Photis aina J. L. Barnard 1970
Creators: name: Myers, Alan A.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Photidae
Photis
Photis aina

description: <i>Photis aina</i> J.L. Barnard, 1970 (Figs 13, 14) <i>Photis aina</i> J.L. Barnard, 1970: 185, figs 121, 122. <i>Photis</i> (<i>Cedrophotis</i>) <i>aina</i>. ––J.L. Barnard, 1991: 225. <b>Material examined.</b> 1 male, 1 female, AM P71406 (QLD 1808); 1 male AM P71419 (QLD 1829); 1 male, 2 females AM P71565 (QLD 1829). <b>Type locality.</b> Off Ewa beach, Oahu, Hawaii (~ 21°18’33”S 158°1’29”E). <b>Description.</b> Based on male, 2.5 mm, AM P71406. <b>Head.</b> <i>Head</i> anteroventral margin strongly recessed, extending behind posterior margin of eye. <i>Eye</i> oval, medium size, about one quarter head length, situated entirely within the lateral lobe. <i>Mandible palp</i> article 3 distinctly shorter than article 2, spatulate, widest subdistally. <i>Antenna 1</i> peduncular article 1 subequal with article 3; flagellum with 8 articles and lacking aesthetascs; accessory flagellum absent. <i>Antenna 2</i> long, about half body length; flagellum distinctly longer than peduncular article 5 with 7 articles. <b>Pereon.</b> <i>Coxae 1-5</i> longer than broad, fringed with very long setae; coxa 1 anterodistal margin weakly produced forward. <i>Gnathopod 1</i> carpus subequal to propodus; propodus less than 1.5 x as long as wide, posterodistal margin evenly rounded. <i>Gnathopod 2</i> 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. <i>Pereopod 3</i> merus with several very long setae on anterior margin; propodus less than 4 x as long as broad. <i>Pereopod 5</i> basis extremely expanded. as long as broad; basis with many long setae along anterior margin. <i>Pereopods 5-7</i> dactyls each with accessory spine on anterior margin. <b>Pleon.</b> <i>Epimeron 3</i> posterodistal margin rounded. <i>Uropod 1</i> peduncle without distoventral spine; rami subequal in length. <i>Uropod 2</i> peduncle without distoventral spine; rami subequal in length. <i>Uropod 3</i> peduncle slender, distinctly longer than outer ramus; inner ramus about half length of outer ramus; outer ramus with terminal fine setae. <i>Telson</i> with terminal blunt robust seta on each side. <b>Female</b> (sexually dimorphic characters). Based on female 2.6 mm, AM P71565 <i>Gnathopod 2</i> carpus a little longer than that of male. <b>Habitat.</b> Among <i>Halimeda opuntia</i>. <b>Remarks.</b> This species is easily recognisable by its setose coxae and relatively long inner ramus of uropod 3. This latter is a plesiomorphic state in <i>Photis</i> and was responsible for this species being placed, with <i>P. malinalco</i> J.L. Barnard, 1967 in a subgenus <i>Cedrophotis</i> by Barnard (1967). Long coxal setae are also found in <i>Dodophotis distinguenda</i> (Ruffo, 1955), but that species has a vestigial inner ramus on uropod 3 and in <i>P. lamellifera</i> 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 <i>P. brevipes</i> Shoemaker, 1942, <i>P. californica</i> Stout, 1913 and <i>P. conchicola</i> Alderman, 1936, but all three species have the male gnathopod 2 with a large spine on the posterodistal margin of the propodus. <b>Distribution.</b> <i>Australia</i>. Queensland: Lizard Island (current study). <i>USA.</i> Hawaii: Oahu (J.L. Barnard 1970)
description: Published as part of <i>Myers, Alan A., 2009, Photidae *, pp. 771-799 in Zootaxa 2260 (1)</i> on pages 788-790, DOI: 10.11646/zootaxa.2260.1.43, http://zenodo.org/record/5306907
description: {"references": ["Barnard, J. L. (1970) Sublittoral Gammaridea (Amphipoda) of the Hawaiian Islands. Smithsonian Contributions to Zoology, 34, 1 - 286.", "Barnard, J. L. &amp; Karaman, G. S. (1991) The families and genera of marine gammaridean Amphipoda (except marine gammaroids). Records of the Australian Museum, Supplement, 13 (1 &amp; 2), 1 - 866.", "Barnard, J. L. (1967) Bathyal and abyssal gammaridean Amphipoda of Cedros Trench, Baja California. Bulletin of the United States National Museum, 260, 1 - 205.", "Ruffo, S. (1955) Etudes sur les crustaces amphipodes XLIII. Une nouvelle espece de Photis de Madgascar (Amphipodes Photidae). Le Naturaliste Malagache, 7, 195 - 200.", "Schellenberg, A. (1928) Report on the Amphipoda. Zoological results of the Cambridge Expedition to Suez Canal, 1924. Transactions of the Zoological Society of London, 22, 633 - 692.", "Shoemaker, C. R. (1942) Amphipod crustaceans collected on the Presidential Cruise of 1938. Smithsonian Miscellaneous Collections, 101, 1 - 52.", "Stout, V. R. (1913) Studies in Laguna Amphipoda. II. Zoologische Jahrbucher. Abteilung fur Systematik, Okologie un Geographie der Tiere, 34, 633 - 659.", "Alderman, A. L. (1936) Some new and little known amphipods of California. University of California Publications in Zoology, 41, 53 - 74."]}