Laniatores - Biblioteka.sk

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Laniatores
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Laniatores
Temporal range: Cretaceous–present
Pellobunus insularis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Opiliones
Suborder: Laniatores
Thorell, 1876
Superfamilies

Travunioidea
Triaenonychoidea
Assamioidea
Epedanoidea
Phalangodoidea
Samooidea
Sandokanoidea
Zalmoxoidea
Gonyleptoidea

Laniatores is the largest suborder of the arachnid order Opiliones with over 4,200 described species worldwide. The majority of the species are highly dependent on humid environments and usually correlated with tropical and temperate forest habitats.

Laniatores are typically (relatively) short-legged, hard-plated, spiny Opiliones, common under logs and stones, in leaf litter and in caves. They often have spiny pedipalps and paired or branched claws on the third and fourth pairs of legs.[1] The largest family is Gonyleptidae Sundevall, 1833, endemic of the Neotropics, with over 800 valid species and showing many cases of maternal and paternal care.

Identification

The dorsal scutum consists of a single piece, with the carapace or peltidium entirely fused with abdominal scutum. The pedipalpus is usually robust and armed with strong spines. The ovipositor is short and unsegmented (derived character state shared with the Dyspnoi). The penis is complex, with many sclerites. Some of the sclerites are movable, with a single penial muscle present. For the most part, the penis is without muscles, instead working by hemolymph pressure.

Subtaxa

Definitions and limits of superfamilies are still in a state of flux. The largest by far is the Gonyleptoidea, with over 2,000 described species.

Geographic distribution

Distribution of subunits of Laniatores is very interesting from the biogeographic point of view. The Travunioidea are typical of northern temperate regions while the Triaenonychoidea make their counterpart in the southern temperate regions. The other superfamilies are tropical, with many noteworthy endemisms and transcontinental relationships.


Footnotes

  1. ^ Pinto-da-Rocha et al. 2007: 17

References

  • Pinto-da-Rocha, R., Machado, G. & Giribet, G. (eds.) (2007): Harvestmen - The Biology of Opiliones. Harvard University Press ISBN 0-674-02343-9
Zdroj:https://en.wikipedia.org?pojem=Laniatores
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