Arachnida


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Related to Arachnida: Malacostraca, Merostomata, Myriapoda

Arachnida

 [ah-rak´nĭ-dah]
a class of animals of the phylum Arthropoda, including 12 orders, comprising such forms as spiders, scorpions, ticks, and mites.

A·rach·ni·da

(ă-rak'ni-dă),
A class of arthropods in the subphylum Chelicerata, consisting of spiders, scorpions, harvestmen, mites, ticks, and allies.
[G. arachnē, spider]

A·rach·ni·da

(ă-rak'ni-dă)
A class of arthropods in the subphylum Chelicerata, consisting of spiders, scorpions, harvestmen, mites, and ticks.
[G. arachnē, spider]
References in periodicals archive ?
A medium-spatial scale distribution pattern of Pseudoscorpionida (Arachnida) in a gradient of topography (altitude and inclination), soil factors, and litter in a central Amazonia forest reserve, Brazil.
Based on biomass, Arachnida were the dominant prey group (B= 45.32%), followed by Insecta (B= 41.40%).
On the composition of Pseudoscorpiones (Arachnida) from Amazonian dryland and inundation forests in Brazil.
Insecta, 88.40% Gastropoda, 0.73% Arachnida, 5.59% Crustacea, 4.46% Myriapoda, 0.62% Podurata, 0.20% Index of species selection ingested by Anas platyrhynchos:
Textura Rugosa Lisa Largo 5,07 [+ o -] 1,23 5,55 [+ o -] 0,74 (promedio en mm [+ o -] DS) Ancho 2,19 [+ o -] 0,51 1,74 [+ o -] 0,19 (promedio en mm [+ o -] DS) Dieta Artropodos Artropodos (Blattodea, (Hymenoptera, Orthoptera, Coleoptera,) Hymenoptera, Coleoptera, Hemiptera y Arachnida) Semillas (Melastomataceae).
Asiatische Arten der Gattung Euphalangium Roewer (Arachnida: Opiliones: Phalangiidae).
The view that basal scorpions were not terrestrial and that terrestrialisation occurred in scorpions independently of other Arachnida (Selden & Jeram 1989) carried the implication that the Araneae are not monophyletic (Scholtz & Kamenz 2006).