Onychophora

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Onychophora

a small subphylum of primitive arthropods containing the single genus Peripatus. They are worm-like, each segment having clawed limbs, and are probably descended from ancestors of the arthropods which diverged at an early and intermediate stage between annelids and arthropods.
References in periodicals archive ?
Immunolocalization of arthropsin in the onychophoran Euperipatoides rowelli (Peripatopsidae).
Low character variation among Onychophoran species has been an obstacle for taxonomic and phylogenetic studies (Oliveira et al.
Unfortunately, we cannot verify whether the onychophoran actively preyed (hunted and killed) upon the spider or whether the spider was found already dead.
Onychophorans share these same features, leading Ramskold and Hou to group the new fossil with the existing phylum.
A recent study in onychophorans found arthropsin expression in the neural tissues of the central nervous system (CNS) but not in the eyes, suggesting that arthropsins may be involved in extraocular photoreception (Eriksson et al.
is dedicated to Costa Rican herpetologist Alejandro Solorzano, who discovered the species, in consideration of his extensive work on the Central American herpetofauna and for his frequent contribution of onychophoran specimens to the University of Costa Rica.
CUADRO 1 Generos y especies de onicoforos (Peripatidae) reportados para Colombia, segun Peck (1975) TABLE 1 Genus and species of onychophorans (Peripatidae) reports for Colombia, according to Peck (1975) Familia Peripatidae Genero Especies Oroperipatus O.
Sperm ultrastructure of an ivoparous and ovoviviparous onychophoran species (Peripatopsidae) with some phylogenetic considerations.
Distal-less is a highly conserved gene that functions in the development of diverse kinds of appendages from onychophoran lobopods to mammalian limbs, and this gene is thought to have evolved in the pre-Cambrian ancestor of protostomes and deuterostomes (3).
Onychophoran worms are rare and most biologists have never seen them alive, but they are important because they have been considered "missing links" between annelids and arthropods as well as "living fossils" because their shape has not changed for 500 million years (Monge-Najera 1995, Hou and Bergstrom 1997).
Shale with a similar but modern tropical marine site where onychophorans are absent, and with a modern neotropical terrestrial onychophoran community.