Ampithoe roly Peart 2007, sp. nov.
Creators: name: Peart, Rachael A.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Ampithoidae
Ampithoe
Ampithoe roly

description: <i>Ampithoe roly</i> sp. nov. (Figs 58–61) <b>Type Material</b>. Holotype: WAM C38542, male, 5 mm, W side of Malus Island, Dampier Archipelago, WA, 26°30.612’S 116°38.918’E, 27 Aug 1999, 2.3 m, on fine <i>Sargassum</i> sp. on sand, R. A. Peart. Paratypes: WAM C38543, female, 5 mm, type locality; AM P61887, 1 specimen, Tish Point, Rosemary Island, Dampier Archipelago, WA, 20°29.671’S 116°35.894’E, 30 Aug 1999, 0.5 m, on <i>Dictyota</i> sp., R. Peart; AM P61888, 12 specimens, S side of Kendrew Island, Dampier Archipelago, WA, 20°28.987’S 116°32.549’E, 30 Aug 1999, 4 m, on brown algae, R. Peart; AM P61889, 1 specimen, south side of Kendrew Island, Dampier Archipelago, WA, 20°28.987’S 116°32.549’E, 30 Aug 1999, 4.5 m, on <i>Sargassum</i> sp., R. Peart; AM P61890, 2 specimens, Roly Rock, Dampier Archipelago, WA, 20°29.741’S 116°30.184’E, 1 Sep 1999, 16 m, under rocks, M. Hewitt. <b>Diagnosis</b>. Antenna 2 slender, similar to antenna 1, not densely setose on ventral margin. Lower lip with lateral lobe longer than medial lobe. Maxilla 1 inner plate with 1 slender seta. Gnathopod 1 carpal lobe subacute; carpus shorter than propodus; palm convex, with midmedial tooth, without posterodistal tooth defining palm; dactylus subequal in length to palm. Gnathopod 2 without densely setose margins; basis posterodistal lobe large and rounded, with more than 3 robust seta; carpus much shorter than propodus; palm transverse, entire, with a subacute midmedial tooth, with a small subacute posterodistal tooth defining palm, with 1 defining robust seta; dactylus subequal in length to palm. Pereopod 3 basis narrow; merus narrow. Pereopods 5–7 simple or weakly prehensile. Uropod 3 peduncle with 5 distal robust setae, outer ramus subequal in length to inner ramus, with patch of small conical lateral denticles, without lateral setal fringe; inner ramus with 3 distal robust setae. Telson distally truncate, apical cusps expanded to form large hooks. <b>Description</b>. Based on holotype, male, 5 mm, WAM C38542. <i>Head</i> as long as deep. <i>Antenna 1</i> longer than antenna 2; peduncular article 1 subequal to article 2 (0.95 x), article 2 longer than article 3 (3.23 x), article 3 shorter than article 1 (0.33 x); primary flagellum with 24 articles. <i>Antenna 2</i> peduncular article 4 subequal to article 5; flagellum 15 articulate. <i>Mandible</i> molar with 4 robust setae in accessory setal row; palp slender, long, setose along posterior margin, article 1 shorter than article 2 (0.36 x), article 2 subequal to article 3 (1.05 x), article 3 longer than article 1 (2.68 x). <i>Lower lip</i> mandibular lobe with curved margins, rounded apically. <i>Maxilla 1</i> palp with apical robust setae. <i>Maxilla 2</i> inner plate narrow, outer plate broader. <i>Maxilliped</i> outer plate with developed setation (robust setae large). <i>Pereon</i>. <i>Gnathopod 1</i> without densely setose margins; coxa smaller than gnathopod 2 coxa, produced distoventrally, distoventral margin rounded, anterior margin concave, ventral margin with a row of small setules; basis subequal to coxa, with sparse (sometimes plumose) slender setae, posterodistal lobe large and round, 2 or 3 robust setae; merus produced to form a small, subacute distoventral lobe, anterior margin with setae absent; carpus longer than merus, subtriangular, anterior margin with 1 robust seta and slender setae; propodus narrow (length 1.79 x width), subrectangular; palm with 1 defining robust seta; dactylus inner margin denticulate. <i>Gnathopod 2</i> without densely setose margins; coxa ventral margin with a row of small setules; basis longer than coxa, with fringe of long, slender, plumose setae; merus produced to form a short, subacute distoventral lobe, anterior margin with setae absent; carpus subequal to merus, subtriangular, anterior margin with more than 4 robust setae, much shorter than propodus (0.37 x); propodus broad (length 1.09 x width), subrectangular, produced into an anterodistally setose lobe; dactylus tapering evenly, acute, inner margin denticulate. <i>Pereopod 7</i> basis without marginal robust setae, without medial slender setae; propodus defined distally by 3–5 simple robust setae. <i>Pleon</i>. <i>Epimeron 3</i> posteroventral corner narrowly rounded. <i>Uropod 1</i> peduncle with more than 5 robust setae, with a long setal fringe; inner ramus slightly longer than outer ramus, with 3–5 marginal robust setae, slender setae absent; outer ramus with more than 5 marginal robust setae, slender setae absent. <i>Uropod 2</i> peduncle with 1 or 2 robust setae, setal fringe absent; inner ramus slightly longer than outer ramus, with 3–5 marginal robust setae, slender setae absent; outer ramus with more than 5 marginal robust setae, slender setae absent. <i>Uropod 3</i> peduncle longer than broad (1.67 x width), short with respect to rami length (1.86 x), marginal robust setae absent, marginal slender setae absent, with more than 5 distal slender setae; inner ramus with 3–5 distal slender setae. <i>Telson</i> with lateral slender setae. <b>Female.</b> (sexually dimorphic characters). Based on paratype, female, 5 mm, WAM C38543. <i>Antenna 1</i> primary flagellum with 19-articulate. <i>Antenna 2</i> flagellum 11-articulate. <i>Gnathopod 1</i> subequal in size to gnathopod 2; coxa subequal in size to gnathopod 2 coxa; basis shorter than coxa, posterodistal lobe small and round, with 2 or 3 slender setae; merus produced to form a short, rounded distoventral lobe; carpal lobe truncated; palm without midmedial tooth. <i>Gnathopod 2</i> basis shorter than coxa, with sparse (sometimes plumose) slender setae, posterodistal lobe small and round, with 2 or 3 slender setae; carpus longer than merus, shorter than propodus (0.69 x), anterior margin with slender setae only; propodus ovoid, not produced anterodistally; palm acute, without a midmedial tooth. <b>Etymology</b>. This species name is derived from Roly Rock, near the type locality. <b>Remarks</b>. <i>Ampithoe roly</i> <b>sp. nov.</b>, with a strongly subrectangular propodus of gnathopod 2, most closely resembles <i>A. hyalos</i> <b>sp. nov.</b> Characters distinguishing <i>A. roly</i> from <i>A. hyalos</i> are outlined under the account of the latter. <b>Habitat</b>. Brown algae; 0.5–16 m. <b>Distribution</b>. Dampier Archipelago, Western Australia, Australia.
description: Published as part of <i>Peart, Rachael A., 2007, A review of the Australian species of Ampithoe Leach, 1814 (Crustacea: Amphipoda: Ampithoidae) with descriptions of seventeen new species, pp. 1-95 in Zootaxa 1566 (1)</i> on pages 74-77, DOI: 10.11646/zootaxa.1566.1.1, http://zenodo.org/record/5096061