Xystriogidiella juliani, Coleman, 2009

Coleman, Charles Oliver, 2009, Bogidiellidae *, Zootaxa 2260 (1), pp. 279-284 : 279-282

Xystriogidiella juliani sp. nov.

( Figs 1 , 2 )

Type material. Holotype, male, 1.6 mm, AM P71601, Research Beach , Lizard Island (14°40.856’S

145°26.788’E), 20 cm below surface of sand, sandy beach, surface, J. Just, 6 March 2005 (QLD 1843). Paratypes: 5 adults, 2 juveniles, AM P78976, same station data .

Type locality. Research Beach , Lizard Island, Queensland, Australia (14°40.856’S 145°26.788’E) .

Etymology. This species is named for the artist Mr. Julian Klein, the director of the great art performance “HUM” at the Museum für Naturkunde Berlin in the spring of 2008.

Description. Based on male holotype 1.6 mm, AM P71601.

Body slender. Head without eyes, about as long as pereonites 1–2 combined, anterior head margin evenly rounded. Antenna 1 peduncle longer than flagellum; accessory flagellum 2 articulate, article 1 twice as long as article 2, apically oblique. Antenna 2 peduncle as long as that of antenna 1; flagellum with 4 articles. Mandible of right side with 3 dentate incisor, smaller lacinia mobilis than that of left side; palp 3-articulate, article 1 and 3 subequal in length. Lower lip with inner lobes and wide gap. Maxilla 1 inner plate rounded without setae, outer plate with 7(8?) robust setae apically; palp 2 articulate. Maxilla 2 inner plate with fewer and shorter setae than outer plate. Maxillipeds inner plate with 2 terminal robust setae; outer plate taping distally with 3 terminal robust setae; palp 4–articulate, article 2 longest, article 3, subequal to 4, article 4 relatively stout.

Pereon. Pereonites 5–7 longer than preceding segments. Coxae 1–4 overlapping, roundly lobate anteriorly; coxae 5–7 subtriangular, separate. Gnathopod 1 basis expanded posteriorly; ischium slightly shorter than merus; carpus distally expanded and drawn out into ventral subacute lobe; propodus twice as long as wide, tapering distally; dactylus tip reaching half of the ventral propodus margin. Gnathopod 2 differing from gnathopod 1 in the following: basis only weakly expanded; carpus longer, without ventral lobe; propodus more slender, dactylus much shorter than half of ventral propodus margin. Pereopods 3–4: coxa subrectangular rounded, basis slender; merus weakly expanded anterodistally; carpus and propodus subequal; dactylus short and weakly curved. Pereopod 7 similar to pereopods 3–4 but much longer, basis wider and propodus much longer than carpus, especially anterior margins of both articles with groups of stout setae and long slender setae.

Pleon. Pleonites 1–3 longest, posteroventral angle pointed each with minute notch and microtrich. Pleopods with 3–articulate outer rami, inner rami wanting. Urosomites 1–2 subequal, urosomite 3 shortest. Uropod 1 peduncle longer than rami, outer ramus shorter than inner ramus. Uropod 2 peduncle about the length of subequal rami. Uropod 3 peduncle massive, rami subequal, about the length of total uropod 1, with robust setae on surface and long setae terminally. Telson emarginate (with a shallow apical depression), 1.8 x wider than long, with two robust setae on both sides.

Female (sexually dimorphic characters). Based on female, AM P78976. Pereopods 5 and 6 (missing in male holotype) similar in shape to each other but pereopod 6 longer; basis to dactylus more slender compared to pereopod 7; coxae subtriangular; basis moderately expanded posteriorly; ischium slender; merus slightly longer than carpus; carpus and propodus subequal, one long seta on propodus apically, much longer than dactylus.

Habitat. Interstitial in sandy beach.

Remarks. The species bears some resemblance to X. capricornea from Heron Island. There are some differences that indicate that the Lizard Island material belongs to another species (see table 1).

Distribution. Australia: Lizard Island, Queensland (current survey).

Figures

FIGURE 1. Xystriogidiella juliani sp. nov., holotype, male, 1.6 mm, AM P71601, Lizard Island, Great Barrier Reef. Habitus drawing mirrored for better fit on the plate.

FIGURE 2. Xystriogidiella juliani sp. nov., holotype, male, 1.6 mm, AM P71601, Lizard Island, Great Barrier Reef.