Gnathostenetroides

Ortiz, Manuel, Winfield, Ignacio & Varela, Carlos, 2012, First records of peracarid crustaceans from the Cayo Matias Ocean Blue Hole, SW Cuba, with the description of two new species, Zootaxa 3505, pp. 53-66 : 64-65

Gnathostenetroides sp.

( Fig. 8 )

Material examined. Juvenile female, non ovigerous, length 1.9 mm, collection of the Acuario Nacional de Cuba (ANC07.1.3.012)

Remarks. This species has small lateral eyes with 8 ommatidia; rostrum with a medial notch ( Fig. 8 A); antenna 2 with 8 articles, with distal aesthetasc ( Fig. 8 B); first pereonal segment almost as long as segment 2; article 2 of pereopod 2 shorter than article 3, article 4 as long as 2, article 5 shorter than 6, article 7 broken ( Fig. 8 C); pereopods 3–7 incomplete; pleopod 1 absent; pleopod 2 with rami fused into an almost round foliaceous plate ( Fig. 8 F); pleopod 3, inner ramus foliaceous and entire, outer with 2 article ( Fig. 8 D); pleopod 4, both rami wide and naked ( Fig. 8 E); pleotelson rounded with one notch each side, and distal end crenulated ( Fig. 8 G).

This is the first record of this genus for Cuban waters and the Caribbean Sea. Although there are only two species known in the world, i.e. G. laodicense Amar, 1957 described from the Mediterranean Sea, and G. pugio Hooker, 1985 from the Middlegrounds in Florida ( Kensley & Schotte 1989), we have decided not to describe a new species on the basis of this damaged specimen as there is very little information on the females of these rare isopods.

Figures

FIGURE 8. Gnathostenetroides sp. A, dorsal view of body; B, antenna 2. C, pereopod 2; D, pleopod 3; E, pleopod 4; F, pleopod 2; G, telson.