(Figs 41, 42, Pl. 2D)

Type Material. Holotype, male, 3.5 mm, AM P70562, Mangrove Beach, Lizard Island (14°40.78’S 145°27.76’E), mangrove detritus, Rhizophora stylosa in lagoon, 0.5 m, T. Krapp-Schickel, 23 February 2005 (QLD 1624). Paratypes. 5 females, AM P70583 (QLD 1629); 1 male, 1 female, AM P70584 (QLD 1631).

Type Locality. Mangrove Beach, Lizard Island, Queensland, Australia (14°40.78’S 145°27.76’E).

Etymology. Named after the mangrove Rhizophora, in which the type material was collected.

Description. Based on holotype, male 3.5 mm, AM P70562.

Head. Head lateral cephalic lobes apically truncated. Antenna 1 flagellum with about 15 articles; accessory flagellum absent or vestigial. Antenna 2 with few long setae. Lower lip with fine setae only. Maxilla 1 inner plate without setae. Mandible, palp article 3 longer than 2, posterior margin substraight, with distal setae.

Pereon. Pereonites without sternal spines. Gnathopod 1 enlarged in males only; coxa anterodistally rounded; basis robust, half or more as broad as long, with few or no setae present along margin, with setae sparse or absent, anterodistal margin with flange weak or absent; ischium anterior margin without flange; merus not greatly elongated, fused along its entire length with carpus, posterior margin with sparse setae or setae absent, without posterodistal spine; carpus one and one third to one and one half length of propodus, with setae sparse or absent, with one spine; propodus anterior margin moderately clothed in short setae, palm evenly continuous with posterior margin, margin entire, palm corner undefined; dactylus more than half length of propodus, significantly overlapping palm. Gnathopod 2 basis anterior margin sub-straight, weakly setiferous, anterodistal margin without spine, posterodistal margin without robust setae; carpus longer than propodus, with long or short moderately spaced setae; propodus with long sparse setae. Pereopod 3 basis anterior margin unexpanded, straight or weakly concave. Pereopod 7 significantly less than 125% length of pereopod 6.

Pleon. Epimeron 3 posterodistal margin rounded. Uropod 1 distoventral spine shorter than peduncle. Uropod 2 peduncle without distoventral spine or with vestigial spine. Uropod 3 uniramous, inner ramus at least twice length of peduncle.

Female (sexually dimorphic characters). Based on paratype, female 4.5 mm, AM P70583. Gnathopod 1 basis slender, much less than half as broad as long; carpus subequal in length with propodus; palm defined by strong posterodistal spine.

Habitat. Mangrove litter.

Remarks. Differs from G. bonnieroides by lacking a submarginal spine on the posterior margin of the carpus of the male gnathopod 1.

Distribution. Australia. Queensland: Mangrove Beach, Lizard Island (current study).