Salmoneus chadwickae, a new alpheid shrimp (Crustacea: Decapoda: Alpheidae) from the Red Sea, with remarks on related or regional congeners

A new infaunal species of the alpheid shrimp genus Salmoneus Holthuis, 1955 (Crustacea: Decapoda: Alpheidae) and a new crustacean association from anoxic mangrove habitats in southern Vietnam

“…The genus Salmoneus Holthuis, 1955 currently contains 50 species worldwide [De Grave, Fransen, 2011;Anker et al, 2020;De Grave et al, 2020;Komai et al, 2021]. Most of the known species of the genus are freeliving, inhabiting crevices among coral rubbles, under rocks and boulders in tropical to temperate regions of all oceans [Anker, Marin, 2006;Anker, 2011;Komai, Anker, 2012;Anker, Lazarus, 2015;Komai et al, 2015;Ïuriš, Horká, 2016;Anker et al, 2015Anker et al, , 2020. Some species are, however, known as infaunal symbionts of various burrowing marine invertebrates, such as echiuran worms [Anker et al, 2020;De Grave et al, 2020], larger burrowing alpheid shrimps of the genus Alpheus (Decapoda: Caridea: Alpheidae), as well as axiidean ghost shrimps of the family Callianassidae and Callichiridae (Decapoda: Axiidea) [Dworschak et al, 2000;De Grave, 2004;Anker, Marin, 2006;Komai, 2009;Anker, 2010] (Table 1).…”

A redescription of <i>Salmoneus tafaongae</i> Banner & Banner, 1966 (Malacostraca: Decapoda: Alpheidae)

“…in the general configuration of the rostro-orbital region, the presence of a relatively deep notch on the posterior margin of the telson, and the general shape and proportions of the chelipeds and ambulatory pereiopods. Anker et al (2020) raised the possibility that S. gracilipes could be a species complex as the presence or absence of a stout cuspidate seta on the ischium of the first and second pereiopods, as well as the presence or absence of the ventral subdistal tooth on the rostrum has been variously mentioned in several subsequent records of the species (see also Miya, 1984;Ďuriš & Horká, 2016). Although a similar variation in the presence or absence of a ventral rostral tooth can be seen in the studied specimens of S. tafaongae (Fig.…”

“…The longitudinal groove on the dorsal surface of the major chela palm (Miya, 1972;Ďuriš & Horká, 2016) has been considered diagnostic for S. gracilipes, although Anker et al (2020) noted it to be less conspicuous in some specimens from Kuwait. This groove appears to be absent in S. tafaongae, with the palm being rounded in cross-section and no grooves visible, and could thus potentially serve as a distinguishing feature between these two species.…”

A New Species of the Shrimp Genus Salmoneus Holthuis, 1955 (Malacostraca: Decapoda: Alpheidae) from the Exposed Shores of Eastern and Southern Oman

“…obs.). The north-western Indian Ocean is one of the major hotspots of the diversity of Salmoneus, with at least 15 species so far recorded from the coastal areas of the Red Sea, Gulf of Aden, Arabian Sea, Gulf of Oman, and Arabian/Persian Gulf (Coutière 1897 [5], 1899 [6]; Holthuis 1958 [7]; Kazmi 1974 [8]; Banner and Banner 1981 [9]; Ďuriš and Horká, 2016 [10]; Anker 2019a [11], 2022 [2]; Anker and Ashrafi 2019 [12]; Anker et al, 2020 [13]; Ashrafi et al, 2020 [14], 2022 [15]).…”