Talorchestia terrae-reginae Haswell, 1880: 98 Talorchestia spinipalma Stebbing, 1906a: 552 Lowry & Stoddart, 2003: 276 Talorchestia palawanensis Morino & Miyamoto, 1988: 93 Talitridae * Serejo, Cristiana S. Zootaxa 2009 2009-10-08 2260 1 892 903 54M2B Haswell, 1880 Haswell 1880 [151,649,422,448] Malacostraca Talitridae Talorchestia Animalia Amphipoda 8 900 Arthropoda species terraereginae  ( Fig. 5, Pl. 6G)      Talorchestia terrae-reginae Haswell, 1880: 98, pl. V, fig. 4 (including fig. 2gmale on the middle right of the plate, which is labeled as fig. 2).    Talorchestia spinipalma. —  Stebbing, 1906a: 552(in part). —  Lowry & Stoddart, 2003: 276.     Talorchestia palawanensis Morino & Miyamoto, 1988: 93, figs 1–3.   Type material.  Lectotype, male, 12.9 mm, AMP69180, Port Denison, Queensland, Australia(~ 20°2'00''S 148°15'00''E), on sandy beach.  Paralectotypes: 1 female, 14.2 mm, AMP69181; 2 males, 9.5 mmand 12.4 mm,  9 females AM P3415, same data as lectotype.  Additional material examined. 1 juvenilemale, 10.4 mm;  1 female, 8.2 mm; AMP71060 ( QLD 1722). 8 males(larger males 13.5 – 13.7 mm) and  11 females(ovigerous, 9.4 – 9.8 mm), AMP71121;  2 malesand 2 females, MNRJ; ( QLD 1722).    Typelocality. Port Denison, Queensland, Australia(~ 20°2'00''S 148°15'00''E), on sandy beach.   Description.Based on lectotype, male, 12.9 mm, AM P69180.  Head. Headeyes oval to subsquare (dorsal and ventral margins truncate), medium in size, 1/5–1/3 head length. Antenna 1short, not longer than peduncle article 4 of antenna 2. Antenna 2reaching end of pereonite 4 (seen in the animal, not dissected); peduncular articles narrow, articles 4 and 5 very long. Mandibleleft lacinia mobilis 5-dentate. Maxillipedpalp article 2 with mediodistal lobe, article 4 absent.  Pereon. Gnathopod 1sexually dimorphic; subchelate; posterior margin of carpus and propodus with rugose lobe; propodus subrectangular; palm transverse and short; dactylus longer than palm. Gnathopod 2sexually 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. Coxae 2–4wider than deep. Pereopods 3–7cuspidactylate. Pereopod 4short, reaching end of pereopod 3 merus; dactylus thickened and pinched posteriorly. Pereopod 6shorter than pereopod 7, coxa angles rounded with about 10 marginal setae.  Pleon. Pleopods 1–3well developed and biramous. Epimeron 1anteroventral margin with 4 robust setae. Epimeron 2subequal in length to epimeron 3. Epimeron 3posterior margin smooth, posteroventral corner slightly produced, ventral margin without robust setae. Uropod 1peduncle 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. Uropod 2inner ramus subequal in length to outer ramus; both rami with 4 marginal robust setae. Uropod 3ramus about 60% of peduncle length with marginal and apical robust setae.  Telsonlonger than broad, apically incised with marginal and apical robust setae, about 10 –12 robust setae per lobe; dorsal midline entire.  Female(sexually dimorphic characters). Based on paralectotype, female, 14.2 mm, AMP69181. Gnathopod 1simple; posterior margin of merus, carpus and propodus lacking rugose lobe. Gnathopod 2mitten-shaped; basis expanded, about 1.7 x longer than wide; posterior margin of merus and propodus with rugose lobe.  Variations.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.   Remarks.Since the work of Stebbing (1906a)  T. terraereginaehas been considered as a junior synonym of  T. spinipalmaas the former species was poorly described and illustrated. Study of the syntypeseries of  T. terraereginaedeposited in the Australian Museum, revealed important diagnostic characters that clearly distinguished this species from  T. spinipalmaas indicated in Table 1, and showed that  T. terraereginaeis a senior synonym of  T. palawanensis. Morino & Miyamoto (1988)found some specimens of  T. terraereginae(treated as  T. palawanensis) at Thursday Island, Australiaand pointed some variations between the population from Philippinesand Australia. However, as these authors stated, these differences were all size related as observed with the  T. terraereginaepopulation 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 & 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.   Distribution.  Australia. Queensland: Thursday Island, Torres Strait ( Morino & Miyamoto 1988); Port Denison (current study); Palfrey Island, Lizard Island (current study).  Philippine Islands. PalawanIsland ( Morino & Miyamoto 1988). P69180 AM Australia -20.033333 Port Denison 21 148.25 8 900 1 Queensland lectotype P69181 [528,1111,740,766] AM Australia 8 900 1 1 Queensland paralectotype P69180 [211,742,778,804] AM Australia -20.033333 Port Denison 21 148.25 8 900 P3415 9 9 Queensland paralectotype P71060 [906,1432,817,843] AM 8 900 QLD 1722 1 1 P71121 [661,1262,856,882] AM 8 900 11 11 MNRJ 8 900 QLD 1722 4 2 2 [198,1314,932,959] Australia -20.033333 Port Denison 21 148.25 8 900 1 Queensland holotype P69181 AM 8 900 1 paralectotype