RESEARCH NOTE

Helicodiscus theresa from Brazil is the exotic species
Helicodiscus parallelus (Gastropoda, Helicodiscidae)

Fernanda S. Silva¹, Robert G. Forsyth², Rodrigo B. Salvador³

¹ Museu de Zoologia da Universidade de São Paulo, São Paulo, SP, Brazil.
² New Brunswick Museum, New Brunswick, Canada.
³ Museum of New Zealand Te Papa Tongarewa, Wellington, New Zealand.


Helicodiscus Morse, 1864 (family Helicodiscidae) is a genus of terrestrial snails with over 20 valid species (MolluscaBase 2020) and distributed almost exclusively over North America (Solem 1984). Helicodiscus theresa Thiele, 1927 has been described as native to Brazil, but herein we reassert the identity of this species as the North American Helicodiscus parallelus (Say, 1821), exotic to Brazil. (…)

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Cite as: Silva F.S., Forsyth R.G. & Salvador R.B. (2020) Helicodiscus theresa from Brazil is the exotic species Helicodiscus parallelus (Gastropoda, Helicodiscidae). Strombus 26(1–2): 15–18.

Publication date: 04 October 2020.