Alpheus formosus Gibbes, 1850

Giraldes, Bruno Welter & Freire, Andrea Santarosa, 2015, Extending the southern range of four shrimps (Crustacea: Decapoda: Stenopodidae, Hippolytidae and Alpheidae) in southwestern Atlantic (27 S) and confirming the presence of Mediterranean Stenopus spinosus Risso, 1827 in Brazil, Zootaxa 3972 (3), pp. 419-431 : 424

Alpheus formosus Gibbes, 1850

( Figure 4 )

References. Soledade & Almeida 2013: 98, Figure,5D; Anker et al. 2008.

Material examined. 1 ovigerous female, (TL: 35mm), 0 6 Apr. 2014, Deserta Island-SC, 10m, 27°16'30.9''S 48°19'36.2''W, ( LCP /UFSC-084), hidden under rocks.

Material observed. 6 individuals (3 couples), 0 4 and 0 5 Apr. 2014, Galé Island–SC, 3m, 4,3m and 11m, 27°10'66.4''S 48°24'40.1''W, and 27°10'88.7''S 48°24'61.5''W.

Distribution. Recorded in the Western Atlantic—Bermuda, North Carolina, Florida, Gulf of Mexico, Bahamas, West Indies, Central America, Colombia, Venezuela, and Brazil. In Brasil, occurs in Atol das Rocas (3o S), Fernando de Noronha (13o S) and from Ceará (03o S) to Paraná (25o S).

Remark. The present record (27o S) extends the species range 200 km towards the south in the western Atlantic.

Figures

FIGURE 4. Alpheus formosus Gibbes, 1850. (A) superior view, alive animal with natural posture and colour pattern highlighting the unarmed merus of third pereiopod; (B) lateral view with natural colour pattern; (C) telson and uropods with dark-coloured spiniform setae in laterals; (D) close-up of lateral view highlighting the rostrum, the teeth on orbital hoods and the proportion of proximal antennal and antennular segments; (E) close-up of superior view highlighting the rostrum, the teeths on orbital hoods and the proportion of proximal antennular segments; (F) major first chela; (G) minor first chela with balaeniceps setae; (H) Merus of chelipeds with distal tooth on ventromesial margin. Scale bars: a – f 5 mm; g – h 1 mm.