Trichagalma formosana

Trichagalma formosana is a gall wasp species in the family Cynipidae whose life cycle involves only Palaearctic oaks, Quercus subgen. Quercus, in the section Cerris.[1] It is endemic to Taiwan.[1][2]

Trichagalma formosana
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Hymenoptera
Family:
Cynipidae
Genus:
Trichagalma
Species:
T. formosana
Binomial name
Trichagalma formosana
Melika and Tang, 2010

Description and biology

Trichagalma formosana is only known from galls on Quercus variabilis and Q. acutissima. New galls appear in August. Adults emerged in December in the lab, but in the wild they might overwinter in the gall and emerge next spring. The galls reach a diameter of 15 mm (0.59 in). Only asexual females are known, measuring about 5 mm (0.20 in) in body length.[1]

  • Trichagalma formosana open gall
    Trichagalma formosana open gall
  • Trichagalma formosana galls
    Trichagalma formosana galls

References
  1. Melika G, Pujade-Villar J, Abe Y, Tang CT, Nicholls J, Wachi N, Ide T, Yang MM, Penzes Z, Gyorgy C, Stone GN (2010). "Palaearctic oak gallwasps galling oaks (Quercus) in the section Cerris: re-appraisal of generic limits, with descriptions of new genera and species (Hymenoptera: Cynipidae: Cynipini)" (PDF). Zootaxa. 2470: 1–79. doi:10.11646/zootaxa.2470.1.1.
  2. K. T. Shao (ed.). "Trichagalma formosana Melika & Tang, 2010". Catalogue of life in Taiwan. Biodiversity Research Center, Academia Sinica, Taiwan. Retrieved 2 November 2016.

Further reading
  • Melika, George, et al. "Four New Species of Dryocosmus gallwasps from Taiwan (Hymenoptera: Cynipidae: Cynipini)." ISRN Zoology 2011 (2011).
  • Ide, Tatsuya, and Yoshihisa Abe. "A New Species of Dryocosmus Giraud (Hymenoptera: Cynipidae: Cynipini) in Japan and Korea-First Record of Eastern Palearctic Dryocosmus Species Showing Alternation of Generations on Section Cerris Oaks." Proceedings of the Entomological Society of Washington 117.4 (2015): 467–180.


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