Jigurru vailhoggett Guerra-García, 2006

Guerra-García, José M. & Lowry, J. K., 2009, Caprellidae *, Zootaxa 2260 (1), pp. 290-327 : 311-313

Jigurru vailhoggett Guerra-García, 2006

( Fig. 11 )

Jigurru vailhoggett Guerra-García, 2006: 426 , figs 13–17.

Material examined. Holotype male, 3.1 mm, AM P61744 ( QLD 1475 ) . Paratypes: 2 males, 1 female, AM P61745 ( QLD 1475 ) .

Type locality. Coconut Beach , Lizard Island, Queensland, Australia (14º40’S 145º28’E), dead thick branching hard coral encrusted with calcareous red algae and filamentous algal turf, 8 m depth ( QLD 1475 ) .

Description. Based on holotype male, 3.1 mm and paratype female, 2.2 mm.

Head and pereonites slender. Head/pereonite 1 fused (suture absent), dorsal margin convex; eye large, distinctive. Antenna 1 well developed; slender, 0.33 x body length; peduncle article 2 longest (slightly longer than article 3), article 3 straight; accessory flagellum absent; flagellum 0.66 x peduncular length, with more than 2 articles, proximal article composed of 3 articles. Antenna 2 0.4 x antenna 1 length, slender; peduncle with several feeble setae; flagellum 0.4 x peduncular length, with 2 articles. Labrum weakly notched, forming rounded quadrilateral projections. Mandible right incisor with 5 teeth, right lacinia mobilis with 2 large teeth, follow by 2 plates, accessory setal row with 4 setae; molar absent; left incisor with 5 teeth, lacinia mobilis with 5 teeth, with 5–6 trapezoid plates decreasing in size; palp 3–articulate, palp setal formula 1-x-1. Maxilla 1 outer plate with 6 stout apical setal-teeth. Maxilliped inner plate subequal to outer plate; round (inner plates almost fused); subequal to inner plate; palp article 2 setose on inner margin (with about 6 setae on inner margin); palp article 4 not enlarged, falcate.

Pereon. Pereonites 2 to 7 not fused; pereonite 5 longest. Pereonite 1 without projections. Gnathopod 1 distinctly smaller than gnathopod 2; propodus triangular, palm begins about 1/3 to 2/5 along posterior margin, smooth, without large, rounded knob proximally; dactylus curved, inner margin smooth. Pereonite 2 without projections. Gnathopod 2 situated toward anterior end of pereonite 2; basis about 1.5 x length of, or subequal in length to pereonite 2, without anterodistal projection; ischium without anterodistal projection; propodus subovate, large, anterodistal margin convex, without anterodistal triangular projection, without projections along mid-anterior margin; palm without proximal cavity filled with membranous sack, proximal projection with 3 robust (grasping) setae, margin convex, smooth, without hook-like projection at base of dactylus, without distal shelf, sinus or midpalmar projection. Pereonite 3 without projections. Pereopod 3 absent. Pereonite 4 without projections. Pereopod 4 absent. Pereopod 5 reduced or vestigial, with 3 articles or with 4 articles (3 articles, but basal article almost divided into 2 articles), slender. Pereopods 6 and 7 simple. Pereopod 6 basis and propodus subequal in length. Pereopod 7 similar to pereopod 6.

Gills on pereonites 2 to 4. Pereonite 3 gill length about 1/3 of corresponding pereonite, straight, ovate. Pereonite 4 gill length about 1/4 of corresponding pereonite, straight, ovate.

Pleon. Uropod 1 present; peduncle fused to pleon; ramus length about 6–8 x width. Uropod 2 ramus well developed.

Female (sexually dimorphic characters). Oostegites scarcely setose. Gnathopod 2 similar to male, but with dactylus slightly more elongate.

Remarks. Jigurru vailhoggett differs from other caprellids on the GBR in having pereopod 3 and 4 absent, pereopod 5 reduced to four articles and gills on pereonites 2 to 4.

Distribution. Australia. Queensland: Coconut Beach, Lizard Island (Guerra-García 2006).

Figures

FIGURE 11. Jigurru vailhoggett Guerra-García, 2006. A, Female paratype, 2.2 mm, AM P61745; B, male holotype, 3.1 mm, AM P61744, Coconut Beach, Lizard Island, Great Barrier Reef. Refigured from Guerra-García (2006).