The North Atlantic Conoidean Gastropod Theta lyronuclea (Raphitomidae) in Deep-Waters of the Southwestern Atlantic

Noelia Sánchez; Guido Pastorino

doi:10.4002/040.063.0104

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Noelia Sánchez,^1,* Guido Pastorino¹

¹Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Av. Ángel Gallardo 470, 3° piso, lab. 80, C1405DJR Ciudad Autónoma de Buenos Aires, Argentina

^*Corresponding author: nsanchez@macn.gov.ar

Abstract

Theta lyronuclea (Clarke, 1959), a North Atlantic deep-water species, is recorded for the first time from the southwestern Atlantic. This constitutes the first record of the genus and the second mention of the family Raphitomidae off Argentina. The samples were collected in the Mar del Plata Submarine Canyon on the Argentine Continental slope on board the R/V Puerto Deseado at 2,934 m depth in September 2013. Photographs of radulae, penises, and details of the ornamentation of the protoconch are provided. Detailed comparison of the specimens collected with the type material and several lots from northern Atlantic localities confirmed the identification.

Citation Download Citation

Noelia Sánchez and Guido Pastorino "The North Atlantic Conoidean Gastropod Theta lyronuclea (Raphitomidae) in Deep-Waters of the Southwestern Atlantic," Malacologia 63(1), 33-40, (10 September 2020). https://doi.org/10.4002/040.063.0104

Accepted: 6 April 2019; Published: 10 September 2020

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