Vallorchestia dispar
Creators: name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Talitridae
Vallorchestia
Vallorchestia dispar

description: <i>Vallorchestia dispar</i> (Dana, 1852) (Figs 11–14) <i>Orchestia dispar</i> Dana, 1852: 204.— Dana, 1853: 878, pl. 59, fig. 6a–m.— Lowry &amp; Stoddart, 2003: 272.— Lowry &amp; Springthorpe, 2009: 902. <i>Orchestia gammarellus</i>.— Stebbing, 1906: 532 (in part). <b>Types.</b> Neotype, male, 14 mm, AM P.85737, north of lagoon, Valla Beach, New South Wales, Australia (30°35'S 153°00'E), under leaves and debris, J. Peart &amp; R. Peart, 10 January 2002. Original types lost according to Springthorpe &amp; Lowry 1994. <b>Additional material examined.</b> 1 female, AM P.87938, same data as neotype; 10 specimens, AM P.85736, Valla Park Beach, north of Nambucca Heads, New South Wales (30°35'S 153°00'E), under <i>Zostera</i>, supralittoral, western shore of the lagoon, near mouth, S. Keable &amp; D. Townsend; 1 specimen, AM P.85730, north of lagoon, Valla Beach, New South Wales, Australia (30°35’S 153°00’E), damp sand, J. Peart &amp; R. Peart, 10 January 2002; 1 specimen, AM P.85731, north of lagoon, Valla Beach, New South Wales, Australia (30°35’S 153°00’E), damp sand, J. Peart &amp; R. Peart, 10 January 2002; 15 specimens, AM P.85732, north of lagoon, Valla Beach, New South Wales, Australia (30°35’S 153°00’E), damp sand, J. Peart &amp; R. Peart, 10 January 2002; 1 specimen, AM P.85734, north of lagoon, Valla Beach, New South Wales, Australia (30°35’S 153°00’E), under leaves and detritus, J. Peart &amp; R. Peart, 10 January 2002; 22 specimens, AM P.85735, north of lagoon, Valla Beach, New South Wales, Australia (30°35’S 153°00’E), under leaves and detritus, J. Peart &amp; R. Peart, 10 January 2002; 15 specimens, AM P.85741, western shore of lagoon, Valla Beach, New South Wales, Australia (30°35’S 153°00’E), under littoral <i>Zostera</i> wrack, S. Keable &amp; D. Townsend; 9 males, many females (3 are ovigerous) and juveniles, AM P.87936, Macleay River estuary at Stuarts Point Reserve, New South Wales, Australia (30.82209°S 152.99393°E), supralittoral, flat beach, talitrids living in heavy <i>Zostera</i> debris in estuary inland from beach, J.K. Lowry, J. Dermand &amp; K. Engelberg, 11 February 2010 (MI NSW 3666); 8 specimens, AM P.85742, UNSW field station, Smiths Lake, New South Wales, Australia (32°35'S 152°29'E), sandy shore, under drift seaweed on sand, A. Poore, 30 September 2003. <b>Type locality.</b> Valla Beach, New South Wales, Australia (30°35’S 153°00’E). <b>Description.</b> Based on neotype male, 14 mm, AM P.85737. <b>Head</b>. <i>Eye</i> medium (1/5–1/3 head length). <i>Antenna 1</i> short, rarely longer than article 4 of antenna 2 peduncle. <i>Antenna 2</i> up to half body length; peduncular articles slightly expanded. <i>Mandible</i> left lacinia mobilis 4-dentate. <i>Maxilliped</i> palp article 2 distomedial lobe well developed, 4 reduced, button-shaped. <b>Pereon</b>. <i>Gnathopod 1</i> subchelate; coxa smaller than coxa 2, subtriangular, about as broad as deep; posterior margin of carpus and propodus each with lobe covered in palmate setae; propodus subtriangular with well developed posterodistal lobe; palm transverse; dactylus shorter than palm. <i>Gnathopod 2</i> subchelate; coxa similar in size to coxa 3, broader than deep; coxal gill simple (or slightly lobate); basis slightly expanded; posterior margin of merus, carpus and propodus each without lobe covered in palmate setae; carpus triangular, reduced (enclosed by merus and propodus), posterior lobe absent, not projecting between merus and propodus; palm acute, smooth, posterodistal corner with groove; dactylus longer than palm, attenuated distally; gill simple, gill not incised. <i>Pereopods 2–4</i> coxae wider than deep. <i>Pereopods 3–5</i> gills simple; subequal in size to gills 2 and 6. <i>Pereopods 3–7</i> cuspidactylate. <i>Pereopod 4</i> subequal or slightly shorter than pereopod 3; carpus significantly shorter than carpus of pereopod 3; dactylus thickened and pinched posteriorly (different to pereopod 3 dactylus). <i>Pereopod 5</i> propodus distinctly longer than carpus. <i>Pereopods</i> 6–7 medial surface of merus and carpus with velcro setae. <i>Pereopod 6</i> subequal in length to pereopod 7; posterior lobe inner view posteroventral corner subquadrate, posterior lobe with 5 or more marginal setae; coxal gill simple, coxal not incised; merus and carpus with T-setae. <i>Pereopod 7</i> sexually dimorphic; posterodistal lobe present, shallow, broadly rounded; distal articles (merus and carpus) expanded; merus posterior margin evenly rounded; carpus subovate. <b>Pleon</b>. <i>Pleopods</i> all well developed. <i>Pleopod 1</i> peduncle with marginal robust setae; biramous, outer ramus subequal in length to peduncle; inner ramus with 11 articles; outer ramus with 12 articles. <i>Pleopod 2</i> biramous, outer ramus subequal in length to peduncle; inner ramus with 11 articles; outer ramus with 14 articles. <i>Pleopod 3</i> biramous, outer ramus subequal in length to peduncle; inner ramus with 10 articles; outer ramus with 12 articles. <i>Epimeron 2</i> subequal in length to epimeron 3. <i>Epimeron 3</i> posterior margin smooth, posteroventral corner with small subacute tooth, ventral margin without robust setae. <i>Uropod 1</i> not sexually dimorphic, peduncle with more than 6 robust setae, peduncle with 14 robust setae, distolateral robust seta present; inner ramus subequal in length to outer ramus, with 4 marginal robust setae; outer ramus without marginal robust setae. <i>Uropod 2</i> not sexually dimorphic; peduncle with 5 robust setae; inner ramus subequal in length to outer ramus, with 3 marginal robust setae; outer ramus with 2 marginal robust setae. <i>Uropod 3</i> peduncle with 3 robust setae; ramus shorter than peduncle, ramus linear (narrowing), ramus with 6 marginal robust setae. <i>Telson</i> longer than broad, apically incised, dorsal midline entire, with marginal and apical robust setae, telson with 8 or 9 robust setae. <b>Female</b> (sexually dimorphic characters). Based on female, 9 mm in length, AM P.87938. <i>Gnathopod 1</i> parachelate; posterior margin of merus, carpus and propodus each without lobe covered in palmate setae; propodus subrectangular; palm acute; dactylus longer than palm. <i>Gnathopod 2</i> mitten-shaped; posterior margin of merus, carpus and propodus each with lobe covered in palmate setae; carpus well developed (not enclosed by merus and propodus), posterior lobe present, projecting between merus and propodus; palm obtuse; dactylus shorter than palm. Pereopods 6 medial surface of merus and carpus without T-setae. <i>Pereopod 7</i> distal articles (merus and carpus) slender. <i>Oostegites</i> long (length greater than 2 × width), weakly setose or setae absent, setae with simple smooth tips. <i>Uropod 3</i> peduncle with 3 robust setae; ramus with 5 marginal robust setae. <b>Remarks.</b> A neotype is established for this material to stabilise this long lost species of Dana 1852. <b>Distribution.</b> <i>New South Wales</i>: shores of Illawarra (Dana 1852); Valla Beach (current study); Macleay River (current study); Smiths Lake (current study).
description: Published as part of <i>Lowry, J. K., 2012, Talitrid amphipods from ocean beaches along the New South Wales coast of Australia (Amphipoda, Talitridae), pp. 1-26 in Zootaxa 3575</i> on pages 20-25
description: {"references": ["Dana, J. D. (1852) Conspectus crustaceorum quae in Orbis Terrarum circumnavigatione, Carolo Wilkes e Classe Reipublicae Faederatae Duce, lexit et descripsit Jacobus D. Dana. Pars III. Proceedings of the American Academy of Arts and Sciences, 2, 201 - 220.", "Dana, J. D. (1853) Crustacea. Part II. United States Exploring Expedition during the years 1838, 1839, 1840, 1841, 1842 under the command of Charles Wilkes, U. S. N., 14, 689 - 1618.", "Lowry, J. K. &amp; Stoddart, H. E. (2003) Crustacea: Malacostraca: Syncarida, Peracarida: Amphipoda, Cumacea, Mysidacea. In Zoological Catalogue of Australia, vol. 19.2 B, ed. P. L. Beesley &amp; W. W. K. Houston, 531 pp. Melbourne: CSIRO Publishing, Australia.", "Lowry, J. K. &amp; Springthorpe, R. T. (2009) Talorchestia brucei sp. nov. (Amphipoda, Talitridae), the first talitrid from the Northern Territory, Australia. Crustaceana, 82 (7), 897 - 912.", "Stebbing, T. R. R. (1906) Amphipoda. I. Gammaridea. Das Tierreich, 21, 1 - 806.", "Springthorpe, R. T. &amp; Lowry, J. K. (1994) Catalogue of crustacean type specimens in the Australian Museum, Malacostraca. Technical Reports of the Australian Museum Number, 11, 1 - 134."]}