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 ?
The validity of many of these taxa is uncertain and ~10% of the described species of Onychophora, show major taxonomical problems and should be regarded as nomina dubia according to Mayer and Oliveira (2013).
Ramskold, "Homologies in Cambrian Onychophora," Lethaia 25 (1992): 443-60; L.
327-369 in Microscopic Anatomy of Invertebrates, Onychophora, Chilopoda and Lesser Protostomata, F.
Tabla 1 Caracteres morfologicos que comparten los tardigrados con Arthropoda, Nematoda y Onyehophora Tardigrados con Arthropoda y Onychophora Nematoda Locomocion por medio de piernas Cavidad del cuerpo Pseudoceloma Presencia de ojos Esqueleto hidrostatico Reproduccion: oviparos y Tubo digestivo completo monosexuales (Dioceus) Ausencia de sistema circulatorio Ecologia: terrestre y acuatica Reproduccion: monosexuales (Dioecius) Ecologia: terrestre o acuatico Tabla 2 Secuencias de mucleotidos y proteinas reportadas para tardigrados en NCBI.
Onychophora in invertebrate conservation: priorities, practice and prospects.
Body size: The body size has been regarded as of little taxonomic use due to the contraction capacity of Onychophora.
The African distribution of peripatopsid Onychophora is similarly confined to this region, and they are also absent from India-Madagascar and south-east Asia, but unlike rhytidids and sphaerotheriids, the peripatopsids also occur in South America.
Using the new, as-yet-unnamed Chinese fossil as a guidepost, two researchers now suggest that some of the most enigmatic of these animals belong to the phylum Onychophora, which in the modern world includes the velvet worms of the tropics.
Esta secrecion adhesiva implicada en la depredacion y defensa es una de las caracteristicas mas distintivas de los miembros del Filo Onychophora.
Abstract: The taxonomic location of the Onychophora has been controversial because of their phenotypic and genotypic characteristics, related to both annelids and arthropods.
Penetration of the oocyte by sperm during meiotic prophase has been described in the nematode Brachycoelium, the annelids Dinophilus and Histriobdella, and the onychophora Peripalopsis (Austin, 1965).