Typton gnathophylloides Holthuis, 1951

Soledade, Guidomar O., Fonseca, Mytalle S. & Almeida, Alexandre O., 2015, Shallow-water stenopodidean and caridean shrimps from Abrolhos Archipelago, Brazil: new records and updated checklist, Zootaxa 3905 (1) : -

Typton gnathophylloides Holthuis, 1951

( Figs. 1 C, 2)

Material examined. 1 male, 1 ov. female, Ilha de Santa Bárbara (17°57’49”S 38°41’53”W), coll. G.O. Soledade, 03.ix.2013, intertidal, shallow tide pool, in small green sponges, UESC 1548.

Distribution. Western Atlantic—Florida (Dry Tortugas) and Brazil (Bahia) ( Chace 1972; Abele & Kim 1986; this study).

Previous records from Abrolhos. None.

Remarks. Typton gnathophylloides was hitherto known only from the type material collected in the Dry Tortugas, Florida, after Almeida et al. (2014a) re-assigned the two Brazilian records of T. gnathophylloides from Ubatuba and São Sebastião, São Paulo ( Nalesso et al. 1995; Duarte & Nalesso 1996), to Typton fapespae Almeida, Anker & Mantelatto, 2014 . Thus, the male-female pair from the Abrolhos represents the first actual record of T. gnathophylloides in Bahia, Brazil, and South Atlantic (Ilha de Santa Bárbara, 17°57’49”S 38°41’53”W). The species can be recognized (cf. Holthuis 1951; Chace 1972) by the distinctly bifid dactylus of pereiopods 3–5, rounded posterior margin of the sixth abdominal segment, and mandible without a incisor process ( Fig. 2 C). However, a comparison between the Abrolhos material and the type material from Florida is highly desirable.

Figures

FIGURE 1. Some stenopodidean and caridean (palaemonid) shrimps from Ilha de Santa Bárbara, Abrolhos, Bahia, Brazil: A, Microprosthema semilaeve (von Martens, 1872); B, Periclimenes yucatanicus (Ives, 1891); C, Typton gnathophylloides Holthuis, 1951. Scale bars = 5 mm.

FIGURE 2. Typton gnathophylloides Holthuis, 1951, from Ilha de Santa Bárbara, Abrolhos, Bahia, Brazil, diagnostic characters: A, B, D – G, male; C, female. A, frontal region and cephalic appendages, dorsal view (setae omitted); B, same, lateral view (setae omitted); C, mandible; D, major cheliped, lateral view (setae omitted); E, same, mesial view (setae omitted); F, minor cheliped, mesial view; G, uropods and telson, dorsal view (setae partially omitted). Scale bars: A, B, D – G = 1 mm; C = 0.5 mm.