Range extension of Guyanella clenchi (Altena, 1968) (Bivalvia, Lucinidae) with new records from Abrolhos Bank, Brazil

Bárbara Louise Valentas-Romera,Flávia Maria Pereira Costa,Ana Maria Setubal Pires-Vanin

doi:10.15560/15.4.549

Abstract

Guyanella clenchi (Altena, 1968) is newly reported from Abrolhos Bank, northeastern Brazil. The new records extend the distribution of this species to the Southern Atlantic and reinforce the known overlap between the Caribbean and South American marine faunas. Even though it inhabits well-sampled regions, G. clenchi is a poorly known species which is not well represented in collections. The new occurrence of the species in the Southern Atlantic draws attention to the necessity of further improvement in sampling strategies aimed at filling in the distribution gaps of species.

Highlights

Lucinidae is one of the most diverse families of marine bivalves
The new occurrence of the species in the Southern Atlantic draws attention to the necessity of further improvement in sampling strategies aimed at filling in the distribution gaps of species
Thirty-eight specimens of Guyanella clenchi were found in sediment samples collected at Abrolhos Bank, Bahia, Brazil (Fig. 2A, B)

Summary

Introduction

Lucinidae is one of the most diverse families of marine bivalves It contains approximately 380 species divided into nearly 100 globally distributed genera, ranging from intertidal to great depths and inhabiting a vast array of marine habitats (Mikkelsen and Bieler 2007, Taylor et al 2014, Taylor and Glover 2016, MolluscaBase 2019). Lucinids show a diverse range of shell sizes, with length varying from 1.5 to over 150 mm (Mikkelsen and Bieler 2007, Huber 2015). Their shells are usually round to elliptical, white or cream-coloured externally, and covered by a thin or thick periostracum.

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Conclusion