Odontozona foresti Hendrickx, 2002

Hendrickx, Michel E. & Ayón-Parente, Manuel, 2014, A new deep-water species of Odontozona (Decapoda: Stenopodidea: Stenopodidae) from the East Pacific, and new record of O. foresti Hendrickx, 2002, Zootaxa 3835 (3), pp. 338-348 : 346-347

Odontozona foresti Hendrickx, 2002

( Figs. 5 , 6 )

Odontozona foresti Hendrickx, 2002: 406 , figs. 1–3.– Hendrickx, 2008: 47. – Hendrickx, 2012: 287, 314, fig. 2D.

Material examined. One male, CL 14.0 mm, TALUD XV cruise, St. 5F (23°18'40"N, 111°19'37"W), 6 August 2013, benthic sledge, 1035–1108 m depth (EMU-10087).

Colour. From a fresh specimen. Body light salmon, with flush or orange on posterior half of abdominal somites, telson and uropods; pereopods dark orange; distal portion of antennal flagellae light pink; major cheliped light salmon, except for distal 2/3 of chela which is whitish. Eyes opaque, yellowish ( Fig. 5 ).

Distribution. Presently known only from three localities in the East Pacific, off the west coast of Baja California (this contribution), off western Mexico ( Hendrickx 2008), and in the Gulf of California (type locality), between 1035 and 1270 m depth. Environmental data recorded close to bottom at the sampling site are 3.5ºC and 0.46 mg O 2 ml/l, which is about half the oxygen concentration recorded at the type locality (TALUD VI, St. 34; 3.5ºC; 0.86 O 2 ml/l).

Remarks. Odontozona foresti was originally described based on a single female (CL 16.5 mm) collected in the Gulf of California at 1240–1270 m depth. Another female specimen was later reported at 1058–1088 m depth, off western Mexico (18º32'02"N, 103º57'45"W) by Hendrickx (2008). The male examined herein is very similar to female holotype in carapace, abdomen and telson armature. The third pereiopod ( Fig. 6 A) (right missing) of the male, however, is much longer than in the female, about 3.8 times carapace length (vs. 2.2 in the holotype), and its armature is much different compared to the female holotype; a strong, subrectangular, finely denticulate tooth is projecting from the fixed finger ( Fig. 6 B) into a rounded cavity in the dactylus; there are 3 spines (plus 2 spinules) on the upper margin of the dactylus, two rows of strong spines on the dorsal (submarginal) and ventral (marginal) faces of the carpus, one dorsal and one ventral rows of marginal teeth on merus, and one dorsal row of strong spines on the ischium, which also bears a few spinules on the ventral margin. These variations are related to sexual dimorphism. A moderately long, ventral spine is present on somites 1–4, which is also characteristic of male specimens within the genus. Pleopod 1 as illustrated ( Fig. 6 C).

Figures

FIGURE 5. Odontozona foresti Hendrickx, 2002, male (CL 14.0 mm) (EMU- 10087), fresh specimen: A, lateral view; B, dorsal view.

FIGURE 6. Odontozona foresti Hendrickx, 2002, male (CL 14.0 mm) (EMU- 10087): A, right third pereiopod; B, same, detail of chela, inner view; C, right first pleopod, anterior view. Scale bars = A, 5 mm; B, 2 mm; C, 2 mm.