Distribution of Tenagodus modestus (Dall, 1881) (Mollusca, Siliquariidae) along the northern coast of Brazil: New records and biogeographical notes

This study presents new records of the marine gastropod Tenagodus modestus (Dall, 1881), a representative of the Siliquariidae family, for the northern coast of Brazil, an extensive and highly biologically productive area composed of an Amazonian Reef System. The aim of this study is to present new occurrences of the gastropod T. modestus on the North Coast of Brazil and to update the species' distribution along the Brazilian coast. The records were reported based on a review of scientific literature, museum databases, and an expedition carried out during the 1st Amazonian Corals Expedition conducted by the Centro Nacional de Pesquisa e Conservação da Biodiversidade Marinha do Norte - CEPNOR/ICMBio, between March 7 and 14, 2025, aboard the research vessel Soloncy Moura. In total, numerous records were made for the region, indicating that the species is present and contributes to the local biodiversity, and not an occasional occurrence. Thus, we confirm the occurrence of the species on the northern coast of Brazil and indicate an increase in its distribution along the Brazilian coast from Amapá to Espírito Santo.