Theridiosomatidae

Male Theridiosoma gemmosum, from Pavouci.


Belongs within: Araneoidea.

The Theridiosomatidae are minute spiders found in shaded and humid areas. They construct orb-webs that they pull into a dome shape by a taut thread extending from its centre (Jocqué & Dippenaar-Schoemann 2007).

Characters (from Jocqué & Dippenaar-Schoeman 2007): Very small; eight eyes present; legs with three tarsal claws; long trichobothria on dorsal side of tibiae III and IV, usually 2–4 times as long as diameter of tibia; pit organs present on prolateral margin of sternum; ecribellate; entelegyne; spermathecae connate.

Theridiosomatidae
    |  i. s.: Wendilgarda L88
    |           |--W. atricolor L88
    |           |--W. clara L88
    |           `--W. mexicana L88
    |         Chtonos JD-S07
    |         Baalzebub baubo JD-S07
    |--Epeirotypus E90 [Epeirotypinae JD-S07]
    |--Ogulniinae JD-S07
    |--Plato AM07 [Platoninae JD-S07]
    `--Theridiosoma Pickard-Cambridge 1879 [Theridiosomatinae] JD-S07
         |--T. brauni Wunderlich 1976 W76
         |--T. circuloargenteum Wunderlich 1976 W76
         |--T. epeiroides Bösenberg & Strand 1906 MG03
         |--T. gemmosum (Koch 1872) W76
         `--T. semiargentea Simon 1895 W76

*Type species of generic name indicated

REFERENCES

[AM07] Acosta, L. E., & G. Machado. 2007. Diet and foraging. In: Pinto-da-Rocha, R., G. Machado & G. Giribet (eds) Harvestmen: The Biology of Opiliones pp. 309–338. Harvard University Press: Cambridge (Massachusetts).

[E90] Eberhard, W. G. 1990. Early stages of orb construction by Philoponella vicinia, Leucauge mariana, and Nephila clavipes (Araneae, Uloboridae and Tetragnathidae), and their phylogenetic implications. Journal of Arachnology 18: 205–234.

[JD-S07] Jocqué, R., & A. S. Dippenaar-Schoeman. 2007. Spider Families of the World. Royal Museum for Central Africa: Tervuren (Belgium).

[L88] Liebherr, J. K. 1988. General patterns in West Indian insects, and graphical biogeographic analysis of some circum-Caribbean Platynus beetles (Carabidae). Systematic Zoology 37 (4): 385–409.

[MG03] Marusik, Yu. M., & E. F. Guseinov. 2003. Spiders (Arachnida: Aranei) of Azerbaijan. 1. New family and genus records. Arthropoda Selecta 12 (1): 29–46.

[W76] Wunderlich, J. 1976. Spinnen aus Australien. 1. Uloboridae, Theridiosomatidae und Symphytognathidae (Arachnida: Araneida). Senckenbergiana Biologica 57 (1–3): 113–124.

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