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