Opiliones


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Opiliones

 

(also Phalangida), an order of arthropods of the class Arachnida. The body length is 1–22 mm. The animals resemble spiders, but unlike the latter, they have a segmented abdomen joined to the prosoma by a broad base. The first pair of oral extremities are chelate chelicerae that lack poison glands; the pedipalps are short. The walking legs are very long and slender and may be easily torn off. Breathing is by means of tracheae. Of the more than 2,400 species, 72 are found in the USSR. The arthropods live on the forest floor, under the bark of trees; they are often found on fences and various other structures. The animals are nocturnal predators.

References in periodicals archive ?
We also recorded several types of prey not previously recorded for torrent salamanders, including Platyhelminthes worms (possibly including intestinal Cestoda or Trematoda parasites, but also Planariid prey), Acari, Opiliones, Pseudoscorpionida, Chilopoda, Hemiptera, and Isopoda.
Aunque los eventos fueron fortuitos, estas observaciones en campo constituyen un interesante registro de los habitos alimenticios de tetigoni dos y esclerosomatidos, siendo el primer reporte de consumo de huevos de anuros (en especial centrolenidos) por parte de individuos de esta familia de opiliones y el segundo de tetigonidos.
Geographic and seasonal variations of the number of B chromosomes and external morphology in Psathyropus tenuipes (Arachnida: Opiliones).
The Order Opiliones Sundevall, comprises four suborders (Cyphophthalmi Simon, Eupnoi Hansen & Sorensen, Dyspnoi Hansen & Sorensen, and Laniatores Thorell) with more than 6.000 taxonomically described species (Shultz & Regier, 2001; Giribet etal., 2002; Hallan, 2009).
Specifically, their knowledge of spider morphology and anatomy was superficial: the characteristics they knew best were that they have 8 legs and silk; very few participants were able to describe them or draw them correctly and they confused them with insects and opiliones or mites.
myrmica, M, aphenogaster, Camponotus pennsylvanicus, Formica phenolepis), slugs, and harvestmen (Opiliones) (F.
Members of the families Tetragnathidae, Amaurabiidae, Salticidae and Pisauridae and of the order Opiliones were observed almost exclusively in areas of the cave with low gas concentrations and on substrates with a measured pH of nearly neutral and thus inhabited a more limited spatial range within the cave.
La clase que presento el mayor numero de ordenes fue Insecta (Blattodea, Coleoptera, Hemiptera, Hymenoptera, Diplura y Lepidoptera), seguida de Arachnida (Acari, Schizomida, Araneae, Opiliones y Pseudoscorpiones), Diplopoda (Polyzoniida, Stemmiulida, Spirostreptida y Polydesmida), Gastropoda (Archaeogastropoda, Stylommatophora, Basommatophora y Systellommatophora); Chilopoda (Lithobiomorpha, Scolopendromorpha y Geophilomorpha) y un orden en cada una de las clases Clitellata (Haplotaxida), Entognatha (Diplura), Malacostraca (Isopoda) y Symphyla (no identificado).
Los aracnidos se encuentran distribuidos en los ordenes Aranae y Opiliones con 7.69% cada uno (Tabla 3 c).