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Priapulida (priapulid worms, from Gr. πριάπος, priāpos 'Priapus' + Lat. -ul-, diminutive),
sometimes referred to as **** worms, is a
phylum of unsegmented...
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secondarily lost in
certain groups. An
unpaired ventral nerve cord,
present in
Priapulida and Nematoida,
appear to be the
ancestral condition,
making the paired...
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proposed on
morphological grounds to
unite three phyla: the Kinorhyncha, the
Priapulida and the Loricifera. The
three phyla have four
characters in
common — chitinous...
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fossil findings hint that the last
common ancestor of both
arthropods and
Priapulida shared the same
specialized mouth apparatus: a
circular mouth with rings...
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digestive tract instead of
around it like in
other coelomate animals.
Priapulida appears to
belong to the
pseudocoelomate animals, but the possibility...
- pharynx") of a
possible new
species of Meiopriapulus, a
marine worm in the
Priapulida,
bears pharyngeal teeth.
Fossils of the
Yunnanozoon and
Haikouella possess...
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Cycloneuralia Scalidophora Phylum Kinorhyncha Phylum Loricifera Phylum Priapulida Nematoida Phylum Nematoda Phylum Nematomorpha Panarthropoda Phylum Onychophora...
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Cycloneuralia Priapulida,
Nematoda and
relatives Panarthropoda Onychophora,
Tardigrada and Arthropoda...
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important parasites.
Smaller phyla related to them are the Kinorhyncha,
Priapulida, and Loricifera.
These groups have a
reduced coelom,
called a pseudocoelom...
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Priapulida Kinorhyncha...
