Salmoneus armatus Anker 2010b: 181 Taxonomic remarks on the alpheid shrimp genus Triacanthoneus Anker, 2010 with description of a second eastern Pacific species (Malacostraca: Decapoda) Anker, Arthur Zootaxa 2020 2020-05-11 4772 3 450 468   Salmoneus armatus  Anker 2010b: 181   874KX (Anker, 2010) Anker 2020 Anker 2010 [151,607,1769,1796] Malacostraca Alpheidae Triacanthoneus GBIF Animalia Decapoda 11 461 Arthropoda species armatus comb. nov.   Figs. 7, 8      Salmoneus armatus Anker 2010b: 181, figs. 3, 4, 14a.   Material examined. 1 non-ovigerous specimen (cl 3.9 mm), FLMNH UF 51712, Panama, Bocas del Toro, Isla Colón, STRI Bay, in front of  La Cabaña, 9°21’00.8”N 82°15’45.7”W, shallow subtidal muddy flat near mangroves, in burrow between mangrove roots, suction (yabby) pump, leg. P.P.G. Pachelle,  31 March 2019[PP 19-125].   Remarks. The specimen from STRI Bay of IslaColón, Bocas del Toro, is incomplete, missing both of its chelipeds ( Fig. 8). Therefore, its identification as  T. armatus, based essentially on the armature of the carapace ( Fig. 7), must be regarded as somewhat tentative. The position of the mid-dorsal carapacial tooth at about mid-length of the carapace, the presence of sharp postorbital teeth arising directly from the anterolateral margin of the carapace, the absence of a rostral + dorsal carina, and the presence of a small triangular tubercle on the eyestalk, all suggest that this may indeed represent  T. armatus. The morphological resemblance between  T. armatus, currently only known from Panama( Anker 2010b; present study), and  T. chapelianus, known from Belizeand Cuba(Alvarez et al.2014; De Grave et al.2017), requires some attention. As mentioned above, these two species, although being superficially similar, differ in some taxonomically important details. For instance,  T. armatuscan be separated from  T. chapelianusby the presence of a small triangular tubercle on the dorsomesial surface of the eyestalk; such a tubercle is absent in both the Cuban specimen and the holotypeof  T. chapelianus(Alvarez et al. 2014: fig. 2C). In  T. armatus, the carapace does not have a strong mid-dorsal (in fact rostral + mid-dorsal) carina ( Anker 2010b: fig. 3a), which is well marked in  T. chapelianus(Alvarez et al. 2014: fig. 2A). In addition, the mid-dorsal carapacial tooth appears to be somewhat more advanced, i.e. in a more anterior position, in  T. armatus, compared to  T. chapelianus( Fig. 7; Anker 2010b: fig. 3a, b, m; Alvarez et al. 2014: fig. 2A, B; De Grave et al.2017: fig. 1B). The major chela of  T. armatusis somewhat stouter and with proportionally shorter fingers, compared to that of  T. chapelianus, whilst the finger cutting edges bear less than 10 irregular bump-like teeth in  T. armatusvs. more than 20 minute teeth in  T. chapelianus( Anker 2010b: 4a–c; Alvarez et al. 2014: fig. 3D). Furthermore, in  T. armatus, the third and fourth pereiopod ischia are armed with two robust cuspidate setae ( Anker 2010b: fig. 4g), whilst they are unarmed in  T. chapelianus(Alvarez et al. 2014: fig. 4F, G). 2611567309 2019-03-31 FLMNH La Cabana & P. P. G. Pachelle Panama Colon 9.350223 La Cabana 1 -82.262695 Bay 11 461 UF 51712 1 Bocas del Toro