Abstract
Abstract The family Pseudorhombilidae Alcock, 1900 is widely distributed in the tropical western Atlantic, occurring from shallow waters to the continental slope, inhabiting sandy, gravelly, or muddy substrates. Despite the broad distribution of this family in the Americas, the species Pseudorhombila octodentata Rathbun, 1906 and Pseudorhombila quadridentata (Latreille, 1828) have been observed only in a few localities, with disjunct records, and Robertsella meridionalis Tavares and Gouvea, 2013 has been recorded only in one type locality (Santa Catarina, Brazil). The present work reports new occurrences of P. octodentata from the state of Sergipe and P. quadridentata from the state of Amapa, and the second occurrence of R. meridionalis from the state of Rio Grande do Norte, Brazil. These new records are an important contribution to the understanding of distributional patterns of pseudorhombilid crab species in Brazil and to the increase in biodiversity data of crustaceans from the North and Northeast regions of Brazil.
Highlights
The family Pseudorhombilidae Alcock, 1900, comprises 16 genera and 43 species, which are widely distributed in the western Atlantic, with several records provided by A. Milne-Edwards (1880), Chace (1939), Guinot (1969a), Hernández Aguilera (1982), Williams (1984), Hendrickx (1998), Nizinski (2003), and Felder (2020)
The R. meridionalis specimen was collected as part of a project for evaluation of benthic and planktonic biota in the offshore portion of the Potiguar and Ceará basins (Bpot), developed by the Brazilian oil company Petrobras (Petróleo Brasileiro S/A) on board the R/V Seward Johnson in May 2011 in Potiguar Basin, encompassing the states of Ceará (CE) and Rio Grande do Norte (RN), Northeast region of Brazil
All specimens were evaluated for carapace length (CL) and carapace width (CW), which were measured with a digital caliper (± 0.01 mm)
Summary
The family Pseudorhombilidae Alcock, 1900, comprises 16 genera and 43 species, which are widely distributed in the western Atlantic, with several records provided by A. Milne-Edwards (1880), Chace (1939), Guinot (1969a), Hernández Aguilera (1982), Williams (1984), Hendrickx (1998), Nizinski (2003), and Felder (2020). Despite their broad distribution in the western Atlantic, only the species P. octodentata and P. quadridentata have previously been recorded from Brazilian waters (Melo, 1996; 2010; Silva and Calado, 2002; Coelho et al, 2008; Boos et al, 2012).
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