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Neochildia fusca, a member of Convolutidae (= Anaperidae). Acoela, or the acoels, is an order of small and simple invertebrates in the subphylum Acoelomorpha of phylum Xenacoelomorpha, a deep branching bilaterian group of animals, which resemble flatworms.
The acoelomate theory, which states that coelom evolved from an acoelomate ancestor. The enterocoel theory, which states that coelom evolved from gastric pouches of cnidarian ancestors. This is supported by research on flatworms [ citation needed ] and small worms recently discovered [ clarification needed ] in marine fauna [ citation needed ...
[7] Unlike most other bilaterians, Platyhelminthes have no internal body cavity, so are described as acoelomates. Although the absence of a coelom also occurs in other bilaterians: gnathostomulids , gastrotrichs , xenacoelomorphs , cycliophorans , entoproctans and the parastic mesozoans .
Nematode eggs from the clades Ascaridina, Spirurina, and Trichocephalida have been discovered in coprolites from the Oligocene-aged Tremembé Formation, which represented a palaeolake in present-day São Paulo with a diverse fossil assemblage of birds, fish, and arthropods that lent itself to fostering high nematode diversity. [41]
Nematoida is a clade of pseudocoelomate free living or parasitic animals.It consists of phyla Nematoda and Nematomorpha. [3] [4] The two groups share a number of features in common; the presence of a cloaca in both sexes, aflagellate sperm, and a cuticle made of collagen.
Nematodes play an astoundingly wide range of ecological roles that scientists are only beginning to understand. Word from the Smokies: Scientist uncovers secret life of soil through study of nematodes
List of nematodes in Sabah; References This page was last edited on 25 October 2023, at 21:20 (UTC). Text is available under the Creative Commons ...
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