RESEARCH NOTE

Predation of Oligochaeta by the exotic invasive snail Tanychlamys indica
(Gastropoda, Ariophantidae) and expansion of the invasive species’
distribution in Brazil

Aquiles S. Brito¹, Ewerton O. Machado¹, Janine O. Arruda²

¹ Centro Multidisciplinar, Universidade Federal do Acre, campus Floresta, Cruzeiro do Sul, Acre, Brazil.
² Museu de Ciências Naturais do Rio Grande do Sul, Secretaria do Meio Ambiente do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.

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The terrestrial snail Tanychlamys indica (Godwin-Austen, 1883) (Ariophantidae) is native to South Asia, occurring in northeastern India, Nepal, Bhutan, and Bangladesh (Preece et al. 2022). The genus Tanychlamys Benson, 1834 currently comprises 249 species (MolluscaBase 2026), with T. indica as its type species. This species has been recorded outside its native range in several regions of the world, including the United States (Revynthi et al. 2022), Japan (Kudo et al. 2022), Saudi Arabia and Qatar (Abobakr et al. 2022), and Brazil (Agudo-Padrón & Luz 2017).

In Brazil, the first records were reported from the states of Paraná and Santa Catarina associated with citrus seedlings, although no voucher material was deposited in scientific collections. Later, Rosa et al. (2022) expanded the known distribution of the species in the country based on photographic observations available on the iNaturalist platform, including records from Amazonas, Acre, Mato Grosso, Goiás, Minas Gerais, and São Paulo. On that platform (…)

Cite as: Brito A.S., Machado E.O., Arruda J.O. (2026) Predation of Oligochaeta by the exotic invasive snail Tanychlamys indica (Gastropoda, Ariophantidae) and expansion of the invasive species’ distribution in Brazil. Strombus 30(12): 5–9. https://doi.org/10.5281/zenodo.19598852

Publication date: 15 April 2026.