Irura bidenticulata

Irura bidenticulata, commonly known as the purple-gold jumping spider, is a species of salticid. As the name implies, while females tend to take on a more dull coloration, males are characterized by their striking, shiny magenta-gold patterned bodies. Discovered in 2011, the spider had initially been mistaken for a member of the Simaetha genus. Native to regions of Southeast Asia, it was first spotted in Hainan, China, having since also been located in the Saraburi province of Thailand, Cambodia, Hong Kong, and Assam.[1][2][3][4]

Irura bidenticulata
Male
Female
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Salticidae
Subfamily: Salticinae
Genus: Irura
Species:
I. bidenticulata
Binomial name
Irura bidenticulata
(Guo, Zhang & Zu, 2011)

Description

The purple-gold jumping spider typically measures 5–6 mm (0.20–0.24 in).[5] It is sexually dimorphic; most females of the species are of an almost solid gold pigmentation (though some may exhibit a muted brown pattern resembling that of a male), while males are known for their dazzling purple-pink and gold patterned reflective trichobothria. The unique purple pattern on males' abdomens best described as "a snow angel wearing a tophat" surrounded by gold coloration tends to remain the same. However, the purple-gold pattern on the top of their heads often varies slightly between individuals, as do their pedipalps. The cheliceras are occasionally black-tipped, in addition to the base of the extremities.

  • Dorsal view of male specimen
    Dorsal view of male specimen
  • High-definition male closeup
    High-definition male closeup
  • Female frontal macro
    Female frontal macro
  • Female next to human thumb for scale
    Female next to human thumb for scale

References
  1. "Irura bidenticulata". iNaturalist. Retrieved 2022-09-20.
  2. "First records of the jumping spider genus Irura" (PDF). Peckhamia. 14 August 2021.
  3. Kropf C., Nentwig W., Blick T. & Gloor D. (organizing board). (2019). WSC: World Spider Catalog (version 19.5, Jan 2019). In: Species 2000 & ITIS Catalogue of Life, 2019 Annual Checklist (Roskov Y., Ower G., Orrell T., Nicolson D., Bailly N., Kirk P.M., Bourgoin T., DeWalt R.E., Decock W., Nieukerken E. van, Zarucchi J., Penev L., eds.). Digital resource at www.catalogueoflife.org/annual-checklist/2019. Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X.
  4. Dmitri, Logunov. "On four species of Irura Peckham & Peckham, 1901 (Araneae: Salticidae) collected by John and Frances Murphy from south-east Asia". Research Gate.
  5. Guo, J. Y., Zhang, F., Zhu, M. S. (2011) Two new species of the genus Irura Peckham & Peckham, 1901 (Araneae: Salticidae) from Hainan Island, China, Acta Arachnologica 60: 89-91


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