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Cycloneuralia is a clade of ecdysozoan animals including the Scalidophora ( Kinorhynchans, Loriciferans, Priapulids) and the Nematoida ( nematodes, Nematomorphs ). [1] [2] It may be paraphyletic, or may be a sister group to Panarthropoda. Or perhaps Panarthropoda is paraphyletic with respect to Cycloneuralia. [3]
Ecdysozoa (grč. ἔκδυσις - ékdysis = nastrešnica + ζῷον – zōon = životinja) je grupa protostomnih životinja, uključujući Arthropoda a(insekti, Chelicerata, rakove i Myriapoda – stonoge ), Nematoda, i nekoliko manjih koljena.
Ecdysozoa é um clado de animais protostômios que reúne os artrópodes, nemátodes e outros sete filos. Inclui organismos que têm de se desfazer do exosqueleto "apertado" e formar um novo para poderem crescer, um processo designado muda ou ecdise.
If the Ecdysozoa hypothesis is correct, then segmentation of arthropods and annelids either has evolved convergently or has been inherited from a much older ancestor and subsequently lost in several other lineages, such as the non-arthropod members of the Ecdysozoa. Evolution of fossil arthropods
Ecdysozoa (česky ekdysozoa) je monofyletická skupina živočišných prvoústých kmenů . Charakteristika. Skupina Ecdysozoa je charakterizovaná chitinovou kutikulou, která se skládá ze tří vrstev, a to vnější epikutikuly, prostřední exokutikuly a vnitřní endokutikuly. Všichni příslušníci ekdysozoí svou kutikulu nejméně jednou za život svlékají.
The Ecdysozoa are protostomes, named after their shared trait of ecdysis, growth by moulting. They include the largest animal phylum, the Arthropoda, which contains insects, spiders, crabs, and their kin. All of these have a body divided into repeating segments, typically with paired appendages.
Ecdysozoa är en överstam inom de protostoma djuren. Den består av leddjur, rundmaskar och flera mindre stammar. De kännetecknas av en tre lager tjock kutikula och avsaknad av cilier för rörelse (hos bland annat spermier). Spermierna är istället amöboida.
