Arcitalitrus belbucca R Peart 2006, n.sp.
Creators: name: R Peart
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Arcitalitridae
Arcitalitrus
Arcitalitrus belbucca

description: <i>Arcitalitrus belbucca</i> n.sp. Figs. 1, 8–10 <b>Type material</b>. HOLOTYPE, &amp;female;, 14.0 mm, AM P60959, 11 November 1999, M. Gray, G. Milledge and H. Smith. PARATYPES, 65 specimens AM P60967. Paratypes are all from the type locality. <b>Type locality</b>. Belbucca Road, 1.5 km from junction with Middle Ridge Road, Irishman State Forest (30°32'58"S 152°40'14"E), west of Sydney, New South Wales, Australia. <b>Description</b>. Based on holotype female. <i>Body shape</i> normally laterally compressed; cuticle calcification absent. <i>Eye</i> medium (<b> 1</b> ⁄ <b> 5 – 1</b> ⁄ <b> 3</b> head length). <i>Antenna 2</i> longer than head and first 3 pereonites; peduncular articles narrow. <i>Mandible</i> left lacinia mobilis 4 dentate, or 5 dentate. <i>Maxilliped</i> outer plate distally acute/arcuate; palp dactylus present and distinct. <i>Pereonite 1</i> sternite without papillose process. <i>Gnathopod 1</i> not sexually dimorphic; simple; merus and carpus not expanded; propodus subrectangular; palm absent; dactylus longer than palm. <i>Gnathopod 2</i> not sexually dimorphic; chelate; basis narrow; merus and carpus expanded posteriorly; propodus “mitten-like”; palm obtuse; smooth; dactylus shorter than palm. <i>Pereopods 3–7</i> long (½ length of body); simplidactylate. <i>Pereopod 4</i> carpus similar in length to pereopod 3 carpus, dactylus similar to pereopod 3 dactylus. <i>Pereopod 7</i> posterodistal lobe present. Gill 2 lobate, not incised. <i>Gills 3–5</i> lobate, smaller than gills 2 and 6. <i>Gill 6</i> lobate, anterior margin convoluted, subapically incised along posterior margin. <i>Oostegites</i> long (length greater than 2× width), <i>weakly setose</i>, setae with simple smooth tips. <i>Epimera 1 to 3</i> not convergent. <i>Epimeron 2</i> subequal in length to epimeron 3. <i>Epimeron 3</i> posteroventral margin smooth, posteroventral corner with small subacute tooth. <i>Pleopod 1</i> well developed, biramous, rami subequal in length to peduncle; inner ramus with 13 articles; outer ramus with 9 articles. <i>Pleopod 2</i> well developed, biramous, <i>rami subequal in length to peduncle</i>; inner ramus with 8 articles; outer ramus with 7 articles. <i>Pleopod 3</i> reduced, rami absent. <i>Uropod 1</i> not sexually dimorphic; peduncle with 8 robust setae on peduncle; inner ramus shorter than outer ramus, with 3 robust setae on the margins, with 5 apical robust setae; outer ramus without marginal robust setae, with 3 apical robust setae. <i>Uropod 2</i> not sexually dimorphic; peduncle with 3 robust setae; inner ramus subequal in length to outer ramus, with 2 marginal robust setae, 4 apical robust setae; outer ramus without marginal robust setae, with 4 apical robust setae. <i>Uropod 3</i> peduncle with 1 robust setae; ramus shorter than peduncle, ramus linear (narrowing), with 2 robust setae. <i>Telson</i> longer than broad, <i>deeply incised</i>, with marginal and apical robust setae, with more than 10 robust setae on whole telson. <b>Etymology</b>. Named after Belbucca Road, in Irishman State Forest, the type locality and treated as a noun in apposition. <b>Remarks</b>. <i>Arcitalitrus belbucca</i> is a member of the “Sylvaticus” species group. It is the only <i>Arcitalitrus</i> with a deeply incised telson. <i>Arcitalitrus belbucca</i> and <i>Ar. nana</i> appear to be sister taxa. They share many characters and both have more than 10 dorsal robust setae on the telson. <b>Distribution</b>. New South Wales: Irishman State Forest, west of Sydney.
description: Published as part of <i>R Peart, 2006, The Amphipod Genus Arcitalitrus (Crustacea: Amphipoda: Talitridae) of New South Wales Forests, With Descriptions of Six New Species, pp. 97-118 in Records of the Australian Museum 58</i> on page 99