Talorchestia terraereginae Haswell 1880
Creators: name: Serejo, Cristiana S.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Talitridae
Talorchestia
Talorchestia terraereginae

description: <i>Talorchestia terraereginae</i> Haswell, 1880 (Fig. 5, Pl. 6G) <i>Talorchestia terrae-reginae</i> Haswell, 1880: 98, pl. V, fig. 4 (including fig. 2g male on the middle right of the plate, which is labeled as fig. 2). <i>Talorchestia spinipalma</i>. — Stebbing, 1906a: 552 (in part). — Lowry &amp; Stoddart, 2003: 276. <i>Talorchestia palawanensis</i> Morino &amp; Miyamoto, 1988: 93, figs 1–3. <b>Type material.</b> Lectotype, male, 12.9 mm, AM P69180, Port Denison, Queensland, Australia (~ 20°2'00''S 148°15'00''E), on sandy beach. Paralectotypes: 1 female, 14.2 mm, AM P69181; 2 males, 9.5 mm and 12.4 mm, 9 females AM P3415, same data as lectotype. <b>Additional material examined.</b> 1 juvenile male, 10.4 mm; 1 female, 8.2 mm; AM P71060 (QLD 1722). 8 males (larger males 13.5 – 13.7 mm) and 11 females (ovigerous, 9.4 – 9.8 mm), AM P71121; 2 males and 2 females, MNRJ; (QLD 1722). <b>Type locality.</b> Port Denison, Queensland, Australia (~ 20°2'00''S 148°15'00''E), on sandy beach. <b>Description.</b> Based on lectotype, male, 12.9 mm, AM P69180. <b>Head.</b> <i>Head</i> eyes oval to subsquare (dorsal and ventral margins truncate), medium in size, 1/5–1/3 head length. <i>Antenna 1</i> short, not longer than peduncle article 4 of antenna 2. <i>Antenna 2</i> reaching end of pereonite 4 (seen in the animal, not dissected); peduncular articles narrow, articles 4 and 5 very long. <i>Mandible</i> left lacinia mobilis 5-dentate. <i>Maxilliped</i> palp article 2 with mediodistal lobe, article 4 absent. <b>Pereon.</b> <i>Gnathopod 1</i> sexually dimorphic; subchelate; posterior margin of carpus and propodus with rugose lobe; propodus subrectangular; palm transverse and short; dactylus longer than palm. <i>Gnathopod 2</i> sexually dimorphic; subchelate; carpus distinct; posterior margin of propodus half of palmar length and lacking robust setae; palm acute, with a row of 7 robust setae and a round protuberance arcuate anteriorly near dactylus hinge; dactylus subequal in length to palm with a correspondence concavity to fit the palm protuberance. <i>Coxae 2–4</i> wider than deep. <i>Pereopods 3–7</i> cuspidactylate. <i>Pereopod 4</i> short, reaching end of pereopod 3 merus; dactylus thickened and pinched posteriorly. <i>Pereopod 6</i> shorter than pereopod 7, coxa angles rounded with about 10 marginal setae. <b>Pleon.</b> <i>Pleopods 1–3</i> well developed and biramous. <i>Epimeron 1</i> anteroventral margin with 4 robust setae. <i>Epimeron 2</i> subequal in length to epimeron 3. <i>Epimeron 3</i> posterior margin smooth, posteroventral corner slightly produced, ventral margin without robust setae. <i>Uropod 1</i> peduncle with two rows of 10 and 6 setae, distolateral robust seta present; inner ramus subequal in length to outer ramus with two rows of 4-6 marginal robust setae; outer ramus without robust setae. <i>Uropod 2</i> inner ramus subequal in length to outer ramus; both rami with 4 marginal robust setae. <i>Uropod 3</i> ramus about 60% of peduncle length with marginal and apical robust setae. <i>Telson</i> longer than broad, apically incised with marginal and apical robust setae, about 10 <i>–</i> 12 robust setae per lobe; dorsal midline entire. <b>Female</b> (sexually dimorphic characters). Based on paralectotype, female, 14.2 mm, AM P69181. <i>Gnathopod 1</i> simple; posterior margin of merus, carpus and propodus lacking rugose lobe. <i>Gnathopod 2</i> mitten-shaped; basis expanded, about 1.7 x longer than wide; posterior margin of merus and propodus with rugose lobe. <b>Variations.</b> Juvenile males (9.1–11.0 mm) with antennae 2 reaching the end of pereonite 2 (seen in the animal, not dissected). Gnathopod 2 with palmar protuberance not arcuate anteriorly. <b>Remarks.</b> Since the work of Stebbing (1906a) <i>T. terraereginae</i> has been considered as a junior synonym of <i>T. spinipalma</i> as the former species was poorly described and illustrated. Study of the syntype series of <i>T. terraereginae</i> deposited in the Australian Museum, revealed important diagnostic characters that clearly distinguished this species from <i>T. spinipalma</i> as indicated in Table 1, and showed that <i>T. terraereginae</i> is a senior synonym of <i>T. palawanensis</i>. Morino &amp; Miyamoto (1988) found some specimens of <i>T. terraereginae</i> (treated as <i>T. palawanensis</i>) at Thursday Island, Australia and pointed some variations between the population from Philippines and Australia. However, as these authors stated, these differences were all size related as observed with the <i>T. terraereginae</i> population herein described. An exception is the eye shape described as “more variable and some are much broader than deep” for the Thursday Island population (Morino &amp; Miyamoto 1988). This variation in the eye shape was not observed in the present material, they all have a subsquare shape and the dorsal and ventral margins are truncate. <b>Distribution.</b> <i>Australia</i>. Queensland: Thursday Island, Torres Strait (Morino &amp; Miyamoto 1988); Port Denison (current study); Palfrey Island, Lizard Island (current study). <i>Philippine Islands</i>. Palawan Island (Morino &amp; Miyamoto 1988).
description: Published as part of <i>Serejo, Cristiana S., 2009, Talitridae *, pp. 892-903 in Zootaxa 2260 (1)</i> on pages 900-902, DOI: 10.11646/zootaxa.2260.1.51, http://zenodo.org/record/5305077
description: {"references": ["Haswell, W. A. (1880) On some new amphipods from Australia and Tasmania. Proceedings of the Linnean Society of New South Wales, 5, 97 - 105, pls 5 - 7.", "Stebbing, T. R. R. (1906 a) Amphipoda. I. Gammaridea. Das Tierreich, 21, 1 - 806.", "Lowry, J. K. &amp; Stoddart, H. E. (2003) Crustacea: Malacostraca: Syncarida, Peracarida: Amphipoda, Cumacea, Mysidacea. In: P. L. Beesley &amp; W. W. K. Houston eds. Zoological Catalogue of Australia vol. 19.2 B, 531 pp, Melbourne: CSIRO Publishing, Australia.", "Morino, H. &amp; Miyamoto, H. (1988) Redefinition of Talorchestia (Amphipoda: Talitridae) with description of a new species from the tropical West Pacific. Journal of Crustacean Biology, 8, 91 - 98."]}