Abstract
We present the first record of Ambidexter symmetricus Manning & Chace, 1971 for the state of Rio Grande do Norte, northeastern Brazil, filling a distribution gap of this species in the country. We confirm the preference of this species for seagrass meadows in the Curimataú river estuary. Lastly, a brief overview and an updated distribution map for the records of this species on the Brazilian coast are provided.
Highlights
We present the first record of Ambidexter symmetricus Manning & Chace, 1971 for the state of Rio Grande do Norte, northeastern Brazil, filling a distribution gap of this species in the country
All of specimens collected of A. symmetricus occurred in areas where marine grass was present (Wilcoxon test, p
Specimens of A. symmetricus were located visually in small pools formed during the low tide near these areas
Summary
The processid genus Ambidexter Manning & Chace, 1971 is composed of 3 species worldwide, A. panamensis Abele, 1972, A. swifti Abele, 1972, and A. symmetricus Manning & Chace, 1971, all of which distributed in the Western Atlantic and Eastern Pacific oceans (Manning and Chace 1971, Abele 1972, De Grave and Anker 2013). Ambidexter symmetricus is a small shrimp (maximum carapace length: 6.7 mm) that commonly occurs in shallow waters (0–20 m) of coastal and estuarine regions where it inhabits sea grass meadows (Halodule wrightii, Thalassia testudinum, Syringodium filiforme, and Diplanthera spp.) (Manning and Chace 1971, Lewis 1984, Souza et al 2011, Pachelle et al 2016, Rasch and Bauer 2016).
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