Biology:Box kite spider

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Short description: Genus of spiders

Box kite spiders
I. tabulata
I. cicatricosa
Scientific classification e
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Araneidae
Genus: Isoxya
Simon, 1885
Type species
I. cicatricosa
(C. L. Koch, 1844)
Species

17, see text

Box kite spiders (Isoxya) is a genus of Afrotropical orb-weaver spiders first described by Eugène Simon in 1885. Like the spiny orb-weavers they have six prominent (but short) spines on their abdomen. They are small spiders, measuring 3 to 7 millimetres (0.12 to 0.28 in) across.[1] Isoxya have a sclerotised (or porcelain-like) abdomen which is typical of the Gasteracanthinae.[1]

Description

These spiders have a carapace that is usually as wide as it is long. Their abdomen is brightly decorated with yellow, red or black and white patterns. The dorsal part is hardened to form a rigid scutum bearing large spots and depressions, often prolonged laterally and posteriorly in spine-like extensions.[2]

The spinnerets are surrounded by a sclerotised ring. Legs are relatively short. The eight eyes are in two rows (4:4). Males are much smaller than females and differ in color and shape.[2]

Lifestyle

During the day box kite spiders can be found in large orb-webs usually made high between trees. The web is usually decorated with small silk tufts. The egg sacs are covered with silk and they attach it to vegetation.[2]

Species

As of September 2025, this genus includes seventeen species:[3]

  • Isoxya basilewskyi Benoit & Emerit, 1975Rwanda, DR Congo
  • Isoxya cicatricosa (C. L. Koch, 1844) – Central, East, Southern Africa, Yemen (type species)
  • Isoxya cowani (Butler, 1883)Madagascar
  • Isoxya kochi (O. Pickard-Cambridge, 1877) – West, Central, East Africa
  • Isoxya mahafalensis Emerit, 1974 – Madagascar
  • Isoxya manangona Agnarsson, Starrett, Babbitz, Bond, Gregorič, Raberahona, Williams & Kuntner, 2023 – Madagascar
  • Isoxya milloti Emerit, 1974 – Madagascar
  • Isoxya mossamedensis Benoit, 1962 – Angola, South Africa
  • Isoxya mucronata (Walckenaer, 1841) – Sudan, DR Congo, South Africa
  • Isoxya nigromutica (Caporiacco, 1939) – East Africa
  • Isoxya reuteri (Lenz, 1886) – Madagascar
  • Isoxya semiflava Simon, 1887 – West, Central Africa
  • Isoxya somalica (Caporiacco, 1940) – Somalia
  • Isoxya stuhlmanni (Bösenberg & Lenz, 1895) – DR Congo, Rwanda, Tanzania, Mozambique, South Africa, Eswatini
  • Isoxya tabulata (Thorell, 1859) – DR Congo, Malawi, Tanzania, Angola, Zimbabwe, Mozambique, South Africa, Eswatini
  • Isoxya testudinaria (Simon, 1901) – West, Central, East Africa
  • Isoxya yatesi Emerit, 1973 – South Africa

References

  1. 1.0 1.1 Larsen, Norman. "Isoxya (box kite spiders)". biodiversity explorer. iziko museums. Archived from the original on 29 March 2013. https://web.archive.org/web/20130329164835/http://www.biodiversityexplorer.org/arachnids/spiders/araneidae/isoxya.htm. Retrieved 2013-06-17. 
  2. 2.0 2.1 2.2 Dippenaar-Schoeman, A.S.; Haddad, C.R.; Foord, S.H.; Lotz, L.N.; Webb, P. (2022). The Araneidae of South Africa. Version 2: part 2 (E-Ne). South African National Survey of Arachnida Photo Identification Guide. pp. 34. doi:10.5281/zenodo.6619195.  This article incorporates text available under the CC BY 4.0 license.
  3. "Genus Isoxya". World Spider Catalog. doi:10.24436/2. https://wsc.nmbe.ch/genus/335. Retrieved 26 September 2025. 

Wikidata ☰ Q3015872 entry