Globosolembos ovatus Myers, 1985

Myers, Alan A., 2009, Aoridae *, Zootaxa 2260 (1), pp. 220-278 : 263-264

Globosolembos ovatus Myers, 1985

( Figs 33 , 34 )

Lembos (Globosolembos) ovatus Myers, 1985a , 354, figs 228–230.

Globosolembos ovatus — Myers, 1985b, 47, figs 34–35. — Myers, 1989, 66, table 1. — Myers, 1995, 33.

Material examined. 2 males, 4 females, AM P70721 (QLD 1645) ; 4 males, 1 female, 1 juvenile, AM P70889 (QLD 1653) ; 1 male, AM P70787 (QLD 1668) ; 2 males, 3 females, AM P71192 (QLD 1730) ; 1 male, 2 females, 2 juveniles, AM P71115 (QLD 1748) ; 1 male, AM P71169 (QLD 1751) ; 1 male, AM P71288 (QLD 1763) ; 1 male, AM P71456 (QLD 1789) ; 2 males, 2 females, AM P71468 (QLD 1792) ; 1 female, 3 juveniles, AM P71357 (QLD 1803) .

Type locality. Taunovo Bay , Viti Levu, Fiji (~ 18°16'S 178°2'E) .

Description. Based on male, 2.9 mm, AM P70889.

Head. Head lateral cephalic lobes apically truncate. Antenna 1 flagellum with about 16 articles Antenna 2 with few long setae. Lower lip with fine setae and stout setae. Maxilla 1 inner plate with 1 long pectinate apical seta. Mandible, palp article 3 longer than 2, posterior margin weakly falcate, posterior margin with setae of more than two distinct lengths.

Pereon. Pereonites 2–4 with apically sub-acute or rounded sternal spines. Gnathopod 1 enlarged in both sexes; coxa produced anterodistally, rounded; basis robust, half or more as broad as long, posterodistal margin without setae, anterodistal margin with strong flange; ischium anterior margin without flange; merus fused along its entire length with carpus, posterior margin without posterodistal spine; carpus one half length of propodus, anterior margin without spine, posterior margin without spines; propodus anterior margin moderately setiferous, posterior margin weakly convex, palm present, evenly convex, delimited from posterior margin by weak rounded lobe, robust seta defining palm, without spine near base of dactylus; dactylus more than half length of propodus, fitting palm. Gnathopod 2 subchelate; basis anterodistal margin with weak flange, posterodistal margin without robust setae; with few setae along its length; merus not enlarged or produced away from carpus; carpus and propodus subequal in length, anterior margin with long dense setae; propodus anterior margin with long dense setae, palm with robust seta defining palm. Pereopod 3 without brush of long setae on merus. Pereopod 6 basis not produced posterodistally. Pereopod 7 significantly less than 125% length of pereopod 6.

Pleon. Epimeron 3 posterodistal margin rounded. Uropod 1 rami subequal, peduncle much longer than broad, distoventral spine one quarter length of peduncle. Uropod 2 biramous; peduncle with rudimentary distoventral spine less than one quarter of peduncle. Uropod 3 biramous, rami distinctly unequal, inner ramus 1.5 x length of peduncle; outer ramus lacking a second article. Telson with distal fine setae only.

Female (sexually dimorphic characters). Based on female, 3.0 mm, AM P70721. Sternal spines absent. Gnathopod 1 carpus a little over one half length of propodus; propodus with palm defined by a right angle and a robust seta. Gnathopod 2 basis anterodistal margin without flange; carpus shorter than propodus, with sparse setae; propodus with long setae, less dense that those of male.

Habitat. Primarily coral rubble and coarse sand. Occasionally in Halimeda , mixed red and brown algae, tunicates.

Remarks. The species resembles G. longispinosus in general appearance but the posterodistal margin of the male gnathopod 1 propodus is rounded in G. ovatus (acute in G. longispinosus ). In addition, the uropods 1 and 2 peduncles have very short distoventral spines in G. ovatus whereas they are longer than the peduncle in G. longispinosus .

Distribution. Australia. Queensland: Lizard Island (current study). Papua New Guinea. Madang lagoon ( Myers 1995). Vanuatu. Efate Island ( Myers 1985a). Fiji: Viti Levu ( Myers 1985 a, 1985b). Western Samoa. Upolu Island ( Myers 1985a). Society Islands. Moorea ( Myers 1989).

Figures

FIGURE 33. Globosolembos ovatus (Myers, 1985a), male, 2.9 mm, AM P70889, Watsons Bay, Lizard Island, Great Barrier Reef.

FIGURE 34. Globosolembos ovatus (Myers, 1985a), male, 2.9 mm, AM P70889, female, 3.0 mm, AM P70721, Watsons Bay, Lizard Island.