Shallow-water anomuran and brachyuran crabs (Crustacea: Decapoda) from southern Bahia, Brazil

Abstract

The objective of this study was to determine the taxonomic composition and ecological aspects of decapod crustacean species belonging to the infraorders Anomura and Brachyura in shallow marine and estuarine waters from southern Bahia, a coastline about 640 km in extent, corresponding to approximately 7% of the Brazilian coast. Sixteen species of the infraorder Anomura and 68 of the infraorder Brachyura are reported for the study area. The most important families in terms of number of species were the Panopeidae with 11 species, and the Ocypodidae and Portunidae with 9. Among the Brachyura, the southern distribution of the species Austinixa leptodactyla Coelho, 1997 (Pinnotheridae), endemic to Brazil, is extended from the coast of Sergipe to Bahia (Prado, Cumuruxatiba Beach, 17°06'18.6"S, 39°10'50.4"W). The ocypodid Uca (Leptuca) cumulanta Crane, 1943 and also the pinnotherids Austinixa aidae (Righi, 1967) and Fabia byssomiae (Say, 1818) are reported for the first time from the Bahia coast. The specimen of F. byssomiae examined was collected in the mantle cavity of the clam Macoma constricta (Bruchière, 1792) (Bivalvia: Tellinidae), a new host record for the species.

Pea crab-oyster interspecific interaction on tropical coast: Brachyuran pinnotherid Zaops ostreum (Say, 1817) living in the host bivalve ostreid Crassostrea brasiliana (Lamarck, 1819)

“…Sustent., 2023, vol. 10, n. 24, p. 183-195. The genus Zaops Rathbun, 1900 comprises three valid species of the Family Pinnotheridae found in West Atlantic waters, among which only Zaops ostreum (Say, 1817) is reported on Brazilian coastal environments from Northeast to Southern Brazil (Nascimento and Pereira, 1980;Martins and D'Incao, 1996;Sankarankutty and Ferreira, 2001;Bezerra et al, 2006;Felder et al, 2009;Almeida et al, 2010;Boehs et al, 2012). Z. ostreum is characterized by arched-shape orbits, cephalothorax curved on both sides of the carapace, clypeus emarginate at anterior end, and chelipeds covered with white hairs (Say, 1817;Melo, 1996).…”

“…Z. ostreum is characterized by arched-shape orbits, cephalothorax curved on both sides of the carapace, clypeus emarginate at anterior end, and chelipeds covered with white hairs (Say, 1817;Melo, 1996). It is known to be parasitic on bivalve oysters of the genus Crassostrea Sacco, 1897, including Crassostrea rhizophorae (Guilding, 1828) and Crassostrea virginica (Gmelin, 1791) (Stauber, 1945;Christensen and McDermott, 1958;Beach, 1969;Nascimento and Pereira, 1980;Martins and D'Incao, 1996;Melo, 1996;O'Beirn and Walker, 1999;Sankarankutty and Ferreira, 2001;McDermott, 2009;Almeida et al, 2010;Hanke et al, 2015), which can cause economic losses in aquaculture. Z. ostreum has an interspecific relationship with the oysters' species, feeding on the phytoplankton and zooplankton that these oysters filter (McDermott, 1997;Almeida et al, 2010;Hanke et al, 2015).…”

“…It is known to be parasitic on bivalve oysters of the genus Crassostrea Sacco, 1897, including Crassostrea rhizophorae (Guilding, 1828) and Crassostrea virginica (Gmelin, 1791) (Stauber, 1945;Christensen and McDermott, 1958;Beach, 1969;Nascimento and Pereira, 1980;Martins and D'Incao, 1996;Melo, 1996;O'Beirn and Walker, 1999;Sankarankutty and Ferreira, 2001;McDermott, 2009;Almeida et al, 2010;Hanke et al, 2015), which can cause economic losses in aquaculture. Z. ostreum has an interspecific relationship with the oysters' species, feeding on the phytoplankton and zooplankton that these oysters filter (McDermott, 1997;Almeida et al, 2010;Hanke et al, 2015). Individuals of Z. ostreum can also occur in the pallial cavity of other bivalves, such as Anomalocardia flexuosa (Linnaeus, 1767), Anomia peruviana d'Orbigny, 1846, Mytilus edulis Linnaeus, 1758, and members of the genus Pecten Müller, 1776 (Bezerra et al, 2006;Sabry et al, 2011;de Gier and Becker, 2020).…”