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Crab spiders
Ozyptila praticola
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Superfamily: Thomisoidea
Family: Thomisidae
Sundevall, 1833
Genera

Amyciaea
Aphantochilus
Coriarachne
Diaea
Heriaeus
Misumena
Misumenoides
Misumenops
Ozyptila
Pistius
Rejanellus
Runcinia
Synema
Thomisus
Tmarus
Xysticus
many others

Diversity
170 genera, > 2,000 species

Crab spiders or Thomisidae family of the Araneae order. They are called crab spiders because they resemble crabs, with two front pairs of legs angled outward and bodies that are flattened and often angular. Also, like crabs, Thomisidae can move sideways or backward.

Crab spiders do not build webs to trap prey, but are hunters and ambushers. Some species sit on or among flowers, bark, fruit or leaves where they grab visiting insects. Individuals of some species, such as Misumena vatia, are able to change color between white and yellow to match the flower on which they're sitting. Other species, with their flattened bodies, hunt in the crevices of tree trunks or under loose bark. Members of the genus Xysticus hunt in the leaf litter on the ground. In each case, crab spiders use their powerful front legs to grab and hold onto prey while paralyzing it with a venomous bite.

The spider family Aphantochilidae was incorporated into the Thomisidae in the late 1980s. Aphantochilus species mimic Cephalotes ants, on which they prey.

The spiders of Thomisidae are not known to be harmful to humans. However, spiders of an unrelated genus, Sicarius, which are sometimes referred to as "crab spiders", are close cousins to the recluse spiders, and are highly venomous.

The unrelated species Gasteracantha cancriformis is commonly called the "crab spider."

Contents

Systematics

The following subfamilies are recognized:

  • Aphantochilinae (3 genera)
  • Bominae Ono, 1984 (9 genera)
  • Dietinae (32 genera)
  • Stephanopinae (35 genera)
  • Stiphropodinae (3 genera)
  • Strophiinae (8 genera)
  • Thomisinae (67 genera)
  • incertae sedis
  • Ansiea Lehtinen, 2005
  • Carcinarachne Schmidt, 1956
  • Cozyptila Lehtinen & Marusik, 2005
  • Ebelingia Lehtinen, 2005
  • Facundia Petrunkevitch, 1942 † (fossil)
  • Fiducia Petrunkevitch, 1942 † (fossil)
  • Henriksenia Lehtinen, 2005
  • Hexommulocymus Caporiacco, 1955
  • Ledouxia Lehtinen, 2005
  • Mastira Thorell, 1891
  • Megapyge Caporiacco, 1947
  • Modysticus Gertsch, 1953
  • Rejanellus Lise, 2005
  • Syphax Koch & Berendt, 1854 † (fossil)
  • Tarrocanus Simon, 1895
  • Taypaliito Barrion & Litsinger, 1995

There are 9 genera, containing 130 species of crab spiders in North America.

Gallery

See also

References

  • Biolib family Thomisidae
  • Lise, A.A. (2005). Rejanellus, a new genus of Thomisidae (Araneae, Stephanopinae). Iheringia, Sér. Zool. 95(2):151-164. PDF

External links

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Wikispecies

Up to date as of January 23, 2010

From Wikispecies

Taxonavigation

Main Page
Cladus: Eukaryota
Supergroup: Unikonta
Cladus: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Phylum: Arthropoda
Subphylum: Chelicerata
Classis: Arachnida
Ordo: Araneae
Subordo: Opisthothelae
Infraordo: Araneomorphae
Taxon: Neocribellatae
Series: Entelegynae
Sectio: Dionycha
Superfamilia: Thomisoidea
Familia: Thomisidae
Subfamiliae: Aphantochilinae - Bominae - Dietinae - Stephanopinae - Stiphropodinae - Strophiinae - Thomisinae - Incertae sedis

List of genera

Directory A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

Acentroscelus - Acracanthostoma - Alcimochthes - Amyciaea - Angaeus - Ansiea - Aphantochilus - Apyretina - Ascurisoma - Avelis

B

Bassaniana - Bassaniodes - Boliscodes - Boliscus - Bomis - Bonapruncinia - Borboropactus - Bucranium

C

Camaricus - Carcinarachne - Cebrenninus - Ceraarachne - Cetratus - Coenypha - Coriarachne - Corynethrix - Cozyptila - Cupa - Cymbacha - Cymbachina - Cynathea - Cyriogonus

D

Deltoclita - Demogenes - Diaea - Dietopsa - Dimizonops - Diplotychus - Domatha

E

Ebelingia - Ebrechtella - Emplesiogonus - Epicadinus - Epicadus - Epidius - Erissoides - Erissus

F

Felsina - Firmicus

G

Geraesta - Gnoerichia

H

Haedanula - Haplotmarus - Hedana - Henriksenia - Herbessus - Heriaesynaema - Heriaeus - Heterogriffus - Hewittia - Hexommulocymus - Holopelus

I

Iphoctesis - Isala - Isaloides

L

Lampertia - Latifrons - Ledouxia - Loxobates - Loxoporetes - Lycopus - Lysiteles

M

Majellula - Martus - Massuria - Mastira - Mecaphesa - Megapyge - Metadiaea - Misumena - Misumenoides - Misumenops - Misumessus - Modysticus - Monaeses - Musaeus - Mystaria

N

Narcaeus - Nyctimus

O

Ocyllus - Onocolus - Ostanes - Oxytate - Ozyptila

P

Pactactes - Pagida - Parabomis - Paramystaria - Parasmodix - Parastephanops - Parastrophius - Parasynema - Pasias - Pasiasula - Peritraeus - Phaenopoma - Pharta - Pherecydes - Philodamia - Philogaeus - Phireza - Phrynarachne - Physoplatys - Pistius - Plancinus - Plastonomus - Platyarachne - Platythomisus - Poecilothomisus - Porropis - Pothaeus - Prepotelus - Pseudamyciaea - Pseudoporrhopis - Pycnaxis - Pyresthesis

R

Reinickella - Rejanellus - Rhaebobates - Runcinia - Runcinioides

S

Saccodomus - Sanmenia - Scopticus - Sidymella - Simorcus - Sinothomisus - Smodicinodes - Smodicinus - Soelteria - Stephanopis - Stephanopoides - Stiphropella - Stiphropus - Strigoplus - Strophius - Sylligma - Synaemops - Synalus - Synema - Synstrophius

T

Tagulinus - Tagulis - Takachihoa - Talaus - Tarrocanus - Taypaliito - Tharpyna - Tharrhalea - Thomisops - Thomisus - Titidiops - Titidius - Tmarus - Tobias - Trichopagis

U

Ulocymus - Uraarachne

W

Wechselia

X

Xysticus

Z

Zametopias - Zametopina - Zygometis

Name

Thomisidae Sundevall, 1833

Synonyms

References

  • Ono, H. 1988. A revisional study of the spider family Thomisidae (Arachnida, Araneae) of Japan. National Science Museum, Tokyo, ii + 252 pp. PDF
  • Benjamin, S. P., D. Dimitrov, R. G. Gillespie, G. Hormiga. 2008. Family ties: molecular phylogeny of crab spiders (Araneae: Thomisidae). Cladistics 24: 1-15. Abstract
  • Platnick, N. I. 2008. The World Spider Catalog, version 9.0. American Museum of Natural History. [1]
  • Joel Hallan's Biology Catalog

Vernacular names

Česky: Běžníkovití
Deutsch: Krabbenspinnen
English: Crab spider
한국어: 게거미과
日本語: カニグモ科
Türkçe: Yengeç örümceğigiller
Wikimedia Commons For more multimedia, look at Thomisidae on Wikimedia Commons.

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