Shallow-water caridean shrimps from southern Bahia, Brazil, including the first record of Synalpheus ul (Ríos & Duffy, 2007) (Alpheidae) in the southwestern Atlantic Ocean Author Almeida, Alexandre O. Author Boehs, Guisla Author Araújo-Silva, Catarina L. Author Bezerra, Luis Ernesto A. text Zootaxa 2012 3347 1 35 journal article 10.5281/zenodo.214608 10000391-ec0f-495f-8ee4-61b667fa68e1 1175-5326 214608 Macrobrachium acanthurus ( Wiegmann, 1836 ) Palaemon acanthurus Wiegmann, 1836 : 150 . Material examined. 1 m , 1 f, 07.V.2008 , Canavieiras, Patipe River, MZUESC 1237. See report by Almeida et al . (2006). Distribution. North Carolina to Texas, Mexico , Cuba , Haiti , Dominican Republic , Puerto Rico , Nicaragua , Panama , Colombia , Venezuela , Suriname and Brazil (Pará to Rio Grande do Sul) ( Melo 2003 ). Ecological notes. Juveniles were collected in the mangrove of Acuípe River, at low tide, in pools among roots of Rhizophora mangle . The specimen from the Almada River estuary, a young female (MZUESC 560) (see Almeida et al . 2006), was found among roots of the water hyacinth Eichhornia crassipes , and may have been carried there by the river current. In the Patipe River, adult specimens were obtained from plant debris, at a salinity of 9 psu. Previous records. locality not informed (von Ihering 1897 , as Palaemon acanthurus ; Sawaya 1946 , as M. acanthurus ; Holthuis 1952 , as M. acanthurus ); Ilhéus (Almeida et al. 2006, 2008a, as M. acanthurus ; Ferreira et al . 2010 , as M. acanthurus ); Camamu Bay ( Almeida et al. 2007b , as M. acanthurus ); Itacaré, Uruçuca and Una ( Almeida et al. 2008a , as M. acanthurus ); Mar Grande and Mucuri ( Ferreira et al. 2010 , as M. acanthurus ).