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Velvet worms (Onychophora) | |
 | Catalogue / Nature / Vie / Animaux / Velvet worms (Onychophora) |
| Catalogue / Culture / Sciences / Biologie / Biologie des organismes / Zoologie / Zoologie des invertébrés / Velvet worms (Onychophora) |
| Catalogue / Culture / Sciences / Biologie / Biologie des organismes / Zoologie / Taxonomie: Animaux (Animalia) / Animals Types / Velvet worms (Onychophora) |
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Onychophora
Phylogenetic relationships - part of site about cladistic trees. [eng] |
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Phylum Arthropoda
Phylum Onychophora: velvet worms: short reference. [eng] |
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Ecology: The velvet underground
Popular paper about velvet worms from "Nature". [eng] |
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eGroups : onychophora Subscribe
Discussion list for any aspect of onychophorans - their biology, phylogenetics, conservation, etc. [eng] |
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Onychophora
Short descriptions of morphological characters, picture. [eng] |
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Onychophora & Arthropoda Clade
Phylogenetic relationships and characters of taxa. [eng] |
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Introduction to the Onychophora
The average resident of the Northern Hemisphere is probably not familiar with the Onychophora; they are restricted to forest regions of South America, Africa, the Caribbean, and Oceania. Shy creatures, able to hide in incredibly tight crevices, these "velvet worms" (about ninety living species known) are rarely seen even in their natural habitat. Yet onychophorans are of great interest to biologists, because they seem to be related to arthropods, and give us an idea of what the ancestors of the arthropods may have been like. Although they are rare as fossils, a number that have been found from the Cambrian period. These fossils show that abundant marine relatives of the Onychophora flourished in the seas 520 million years ago. [eng] |
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TROPIWEB, Onychophora Abstracts, Organization for Tropical Studies (OTS), Costa Rica
Collection of abstracts about Onychophora. [eng] |
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