Onychophora - Wikipedia
Velvet worms are segmented animals with a flattened cylindrical body cross-section and rows of unstructured body appendages known as oncopods or lobopods (informally: stub feet). They reach lengths between 0.1 and 22 cm (0.04–8.66 in) depending on species, with the smallest known being Ooperipatellus nanus and the largest known is ...
Hallucigenia - Wikipedia
Hallucigenia has long been interpreted as a stem-group onychophoran (velvet worms) – a position that has found support from multiple phylogenetic analysis. [10][7][18][19] A key character demonstrating this affinity is the cone-in-cone construction of Hallucigenia claws, a feature shared only with modern onychophorans. [10]
Misunderstood worm-like fossil finds its place in the Tree of Life
2014年8月17日 · The animals were between five and 35 millimetres in length, and lived on the floor of the Cambrian oceans. A new study of the creature’s claws revealed an organisation very close to those of modern velvet worms, where layers of cuticle (a hard substance similar to fingernails) are stacked one inside the other, like Russian nesting dolls.
ADW: Onychophora: INFORMATION
Phylum Onychophora, or velvet worms, contains approximately 180 species of bilaterally symmetrical, coelomate organisms that somewhat resemble caterpillars. Onychophorans range from 5 mm to 15 cm in length, with homonomous bodies and small heads.
Evolution: Velvet Worm Biogeography - ScienceDirect
2016年10月10日 · The first components of the velvet worm body plan can be recognized in exceptionally preserved Cambrian fossils, identifying an eclectic group of these 500 million year old organisms as early (stem-group) onychophorans 3, 4, 5.
Bibliometrics of velvet worm (Onychophora) research: geographic …
2022年11月16日 · Onychophorans are worms of Cambrian origin that have unclear relationships with annelids, tardigrades and arthropods; they have their own phylum and are remarkable for capturing their prey with an adhesive net that forms in a fraction of a second, and for having species in which the young are fed through a placenta.
Evolution: Velvet Worm Biogeography: Current Biology - Cell Press
The first components of the velvet worm body plan can be recognized in exceptionally preserved Cambrian fossils, identifying an eclectic group of these 500 million year old organisms as early (stem-group) onychophorans
Organ systems of a Cambrian euarthropod larva | Nature
2024年7月31日 · Youti yuanshi is a euarthropod species newly described from a fossilized larva from Yunnan Province, China dating approximately to late Atdabanian stage, Cambrian period, and provides insights ...
Cambrian lobopodians and extant onychophorans provide new ... - Nature
2012年12月11日 · This diversity might have its origins in the early Cambrian or even Pre-Cambrian periods 1,2,3, when the three major groups of Panarthropoda diverged: Onychophora (velvet worms), Tardigrada...
The Long-Lived Legacy of the Cambrian’s “Wonderful Life”
2012年8月17日 · Velvet worms that crawl through the undergrowth of tropical forests – carried by their short, conical legs – are descendants of one Cambrian group. But there was another lineage of...
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