Dionycha
Marpissa muscosa
Scientific classification
Kingdom: Animalia Phylum: Arthropoda Class: Arachnida Order: Araneae Suborder: Araneomorphae Infraorder: Entelegynae Section: Dionycha
Diversity
17 families
Families
See text. Marpissa muscosa is a Jumping spider. Females reach about 8-11mm length males only 6-8mm Arthropods are Animals belonging to the Phylum Arthropoda (from Greek ἄρθρον arthron, " Joint " Arachnids are a class ( Arachnida) of joint-legged Invertebrate Animals in the subphylum Chelicerata. Spiders are Predatory Invertebrate Animals that have two body segments, eight legs no chewing mouth parts and no wings The Araneomorphae are a Suborder of Spiders They are distinguished by having Chelicerae (fangs that point diagonally forward and cross in a pinching action The Entelegynae are a subgroup of araneomorph spiders Almost all members of this group unlike most members of Haplogynae, have eight eyes and females have Spider taxonomy is the Alpha taxonomy of the Spiders members of the Araneae order of the arthropod

The Dionycha are a phylogenetic group of spiders (Araneomorphae:Entelegynae) with about 10,000 species. The Araneomorphae are a Suborder of Spiders They are distinguished by having Chelicerae (fangs that point diagonally forward and cross in a pinching action The Entelegynae are a subgroup of araneomorph spiders Almost all members of this group unlike most members of Haplogynae, have eight eyes and females have 17 families belong to this group, amongst others: Salticidae (jumping spiders), Gnaphosoidea, Thomisidae (crab spiders), and the Clubionidae. The jumping spider family ( Salticidae) contains more than 500 described genera and over 5000 Species, making it the largest family of Spiders with about The Gnaphosoidea are a Superfamily of araneomorph, mostly eight-eyed spiders with seven families Ammoxenidae Cithaeronidae Crab spiders make up the Thomisidae family of the Araneae order The sac spiders of the family Clubionidae have a very confusing taxonomic history Spiders in this group have better senses (sight, hearing) than others, some even show courtship dances and songs.

The Dionycha probably evolved from the web-building Trionycha. Unlike these, the Dionycha have only two instead of three tarsal claws. The central third claw of the Trionycha is responsible for tracking the silk thread. Spider silk, also known as Gossamer, is a Protein Fiber spun by Spiders Spiders use their silk to make webs or other structures which function Instead of this claw, Dionycha have dense tufts of scupula hairs that produce strong adhesion, enabling some species to climb glass. Most species hunt their prey instead of building webs, although some species of Trionycha (members of Lycosoidea) also hunt. The Lycosoidea are a Superfamily of araneomorph eight-eyed spiders with twelve families Ctenidae Lycosidae

There are no cribellate members in the Dionycha^[1]. A cribellum is a kind of comb-like device in certain Spiders used to separate fibers of Silk drawn from its Spinnerets into many extremely fine fibers giving

The monophyly of the Dionycha has been disputed. A clade is a taxonomic group comprising a single Common ancestor and all the descendants of that ancestor Today it is thought that the reduction of the third claw evolved several times independently.

Contents 1 Cladogram (after Coddington & Levi, 1991, simplified) 2 Footnotes 3 References 4 External links

Cladogram (after Coddington & Levi, 1991, simplified)

|-Araneomorphae
|--|
   |-Haplogynae              |__/-- Corinnidae          
   |-Entelegynae          |--|  \-- Liocranidae
      |-Trionycha         |  |----- Gnaphosoidea (7 families, c. The Araneomorphae are a Suborder of Spiders They are distinguished by having Chelicerae (fangs that point diagonally forward and cross in a pinching action The corinnid sac spiders (family Corinnidae) like the other clubionoid families have a very confusing taxonomic history Liocranid sac spiders consist of about 160 species of wandering spiders in 30 or so genera. The Gnaphosoidea are a Superfamily of araneomorph, mostly eight-eyed spiders with seven families Ammoxenidae Cithaeronidae  3,000 species)
      |-Dionycha-------|--|     |-- Clubionidae
                       |  |-----|--  Anyphaenidae
                       |        |-- Salticidae, > 5,000 species
                       |----------- Thomisidae, > 2,000 species
                       |----------- Philodromidae
                       |----------- Sparassidae
                       |----------- Selenopidae
                       |----------- Zoridae

Footnotes

References

• J. Bosselaers and R. Jocqué. 2002. Studies in Corinnidae: cladistic analysis of 38 corinnid and liocranid genera, and transfer of Phrurolithinae. Zoologica Scripta 31:241-270.
• J. A. Coddington and H. W. Levi. 1991. Systematics and evolution of spiders (Araneae). Annual Review of Ecology and Systematics 22:565-592.
• Griswold, C. E. , Coddington, J. A. , Platnick, N. I. and Forster, R. R. (1999). Towards a Phylogeny of Entelegyne Spiders (Araneae, Araneomorphae, Entelegynae). Journal of Arachnology 27:53-63. PDF

External links

• Tree of Life

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