Latigammaropsis dionysus Myers 2009, sp. nov.
Creators: name: Myers, Alan A.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Photidae
Latigammaropsis
Latigammaropsis dionysus

description: <i>Latigammaropsis dionysus</i> sp. nov. (Figs 7, 8) <b>Type material.</b> Holotype, male, 3.0 mm, AM P 70966, 200 m north of Bird Islet, Lizard Island (14°41’28”S 145°27’53”E), mixed coralline algae &amp; epiphytes from shallow reef flat, 2.6 m, R. T. Springthorpe, 26 February 2005 (QLD 1687). Paratypes: 4 males, 8 females, 1 juvenile, AM P75458, same data as holotype. <b>Additional material examined.</b> 1 male, 2 females, AM P70786 (QLD 1668); 2 males, 2 females, AM P70984 (QLD 1693); 1 male, 1 female, AM P71327 (QLD 1783); 5 males, 8 females, 4 juveniles, AM P71552 (QLD 1823); 2 males, 3 females, AM P71571 (QLD 1823); 1 male, 2 females, AM P71574 (QLD 1829). <b>Type locality.</b> 200 m north of Bird Islet, Lizard island, Queensland, Australia (14°41’28”S 145°27’53”E). <b>Etymology.</b> Greek mythology: <i>Dionysus</i>, the God of wine. <b>Description.</b> Based on holotype, male, 3.0 mm, AM P70966. <b>Head.</b> <i>Head</i> lateral cephalic lobes rounded, anteroventral margin strongly recessed, extending behind posterior margin of eye. <i>Eye</i> round, large (1/4 or more of head length), partially situated within the lateral lobe. <i>Labrum</i> epistome absent. <i>Mandible palp</i> article 3 distinctly shorter than article 2; spatulate, widest subdistally. <i>Antenna 1</i> peduncular article 1 a little longer than article 3; flagellum with 9 articles; accessory flagellum distinct and multiarticulate. <i>Antenna 2</i> short, distinctly less than 1/2 body length; flagellum distinctly longer than peduncular article 5, with 6 articles. <b>Pereon.</b> <i>Coxae 1–2</i> without spines on distal margin. <i>Coxa 1</i> not distally acute. <i>Gnathopod 1</i> distinctly different in size from gnathopod 2; carpus anterior margin with fine setae only, subequal in length to propodus; propodus between 1.5 and 3 x as long as wide, posterodistal margin evenly rounded. <i>Gnathopod 2</i> basis anterior margin with few setae; carpus with distinct free posterior expansion; propodus very long, 4 x as long as carpus, posterodistal margin with robust seta, and with a single excavation; dactylus short, distinctly half or less than half length of propodus. <i>Pereopod 3</i> merus with few setae on anterior margin. <i>Pereopods 5–7</i> basis with few setae. <i>Pereopod 5</i> basis extremely expanded, as long as broad. <b>Pleon.</b> <i>Urosomites 1–2</i> without dorsolateral spines. <i>Epimeron 3</i> posterodistal margin rounded. <i>Uropod 1</i> peduncle with short distoventral spine; rami distinctly unequal in length. <i>Uropod 2</i> peduncle without distoventral spine; rami subequal in length. <i>Uropod 3</i> biramous; peduncle subequal to the longest ramus; both rami well developed; outer ramus with terminal fine setae. <i>Telson</i> with terminal robust seta on each side. <b>Female</b> (sexually dimorphic characters). Based on paratype female 3.1 mm, AM P75458. <i>Gnathopod 2</i> propodus less than 2.5 x length of carpus, palm without distinct excavation. <b>Habitat.</b> Coralline algae and rubble. <b>Remarks.</b> <i>Latigammaropsis dionysus</i> <b>sp. nov.</b> resembles <i>L. afra</i> (Stebbing, 1888), but has a round eye, whereas in <i>L. afra</i> it is reniform. It also differs markedly from <i>L. afra</i> in the weakly acute palm of the male gnathopod 2. It is more similar to material described by J.L. Barnard (1970) from Hawaii under the name <i>Gammaropsis afra</i>. In Hawaiian material, however, the male gnathopod 2 palm is convoluted whereas in present material the palm is almost straight. This species differs from <i>L. athenae</i> in lacking long setae on the male gnathopod 2. It is very similar to <i>L. hermes</i> <b>sp. nov.</b> (see remarks section for that species). <b>Distribution</b>. <i>Australia</i>. Queensland: Lizard Island (current study).
description: Published as part of <i>Myers, Alan A., 2009, Photidae *, pp. 771-799 in Zootaxa 2260 (1)</i> on pages 780-781, DOI: 10.11646/zootaxa.2260.1.43, http://zenodo.org/record/5306907
description: {"references": ["Stebbing, T. R. R. (1888) Report on the Amphipoda collected by H. M. S. Challenger during the years 1873 - 1876. Report on the Scientific Results of the Voyage of H. M. S. Challenger during the years 1873 - 76, Zoology 29, 1 - 1737, pls 1 - 210.", "Barnard, J. L. (1970) Sublittoral Gammaridea (Amphipoda) of the Hawaiian Islands. Smithsonian Contributions to Zoology, 34, 1 - 286."]}