Synalpheus yano ( Ríos & Duffy, 2007 )

Paixão, Pedro Henrique, Terossi, Mariana, Pasinatto, Karmine, Bochini, Gabriel Lucas & Almeida, Alexandre Oliveira, 2025, Shrimps of the genus Synalpheus Spence Bate, 1888 (Decapoda: Alpheidae) from Northeast Brazil region, Zootaxa 5666 (1), pp. 1-52 : 37-38

Synalpheus yano ( Ríos & Duffy, 2007)

Material examined: Pernambuco — Continental Shelf off Recife : 1 OV, 27.ii.2018, 8°13′52.1′′S 34°37′41.2′′W, 51.8 m depth , in sponge, DZ / UFRGS 7062 ; 1 M, same data as DZ/ UFRGS 7062 , MOUFPE 21547 ; 1 M, 10.v.2018, 08°23′04.3′′S 34°40′07′′W , 80.0 m depth, in sponge, DZ / UFRGS 7061 ; 1 M, same data as DZ/ UFRGS 7061 , in sediment, MOUFPE 21788 ; 1 M, 07.ii.2018, 8°08′43.7′′S 34°34′22.6′′W , 54.0 m depth, in rhodoliths, MOUFPE 21563 ; 1 M, 07.ii.2018, 8°08′44.2′′S 34°34′23.2′′W , 55.0 m depth, MOUFPE 21545 ; 1 OV, same data as MOUFPE 21545, MOUFPE 21548 ; 1 M, 27.ii.2018, 8°13′52.1′′S 34°37′42.7′′W , 50.0 m depth, MOUFPE 21566 ; 1 M, same data as MOUFPE 21566, MOUFPE 21567 ; 1 F, same data as MOUFPE 21566, MOUFPE 21560 ; 1 M, 27.ii.2018, 8°13′33.0′′S 34°37′40.3’’W, 50.6 m depth , MOUFPE 21577 ; 1 OV, 27.ii.2018, 8°13′25.4′′S 34°37′43.2′′W , 51.0 m

depth, MOUFPE 21544 ; 1 M, 27.ii.2018, 8°13′52.1′′S 34°37′39.1′′W, 50.8 m depth, MOUFPE 21550 ; Tamandaré : 2 M, xii.1972, MOUFPE 8864 ; Bahia — Camamu : 1 M, Baía de Camamu, MOUFPE 21864 .

Description: Ríos & Duffy (2007) and Anker et al. (2012).

Distribution: Gulf of Mexico, Belize, Panama, Jamaica, and Brazil (Ceará, Pernambuco, and Bahia) ( Ríos & Duffy, 2007; Anker et al. 2012; Anker & Pachelle 2014; this study).

Ecology: In shallow reefs and nearby areas with abundance of gravel and sponges; nearby mangroves and seagrass banks; symbiont of Lissodendoryx cf. strongylata , L. colombiensis , H. caerulea , and C. podatypa ; in heterosexual pairs; 1– 80 m ( Ríos & Duffy, 2007; Anker et al. 2012; this study). Material from the continental shelf off Recife sampled in rhodoliths, sediment and sponges.

Remarks: Synalpheus yano is characterized by a square to broadly rounded orbital teeth and the absence of a scaphocerite blade, which is reduced in other members of the group ( Ríos & Duffy, 2007; Anker et al. 2012). Morphological variations have been previously reported in S. yano , particularly in males sampled in Panama and analyzed by Anker et al. (2012), where the orbital teeth were more triangular. The rostrum was missing in one specimen analyzed in this study (1 M, MOUFPE 8864).

Synalpheus yano has been reported on the Brazilian coast only from Ceará. Herein, we expand the southern known range of the species in the western Atlantic as well as its bathymetric distribution from 3 ( Anker et al. 2012) to 80 m.