Cymadusa thagaay Peart 2007
Creators: name: Hughes, L. E.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Ampithoidae
Cymadusa
Cymadusa thagaay

description: <i>Cymadusa thagaay</i> Peart, 2007 (Figs 29, 30) <i>Cymadusa thagaay</i> Peart, 2007a: 36, figs 29–32. <b>Material examined.</b> Holotype, male, AM P62518 (QLD 1370); paratype, female, AM P62519 (QLD 1371). <b>Type locality.</b> Mangrove Beach, Lizard Island, Great Barrier Reef, Queensland, Australia (14°40.99’S 145°27.63’E), living on <i>Turbinaria</i> sp. and green algae, 3 m. <b>Description.</b> Based on holotype, male, 4 mm, AM P62518 (QLD 1370). <b>Head.</b> <i>Head</i> as long as deep. <i>Antenna 1</i> longer than antenna 2; peduncular article 1 subequal to article 2; flagellum 25 articles; accessory flagellum with 1 article. <i>Antenna 2</i> peduncle not densely setose on ventral margin; article 4 subequal in length to article 5; flagellum 16 articles. <i>Upper lip</i> directed nearly straight down, lateral margins each with midlateral notch. <i>Mandible</i> molar well developed, triturating, accessory setal row with 5 robust serrate setae; palp 3–articulate, article 3 apically setose; article 1 shorter than article 2; article 2 longer than article 3, slender setae present; article 3 subequal in length to article 1. <i>Lower lip</i> outer plates notched, with deep distal cleft, lateral lobe distinctly longer than medial lobe; mandibular lobe with curved margins, subacute apically. <i>Maxilla 1</i> inner plate with 1 seta; palp article 2 broad. <i>Maxilla 2</i> inner and outer plates subequal in width. <i>Maxilliped</i> outer plate with row of large robust setae along medial margin. <b>Pereon.</b> <i>Coxae 1–4</i> deeper than broad. <i>Gnathopod 1</i> smaller than gnathopod 2; coxa subequal to coxa 2, weakly produced anteriorly, anterior margin straight, anteroventral corner acute, with ventral row of slender setae of varying lengths; basis shorter than coxa, anterodistal lobe rounded, without setae; merus posterodistal lobe subacute; carpus shorter than propodus, anterior margin with slender setae, posterior margin subacute; propodus broad, subovoid; palm acute, sinusoidal, posterodistal corner rounded, with 1 robust seta defining palm; dactylus subequal in length to palm, apically acute, inner margin crenate. <i>Gnathopod 2</i> coxa with ventral row of slender setae of varying lengths; basis with sparse medial slender setae, with rounded anterodistal lobe, with 1 slender seta; merus margin with short, subacute distal lobe; carpus shorter than propodus, subtriangular; propodus broad, less than 1.5 x as long as broad, subovoid, anterior margin with fringe of slender setae; palm acute, concave, with posterodistal corner, subquadrate, with 1 robust seta defining palm; dactylus subequal in length to palm, tapering evenly, apically acute, inner margin crenate. <i>Pereopods 3–4</i> basis narrow; merus subequal in length to carpus. <i>Pereopods 5–7</i> weakly prehensile. <i>Pereopod 5</i> without medial slender setae; distal articles broad; propodus slightly expanded distally, with 2 anterodistal striated robust setae; dactylus strongly curved. <i>Pereopod 6</i> basis posterior margin straight, with a single marginal robust seta; distal articles slender; propodus not expanded distally, with 2 anterodistal striated robust setae; dactylus slightly curved. <i>Pereopod 7</i> similar to pereopod 6. <b>Pleon.</b> <i>Epimera 2–3</i> posteroventral corner broadly rounded. <i>Uropod 1</i> peduncle with 8 robust setae, with long fringe of slender setae (greater than 0.5 x length of peduncle), with large, acute distoventral spine; outer ramus with 3 lateral robust setae; inner ramus with 2 lateral robust setae. <i>Uropod 2</i> peduncle with 3 robust setae; outer ramus with 3 lateral robust setae; inner ramus with 4 lateral robust setae. <i>Uropod 3</i> peduncle longer than broad, more than 2 x length of rami, without marginal slender setae, with 3 distal peduncular robust setae, with 4 distal slender setae; outer ramus with 2 large recurved distal robust setae, without lateral robust or slender setae; inner ramus with 5 distal slender setae and 2 distal robust setae, without lateral robust setae. <i>Telson</i> subrectangular, apically rounded, with small apical cusp on each distolateral corner, with 2 pair of lateral and 3 pairs of apical slender setae. <b>Female</b> (sexually dimorphic characters). Based on paratype, female, 4 mm, AM P62519 (QLD 1371). <i>Gnathopod 1</i> subequal in size to gnathopod 2; merus distal lobe rounded; propodus narrow, subrectangular; palm convex. <i>Gnathopod 2</i> palm sinusoidal, with posterodistal tooth, short, apically subacute. <b>Habitat.</b> Red, green and brown algae, <i>Turbinaria</i> sp. and <i>Sargassum</i> sp. <b>Remarks.</b> See remarks for <i>Cymadusa heronensis.</i> <b>Distribution.</b> <i>Australia</i>. Queensland: Lizard Island (Peart 2007a).
description: Published as part of <i>Hughes, L. E. &amp; Lowry, J. K., 2009, Ampithoidae *, pp. 153-219 in Zootaxa 2260 (1)</i> on pages 201-204, DOI: 10.11646/zootaxa.2260.1.8, http://zenodo.org/record/5322208
description: {"references": ["Peart, R. A. (2007 a) A review of Australian Cymadusa (Crustacea: Amphipoda: Ampithoidae) with descriptions of eight new species. Zootaxa, 1540, 1 - 53."]}