Photidae * Author Myers, Alan A. text Zootaxa 2009 2009-10-08 2260 1 771 799 https://www.biotaxa.org/Zootaxa/article/view/zootaxa.2260.1.43 journal article 10.11646/zootaxa.2260.1.43 1175-5326 5306907 Photis aina J.L. Barnard, 1970 ( Figs 13 , 14 ) Photis aina J.L. Barnard, 1970: 185 , figs 121, 122. Photis ( Cedrophotis ) aina . ––J.L. Barnard, 1991: 225 . Material examined. 1 male , 1 female , AM P71406 ( QLD 1808 ) ; 1 male AM P71419 ( QLD 1829 ) ; 1 male , 2 females AM P71565 ( QLD 1829 ) . FIGURE 13. Photis aina Barnard, 1970 , male, 2.5 mm, AM P71406, Yonge Reef, Lizard Island, Great Barrier Reef. FIGURE 14. Photis aina Barnard, 1970 , male, 2.5 mm, female 2.6 mm, AM P71406, Yonge Reef, Lizard Island, Great Barrier Reef. Type locality. Off Ewa beach, Oahu , Hawaii (~ 21°18’33”S 158°1’29”E ) . Description. Based on male, 2.5 mm , AM P71406. Head. Head anteroventral margin strongly recessed, extending behind posterior margin of eye. Eye oval, medium size, about one quarter head length, situated entirely within the lateral lobe. Mandible palp article 3 distinctly shorter than article 2, spatulate, widest subdistally. Antenna 1 peduncular article 1 subequal with article 3; flagellum with 8 articles and lacking aesthetascs; accessory flagellum absent. Antenna 2 long, about half body length; flagellum distinctly longer than peduncular article 5 with 7 articles. Pereon. Coxae 1-5 longer than broad, fringed with very long setae; coxa 1 anterodistal margin weakly produced forward. Gnathopod 1 carpus subequal to propodus; propodus less than 1.5 x as long as wide, posterodistal margin evenly rounded. Gnathopod 2 basis anterior margin lacking long setae; carpus with distinct free posterior expansion; propodus over twice length of carpus, posterodistal margin with robust seta, palm with multiple excavations; dactylus long, more than half length of propodus. Pereopod 3 merus with several very long setae on anterior margin; propodus less than 4 x as long as broad. Pereopod 5 basis extremely expanded. as long as broad; basis with many long setae along anterior margin. Pereopods 5-7 dactyls each with accessory spine on anterior margin. Pleon. Epimeron 3 posterodistal margin rounded. Uropod 1 peduncle without distoventral spine; rami subequal in length. Uropod 2 peduncle without distoventral spine; rami subequal in length. Uropod 3 peduncle slender, distinctly longer than outer ramus; inner ramus about half length of outer ramus; outer ramus with terminal fine setae. Telson with terminal blunt robust seta on each side. Female (sexually dimorphic characters). Based on female 2.6 mm , AM P71565 Gnathopod 2 carpus a little longer than that of male. Habitat. Among Halimeda opuntia . Remarks. This species is easily recognisable by its setose coxae and relatively long inner ramus of uropod 3. This latter is a plesiomorphic state in Photis and was responsible for this species being placed, with P. malinalco J.L. Barnard, 1967 in a subgenus Cedrophotis by Barnard (1967) . Long coxal setae are also found in Dodophotis distinguenda ( Ruffo, 1955 ) , but that species has a vestigial inner ramus on uropod 3 and in P. lamellifera Schellenberg, 1928 , from which it differs in the longer carpus of gnathopod 1, as well as by its longer uropod 3 inner ramus. Long coxal setae are found also in the Californian species P. brevipes Shoemaker, 1942 , P. californica Stout, 1913 and P. conchicola Alderman, 1936 , but all three species have the male gnathopod 2 with a large spine on the posterodistal margin of the propodus. Distribution. Australia . Queensland : Lizard Island (current study). USA . Hawaii : Oahu (J.L. Barnard 1970 )