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Encyclopedia > Tidarren
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Suborder: Araneomorphae
Family: Theridiidae
Genus: Tidarren
Chamberlin & Ivie, 1934

Tidarren is a genus of spiders. The males are much smaller than females. Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Phyla Subregnum Parazoa Porifera (sponges) Subregnum Agnotozoa Placozoa (trichoplax) Orthonectida (orthonectids) Rhombozoa (dicyemids) Subregnum Eumetazoa Radiata (unranked) (radial symmetry) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anemones) Bilateria (unranked) (bilateral symmetry) Acoelomorpha (basal) Myxozoa (slime animals) Superphylum Deuterostomia (blastopore becomes anus) Chordata (vertebrates, etc. ... Subphyla and Classes Subphylum Trilobitomorpha Trilobita - trilobites (extinct) Subphylum Chelicerata Arachnida - spiders,scorpions, etc. ... Orders Acarina Amblypygi Araneae Opiliones Palpigradi Pseudoscorpionida Ricinulei Schizomida Scorpiones Solifugae Uropygi The arachnids, Arachnida, are a class of invertebrate animals in the subphylum Chelicerata. ... For other uses, see Spider (disambiguation). ... The Araneomorphae, previously called the Labidognatha, are a suborder of spiders. ... Genera Latrodectus Argyrodes Theridion Steatoda The tangle-web spiders or comb-footed spiders (family Theridiidae) are a large group (over 2000 species in nearly 80 genera) of haphazard web-builders found throughout the world. ... 1934 (MCMXXXIV) was a common year starting on Monday (link will take you to calendar). ...

The males of this genus amputate one of their palps before maturation and enter their adult life with one palp only, probably to increase mobility, because they are really large compared to their tiny size.

In the Yemeni species Tidarren argo, the remaining palp is then torn off by the female. Spider males use their palp to transfer semen into the femal. The separated palp remains attached to the female's epigynum for about four hours and apparently continues to function independently. In the meantime the female feeds on the palpless male.


Tidarren species occur in Africa, and in Middle and South America.


Tidarren Chamberlin & Ivie, 1934

  • Tidarren argo Knoflach & van Harten, 2001 (Yemen)
  • Tidarren chevalieri (Berland, 1936) (Canary Is., Cape Verde Is.)
  • Tidarren cuneolatum (Tullgren, 1910) (Central, East Africa, Yemen)
  • Tidarren haemorrhoidale (Bertkau, 1880) (USA to Argentina)
  • Tidarren levii Schmidt, 1957 (Congo)
  • Tidarren mixtum (O. P.-Cambridge, 1896) (Mexico to Costa Rica)
  • Tidarren sisyphoides (Walckenaer, 1842) (USA to Colombia, West Indies)




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