Cymadusa hoeyae Hughes &amp; Lowry 2009, sp. nov.
Creators: name: Hughes, L. E.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Ampithoidae
Cymadusa
Cymadusa hoeyae

description: <i>Cymadusa hoeyae</i> Hughes &amp; Lowry sp. nov. (Figs 17, 18) <b>Type material.</b> Holotype, male, 7.5 mm, 1 slide, AM P76761. Paratype, female, 4 unsexed, AM P71037, Picnic Beach, Palfrey Island, near Lizard Island (14°41.69’S 145°26.89’E), algal mat and fine sediment from rubble bottom, reef flat, 3 m, S. LeCroy, 27 February 2005 (QLD 1708). <b>Additional material examined.</b> 1 dissected male, AM P76764 (QLD 1704); 1 dissected female, AM P76763 (QLD 1704); 1 unsexed, AM P76765 (QLD 1704); 1 unsexed, AM P76766 (QLD 1730); 5 unsexed, AM P76762 (QLD 1757). <b>Type locality.</b> Picnic Beach, Palfrey Island, near Lizard Island, Queensland, Australia (14°41.69’S 145°26.89’E), living on the reef flat in algal mats and fine sediment from rubble bottoms, 3 m. <b>Etymology.</b> Named for Jessica Hoey (GBRMPA), in appreciation for her help in the organisation of our collecting permits for the GBR project. <b>Description.</b> Based on holotype, male, 7.5 mm, AM P76761. <b>Head.</b> <i>Antenna 1</i> shorter than antenna 2; peduncular article 1 subequal to article 2; flagellum 19 articles; accessory flagellum with 1 article. <i>Upper lip</i> lateral margins each with midlateral notch. <i>Mandible</i> molar well developed, triturating, accessory setal row with 8 serrate setae; palp 3–articulate, article 3 apically setose; article 1 shorter than article 2; article 2 shorter than article 3; article 3 longer than article 1. <i>Lower lip</i> outer plates notched, forming medial excavation, lateral lobe distinctly longer than medial lobe; mandibular lobe with curved margins, rounded apically. <i>Maxilla 1</i> inner plate with 3 setae; palp article 2 broad. <i>Maxilla 2</i> inner plate narrower than outer plate. <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> longer than gnathopod 2; coxa distinctly larger than coxa 2, produced, anterior margin straight, anteroventral corner rounded, with a tuft of long or short slender setae in the posteroventral corner; basis longer than coxa, anterodistal lobe absent, with 1 slender seta; merus posterodistal lobe subacute; carpus about 3 x as long as broad, longer and more narrow than propodus, anterior margin without setae, posterior margin straight; propodus broad, subovoid; palm acute, convex, with rounded posterodistal corner, with 1 robust seta defining palm; dactylus subequal in length to palm, inner margin crenate. <i>Gnathopod 2</i>, coxa with a tuft of slender setae in the posteroventral corner; basis with sparse slender setae, anterodistal corner without setae; merus margin with short, subacute anterodistal lobe; carpus shorter than propodus, cup-shaped; propodus broad, less than 1.5 x as long as broad, subrectangular, not produced into an anterodistally setose lobe; palm acute, sinusoidal, 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> simple. <i>Pereopod 5</i> without medial slender setae; distal articles slender; propodus not expanded distally, without anterodistal striated robust setae; dactylus strongly curved. <i>Pereopod 6</i> basis posterior margin straight, with several marginal robust setae; distal articles slender; propodus not expanded distally, without anterodistal striated robust setae; dactylus strongly curved. <i>Pereopod 7</i> similar to pereopod 6. <b>Pleon.</b> <i>Epimera 2–3</i> posteroventral corner with small acute cusp. <i>Uropod 1</i> peduncle with 8 robust setae, without fringe of long slender setae, with large, acute distoventral spine (half the length of outer ramus); outer ramus length about 5–6 x as long as broad, with 9 lateral robust setae; inner ramus with 9 marginal robust setae;. <i>Uropod 2</i> peduncle with 4 robust setae; outer ramus with 7 lateral robust setae; inner ramus with 9 lateral robust setae. <i>Uropod 3</i> peduncle longer than broad, less than 2 x length of rami, without marginal slender setae, with 5 distal robust and 2 distal slender setae; outer ramus with 2 large recurved distal robust setae, with 1 lateral robust seta and 3 lateral slender setae; inner ramus with 3 distal slender setae, with 1 lateral robust seta. <i>Telson</i> subtrapezoidal, apically rounded, with small apical cusp on each distolateral corner, with 2 oblique medial slender setae, with 1 pair of lateral setae, and with 2 pair of lateral and 1 pair of apical plumose setae. <b>Habitat.</b> Algal mat and fine sediment from rubble bottom. <b>Remarks.</b> <i>Cymadusa hoeyae</i> <b>sp. nov.</b> belongs to a group of six species with an elongate rectolinear carpus on gnathopod 1 of males and includes: <i>C. brevidactyla</i> (Chevreux, 1907); <i>C. cavimana</i> (Sivaprakasam, 1971); <i>C. filosa</i> Savigny, 1816; <i>C. khbarnardi</i> <b>sp. nov.</b> and <i>C. setosa</i> (Haswell, 1879). <i>Cymadusa filosa</i> and <i>C. setosa</i> are distinguished from other members of the group by the densely plumose setae of their gnathopods and from <i>Cymadusa brevidactyla</i>, <i>C. cavimana</i> and <i>C. khbarnardi</i> <b>sp. nov.</b> by the large excavation on the palm of the male gnathopod 2. The sinusoidal palm of the male gnathopod 2 and lack of dense plumose setae along the margins of the gnathopods distinguishes <i>Cymadusa hoeyae</i> from these and all other GBR species. <b>Distribution.</b> <i>Australia</i>. Queensland: Lizard Island (current study).
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 181-184, DOI: 10.11646/zootaxa.2260.1.8, http://zenodo.org/record/5322208
description: {"references": ["Chevreux, E. (1907) Diagnoses d'amphipodes nouveaux recueillis dans les possessions francaises de l'Oceanie par M. L. Seurat, directeur du laboratoire de recherches biologiques de Rikitea. Bulletin du Museum d'Histoire Naturelle, Paris, 1907, 412 - 417.", "Sivaprakasam, T. E. (1971) Amphipods of the family Ampithoidae from the Madras Coast. Journal of the Marine Biological Association of India, 12 (1 / 2), 64 - 80.", "Savigny, J. - C. (1816) Observations generales sur la bouche des arachnidesdes crustaces et des entomostraces. pp. 39 - 117 in Memories sur les Animaux sans Vertebres, Premiere partie. Deterville, Paris", "Haswell, W. A. (1879) On Australian Amphipoda. Proceedings of the Linnean Society of New South Wales, 4 (3), 245 - 79, pls 7 - 12."]}