Arcitalitrus bassianus Friend 1987
Creators: name: R Peart
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Arcitalitridae
Arcitalitrus
Arcitalitrus bassianus

description: <i>Arcitalitrus bassianus</i> Friend <i>Talitrus sylvaticus</i>.– Chevreux, 1901: 392, fig. 7. <i>Arcitalitrus bassianus</i> Friend, 1987: 35, figs 30–35. <b>Type material</b>. HOLOTYPE, &amp;female; AM P37350, 10 February 1979, J.A. Friend. PARATYPES, male AM P37351; 3&amp;female;&amp;female;, 1 juvenile AM P37352; 13, 2&amp;female;&amp;female;, 1 juvenile BMNH; 13, 2&amp;female;&amp;female;, 1 juvenile NMC. Paratypes are all from type locality. <b>Type locality</b>. 1.5 km NNE of Kate’s Point, Robbins Island, northwestern Tasmania (40°40'S 144°55'E), in swampy area beside creek. <b>Description</b>. <i>Body</i> shape 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. <i>Maxilliped outer plate distally acute/arcuate</i>; 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 “mittenlike”; 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> basis posterodistal lobe present. <i>Gill 2</i> lobate, not incised. <i>Gills 3–5</i> lobate, smaller than gills 2 and 6. <i>Gill 6</i> lobate, anterior margin convoluted, <i> <i>subapically incised along posterior margin</i>. Oostegites</i> long (length greater than 2× width), weakly setose, setae with simple smooth tips. <i>Epimera 1 to 3</i> not convergent. <i>Epimeron 2</i> longer than epimeron 3. <b> <i>Epimeron 3</i> posteroventral margin <i>serrulate</i></b> , posteroventral corner subquadrate. <i>Pleopod 1</i> well developed, biramous, rami subequal in length to peduncle; inner ramus with 5 articles; outer ramus with 9 articles. <i>Pleopod 2 reduced</i>, biramous, rami shorter than peduncle; inner ramus with 4 articles, inner ramus with 1–5 articles; outer ramus with 6 articles. <i>Pleopod 3</i> reduced, biramous, rami shorter than peduncle; inner ramus with 2 articles; outer ramus with 5 articles. <i>Uropod 1</i> not sexually dimorphic; peduncle with 3 robust setae on peduncle; inner ramus subequal in length to outer ramus, with 3 robust setae on the margins, with 3 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, 5 apical robust setae; outer ramus without marginal robust setae, with 2 apical robust setae. <i>Uropod 3</i> peduncle with 1 robust seta; ramus shorter than peduncle, ramus linear (narrowing), with 2 robust setae. <i>Telson</i> as broad as long, apically incised, with marginal and apical robust setae, with 3–5 robust setae per lobe. <b>Habitat</b>. Leaf and log litter, in bracken, under stones, swampy ground, wet sclerophyll, eucalyptus regrowth. <b>Remarks</b>. <i>Arcitalitrus bassianus</i> is a member of the “Sylvaticus” species group and is the only Australian landhopper found on both mainland Australia and Tasmania. It differs from other species in the group in having a long epimeron 2, a subquadrate corner on epimeron 3, reduced numbers of articles on the inner ramus of pleopod 2 and a biramous pleopod 3. It is similar to <i>Ar. belbucca</i> and <i>Ar. nana</i> in having 6–10 articles on the outer ramus of pleopod 2. <i>Arcitalitrus bassianus</i> and <i>Ar. sylvaticus</i> both have subequal rami on uropod 1 and an apically incised telson. <b>Distribution</b>. Tasmania: Teatree swamp near Togari; King and Robbins Islands (Friend, 1987). Victoria: Mount Donna Buang; Marysville; Cement Creek; Nelson; Lake Purrumbete; Snobs Creek (Friend, 1987).
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 pages 98-99
description: {"references": ["Chevreux, E., 1901. Crustaces Amphipodes. Mission scientifique de M. Ch. Alluaud aux Iles Seychelles (mars, avril, mai 1892). Memoires de la Societe Zoologique de France 14: 388 - 438.", "Friend, A., 1987. The terrestrial amphipods (Amphipoda: Talitridae) of Tasmania: systematics and zoogeography. Records of the Australian Museum, Supplement 7: 1 - 85."]}