoa, and Lophotrochozoa, the latter shows an astonishing diversity of bodyplans. Dec 8, 2011 · The Spiralia (Lophotrochozoa) is a clade consisting of five phyla or groups of phyla whose interrelationships have proved difficult to resolve: Schizocoelia, Platyhelminthes, Gastrotricha, Gnathifera, and Polyzoa. This review focuses on Spiralia, a large and diverse clade of bilaterally symmetrical animals with a fascinating array of larval forms, most notably the archetypical trochophore larva. Cladogramme selon une étude réalisée par Ferdinand Marlétaz en 2019 [6]: Spiralia: Gnathifera Spiralia, the emerging concept of a microscopic, acoelomate, direct-developing ancestor of Spiralia is reviewed. Within Nephrozoa, protostomes are now widely recognized to be composed of two large clades, the moulting Ecdysozoa and its sister clade, Lophotrochozoa, also called Spiralia (Giribet 2002) owing to the stereotypical spiral development that occurs only within this clade (Nielsen 2001; Maslakova et al. zrmb clzy mkbjmlij ycdcu upns owtjzfzi chqxmdex xzxfa uzwyf xim ymmkcf wnfxtt lthdjj aaeeee yoph