Two new species and one new record of Willowsia Shoebotham, 1917 (Collembola: Entomobryidae) from the Eastern Himalayan region of India

Keywords: Willowsia, key, colour pattern, sexual dimorphism


Two species new to science Willowsia sikkimensis sp. nov. and W. arunachalensis sp. nov., and one new record of the genus Willowsia Shoebotham, 1917 are described and illustrated here. The new species are mainly distinguished from the others on the basis of pigment pattern, scale type and chaetotaxy. The species were collected from the states of Arunachal Pradesh and Sikkim (India). Willowsia shiae Pan, Zhang & Chen, 2006 is recorded for the first time from India (Arunachal Pradesh) and redescribed with detailed chaetotaxic nomenclature. A key to the Indian species of Willowsia and a comparison table of related species are also provided.


Baquero E., Mandal G. & Jordana R. 2015. Entomobryoidea (Collembola) from Himachal Pradesh (India) in the Himalayas. Zootaxa 4027 (1): 1–41.

Bellinger P.F., Christiansen K.A. & Janssens F. 1996–2024. Checklist of the Collembola of the world. Available from [accessed 3 May 2024].

Börner C. 1913. Die Familien der Collembolen. Zoologischer Anzeiger 41: 315–322.

Chai R. & Ma Y.T. 2017. Two new species of Willowsia (Collembola: Entomobryidae) from Yunnan Province, China. European Journal of Taxonomy 31: 1–12.

Chang Y. & Ma Y. 2018. Three new species of Willowsia (Collembola: Entomobryidae) from Guizhou Province, China. European Journal of Taxonomy 3: 1–18.

Folsom J.W. 1898. Japanese Collembola Part I. The Bulletin of the Essex Institute 29: 51–57.

Gisin H. 1967. Espèces nouvelles et lignées évolutives de Pseudosinella endogés (Collembola). Memórias e Estudos do Museu Zoológico da Universidade de Coimbra 301: 5–25.

Jordana R. & Baquero E. 2005. A proposal of characters for taxonomic identification of Entomobrya species (Collembola, Entomobryomorpha), with description of a new species. Abhandlungen und Berichte des Naturkundemuseums Goerlitz 76 (2): 117–134.

Krantz G.W. 1978. A Manual of Acarology. Corvallis, Oregon State University Book Stores, Oregon.

Lubbock J. 1870. Notes on the Thysanura. Part IV. Transactions of the Linnean Society of London (Zoology) 27 (2): 277–297.

Lubbock J. 1873. Monograph of the Collembola and Thysanura. Ray Society, London.

Ma Y. 2016. Two new species of Willowsia (Collembola: Entomobryidae) from Guizhou Province, China. Zootaxa 4158 (1): 137–145.

Mandal G.P. 2018. Collembola of India – an updated checklist. Halteres 9: 116–130.

Mari-Mutt J.A. 1981. Redescription of Willowsia jacobsoni (Borner), an entomobryid with conspicuous sexual dimorphism (Insecta: Collembola). Journal of Agriculture of the University of Puerto Rico 65: 361–373.

Mari-Mutt J.A. 1986. Puerto Rican species of Lepidocyrtus and Pseudosinella (Collembola: Entomobryidae). Caribbean Journal of Science 22 (1–2): 1–48

Pan Z. & Zhang F. 2016. Contribution to the Willowsia species having body scales of the long basal rib type: four new species and a redescription of W. qui (Collembola: Entomobryidae). European Journal of Taxonomy (245).

Pan J.L., Zhang F. & Chen J.X. 2006. A new Chinese species of the genus Willowsia from Tibet (Collembola: Entomobryidae). Journal of the Kansas Entomological Society 79 (3): 261–266.

Schäffer C. 1896. Die Collembolen der Umgebung von Hamburg und benachbarten Gebiete. Mittheilungen aus dem Naturhistorischen Museum 13: 147–216.

Saikia P., Deka J., Bharali S. et al. 2017. Plant diversity patterns and conservation status of eastern Himalayan forests in Arunachal Pradesh, Northeast India. Forest Ecosystems 4: 28.

Shi X., Chen J.X. 2004. The genus Willowsia (Collembola: Entomobryidae) and species from China. Entomotaxonomia 26: 241–248.

Shoebotham J.W. 1917. Notes on the Collembola, part 4. The classification of the Collembola; with a list of genera known to occur in the British Isles. The Annals and Magazine of Natural History 8: 425–436.

Stach J. 1965. On some Collembola of North Vietnam. Acta Zoologica Cracoviensia 10 (4): 345–372.

Szeptycki A. 1979. Morpho-Systematic Studies on Collembola. IV. Chaetotaxy of the Entomobryidae and its Phylogenetical Significance. Polska Akademia Nauk, Kraków, Poland.

Yosii R. 1971. Collembola of Khumbu Himal. Khumbu Himal 4: 80–130.

Yoshii R. & Suhardjono Y.R. 1989. Notes on the collembolan fauna of Indonesia and its vicinities. I. Miscellaneous notes, with special references to Seirini and Lepidocyrtini. Acta Zoologica Asia Orientalis 1: 23–90.

Zhang F. 2015. Some Willowsia from Nepal and Vietnam (Collembola: Entomobryidae) and description of one new species. Zootaxa 3905 (4): 489–499.

Zhang F., Xu G.L. & Chen J.X. 2007a. A new species of Willowsia (Collembola: Entomobryidae) from South China. Zootaxa 1645 (1): 63–68.

Zhang F., Palacios-Vargas J.G. & Chen J.X. 2007b. The genus Willowsia and its Mexican species (Collembola: Entomobryidae). Annals of the Entomological Society of America 100 (1): 36–40.[36:TGWAIM]2.0.CO;2

Zhang F., Chen J.X. & Deharveng L. 2011. New insight into the systematics of the Willowsia complex (Collembola: Entomobryidae). Annales de la Société Entomologique de France 47: 1–20.

Zhang F., Bellini B.C. & Soto-Adames F.N. 2019. New insights into the systematics of Entomobryoidea (Collembola: Entomobryomorpha): first instar chaetotaxy, homology and classification. Zoological Systematics 44 (4): 249–278.

How to Cite
Mandal, P., Mandal, G. P., Suman, K. K., & Bhattacharya, K. K. (2024). Two new species and one new record of Willowsia Shoebotham, 1917 (Collembola: Entomobryidae) from the Eastern Himalayan region of India. European Journal of Taxonomy, 935(1), 101–121.
Research article