Latigammaropsis hermes, Myers, 2009

Myers, Alan A., 2009, Photidae *, Zootaxa 2260 (1), pp. 771-799 : 783-785

Latigammaropsis hermes sp. nov.

( Figs 9 , 10 )

Type material. Holotype, male, 2.5 mm, AM P71531, Yonge Reef, Half Mile Opening (14°34’19”S 145°36’51”E), Halimeda opuntia (green coralline alga), 10 m, I. Takeuchi, R. T. Springthorpe & O. Coleman, 5 March 2005 ( QLD 1823 ) . Paratypes: 13 unsexed, AM P75463, same data as holotype .

Additional material examined. 1 male, 4 females, AM P70635 ( QLD 1621 ) ; 1 male, 1 female, AM P71318 ( QLD 1781 ) ; 2 males, AM P71340 ( QLD 1804 ) .

Type locality. Yonge Reef , Lizard island, Queensland, Australia (14°34’19”S 145°36’51”E) .

Etymology. Greek mythology: Hermes , messenger of the Gods

Description. Based on holotype, male, 2.5 mm, AM P71531.

Head. Head anteroventral margin strongly recessed, extending behind posterior margin of eye; eye lageniform, small, distinctly less than one quarter head length, eyes partially situated within the lateral lobe of the head; lateral cephalic lobes rounded. Mandible palp article 3 distinctly shorter than article 2, spatulate, widest subdistally. Antenna 1 peduncular article 1 subequal with article 3; flagellum with 10 articles; accessory flagellum distinct and multiarticulate. Antenna 2 long, more than half body length, flagellum distinctly longer than peduncular article 5, with 6 articles.

Pereon. Coxae 1–2 without spines on distal margin. Gnathopod 1 of distinctly different size from gnathopod 2; carpus anterior margin with fine setae only, subequal to propodus; propodus twice as long as wide, posterodistal margin evenly rounded. Gnathopod 2 basis anterior margin with few setae; carpus with distinct free posterior expansion; propodus very long, more than 2.5 x as long as carpus, posterodistal margin with robust seta and with multiple excavations; dactylus short, half length of propodus. Pereopod 3 merus with short or few long setae on anterior margin. Pereopod 5 basis with few setae, slightly expanded, distinctly longer than broad.

Pleon. Urosomites 1–2 without dorsolateral spines. Epimeron 3 posterodistal margin with small spine and notch. Uropod 1 peduncle with long distoventral spine; rami distinctly unequal in length. Uropod 2 peduncle without distoventral spine; rami distinctly unequal in length. Uropod 3 peduncle subequal to the longest ramus; both rami well developed; outer ramus with terminal robust seta. Telson with terminal robust seta on each side.

Female (sexually dimorphic characters). Based on female, 2.4 mm, AM P70635. Gnathopod 2 carpus without distinct free posterior expansion; propodus less than 2.5 x as long as carpus, posterodistal margin with robust seta, with no excavations; dactylus long, distinctly longer than half length of propodus.

Habitat. Among sponges, Halimeda and coral rubble.

Remarks. Latigammaropsis hermes sp. nov. is very similar to L. dionysus sp. nov. but has a reniform eye and longer antenna 2. The male gnathopod 1 is also more slender than in L. dionysus sp. nov.

Distribution. Australia. Queensland: Lizard Island (current study).

Figures

FIGURE 9. Latigammaropsis hermes gen. nov., sp. nov., holotype, male, 2.5 mm, AM P71531, Yonge Reef, Lizard Island, Great Barrier Reef.

FIGURE 10. Latigammaropsis hermes gen. nov., sp. nov., holotype, male, 2.5 mm, AM P71531, female, 2.4 mm, AM P70635, Yonge Reef, Lizard Island, Great Barrier Reef.