Talorchestia capensis K.H. Barnard, 1916 : 216 K.H. Barnard, 1940 : 470 Griffiths, 1974b : 330 Griffiths, 1975 : 171 Hesp & McLachlan, 2000 : 156 New talitrids from South Africa (Amphipoda, Senticaudata, Talitroidea, Talitridae) with notes on their ecology Lowry, J. K. Baldanzi, S. Zootaxa 2016 4144 2 151 174 5WXJS Dana, 1853 Dana 1853 [151,600,439,466] Malacostraca Talitridae Capeorchestia Animalia Amphipoda 12 163 Arthropoda species capensis     Talorchestia capensis. ―  K.H. Barnard, 1916: 216. ―  K.H. Barnard, 1940: 470, fig. 21. ―  Griffiths, 1974b: 330. ―  Griffiths, 1975: 171. ―  Hesp & McLachlan, 2000: 156(ecology).    Types. Neotype, male, 10 mm, AM P.88482, Pringle Bay, Western Cape, South Africa( 34° 20'30"S 18°49'24"E), under kelp, dissipative beach, S. Baldanzi,  November 2011.    Additional material examined. 2 females, Kleinmond(western cape), South Africa(~ 34°20.474’S 19°2.314’E), underneath kelp dissipative beach, Simone Baldanzi, winter 2010, KLEIL2 Bw;  8 females, Knysna(western cape), South Africa(~ 34°4.317’S 23°0.755’E), underneath kelp dissipative beach, Simone Baldanzi, winter 2010, Kn L1 Cw;  1 female, Pringle Bay, Western Cape, South Africa(~ 34°20.5'S 18°49.4'E), underneath kelp dissipative beach, Simone Baldanzi, winter 2010, PRINGL1 Cw; 1 male (immature), AM P.88472,  1 female(ovigerous) AM P.97674, Port Nolloth, Northern Cape, South Africa( 29°15'S 16°52'E), underneath kelp and macroalgae on dissipative beach, S. Baldanzi,  November 2010; 1 male, AM P.99076, 3 males,  6 females, AM P.98284, Port Nolloth, Northern Cape, South Africa( 29°15'S 16°52'E), underneath kelp and macroalgae on dissipative beach, S. Baldanzi,  November 2010;  5 males, Franskraal( Western Cape) (one larger than others), winter 2010, FS L2C.  3 specimens, AM P.88475 Yzerfontein, Western Cape, South Africa( 33°21'26"S 18°09'15"E), under kelp, dissipative beach, S. Baldanzi,  December 2010; 10+ specimens, AM P.88476, Hondeklibaai, Northern Cape, South Africa( 30°18'52"S 17°16'30"E), S. Baldanzi, 2010;  21 specimens, AM P.88477, Pringle Bay, Western Cape, South Africa( 34°20'30"S 18°49'24"E), S. Baldanzi,  November 2011;  8 specimens, AM P.88474, Knysna, Western Cape, South Africa( 34°04'19"S 23°00'45"E), under macroalgae, dissipative beach, S. Baldanzi, February, 2011;  2 specimens, AM P.88471, Kleinmond, Western Cape, South Africa( 34°20'28"S 19°2'19"E), under kelp, dissipative beach, S. Baldanzi,  November 2011; 5 males, AM P.88470 [possibly take gnathopods of smallest male for SEM],  2 females, AM P.88483, Franskraal, Western Cape, South Africa( 34°36'15"S 19°24'12"E), under kelp, dissipative beach, S. Baldanzi, February, 2011.    Typelocality. Pringle Bay, Western Cape, South Africa( 34° 20'30"S 18°49'24"E) underneath kelp, dissipative beach.   Description.Based on neotype, male, 10 mm, AM P.88482.  Headwith seven groups of short, slender scales along ventroproximal surface (short scales). Eyespresent. Antenna 1short, not longer than peduncular article 4 of antenna 2. Antenna 2less than half body length; peduncular articles slender, without marginal row of robust setae, with sparse, small robust setae; article 5 longer than article 4; flagellar articles final article minute, not cone-shaped, virgula divinaabsent, flagellar articles without apical cluster of serrate setae. Labrumupper lip with apical setal patch; epistome with a few robust setae (in one distal row), with many pores. Labiumdistolateral setal tuft absent; distomedial setal tuft present. Mandibleleft lacinia mobilis 4- cuspidate. Maxilla 1with small palp, 2-articulate. Maxillipedpalp article 2 distomedial lobe well developed; article 4 fused with article 3.  Pereon. Gnathopod 1sexually dimorphic; parachelate; coxa smaller than coxa 2; posterior margin of propodus with lobe covered in palmate setae, palmate lobes in male only; carpus longer than propodus, 1.8 × as long as propodus, 2.5 × as long as broad; propodus subrectangular, anterior margin with 5 groups of about 15 short robust setae, propodus 1.5 × as long as broad, palm transverse, with 18 short robust setae in two patches, without spine patch on posterodistal corner; dactylus longer than palm, simplidactylate, without anterodistal denticular patch. Gnathopod 2sexually dimorphic; subchelate; posterior margin of merus, carpus and propodus each without lobe covered in palmate setae; basis slightly expanded; ischium without lobe on anterior margin, with distally rounded anterodistal lobe on medial surface; carpus triangular, reduced (enclosed by merus and propodus), posterior lobe absent, not projecting between merus and propodus; propodus 1.3 × as long as wide, palm extremely acute, reaching between 44% along posterior margin, smooth, with rounded protuberance near dactylar hinge, not lined with robust setae, deeply excavate, posterodistal corner defined by large thumb, posteromedial surface without groove, without cuticular patch at corner of palm; dactylus subequal in length to palm, sinusoidal, without anteroproximal bump, posterior margin smooth, with shallow posterodistal sinus. Pereopods 2–4coxae deeper than wide. Pereopods 3–7cuspidactylate, dactyli without anterodistal patch of many rows of tiny setae. Pereopod 4dactylus thickened proximally with a notch midway along posterior margin (granular surface). Pereopod 5propodus slightly shorter than carpus; dactylus without anterodistal setal patch (small tripod spines lateral to cuspidactylate spines). Pereopods 6–7not sexually dimorphic; merus, carpus, propodus with many strong robust setae. Pereopod 6posterior lobe with about 40 marginal slender setae. Pereopod 7basis lateral sulcus present, slightly pronounced, posterior margin with numerous small robust setae, posterodistal lobe produced downwards almost to merus, shallow, broadly rounded; merus posterior margin expanded distally, subtriangular; propodus setation without large distal tuft of setae.  Pleon. Pleopodsall well developed. Pleopods 1–3biramous. Epimeron 2longer than epimeron 3, posterior margin minutely serrate. Epimeron 3posterior margin minutely serrate, with about 9 setae, posteroventral corner rounded. Uropod 1peduncle 14 slender setae, tiny distolateral robust seta with simple tip; inner ramus spatulate, subequal in length to outer ramus, with 5 lateral and 6 medial marginal robust setae in 2 rows; outer ramus with 4 marginal robust setae in one row. Uropod 2peduncle with 4 robust setae; inner ramus subequal in length to outer ramus, with 4 lateral and 4 medial marginal robust setae in 2 rows; outer ramus with 5 marginal robust setae in 1 row. Uropod 3peduncle with 7–8 robust setae; ramus partially fused to peduncle, ramus longer than or subequal in length to peduncle, ramus 2 to 3 × as long as broad, linear (narrowing) or spatula-like, with 10 marginal setae, with than 6+ apical setae.  Telsonbroader than long, rounded distally, apically incised, dorsal midline entire, with marginal and apical robust setae, at least 12–16 robust setae per lobe.  Female (sexually dimorphic characters ). Gnathopod 1simple; posterior margin of merus, carpus and propodus each without lobe covered in palmate setae; carpus 1.9 × as long as propodus, 2.4 × as long as broad; propodus subrectangular, tapering slightly distally, anterior margin with 4 groups of 15 robust setae, propodus 2 × as long as broad. Gnathopod 2chelate; basis expanded anteroproximally; without anterodistal lobe on medial surface; carpus well developed (not enclosed by merus and propodus), posterior lobe present, projecting between merus and propodus; propodus palm obtuse, nearly straight, lined with serrate setae; dactylus slightly shorter than palm, curved.   Distribution.  South Africa. Lamberts Bay ( K.H. Barnard 1916), Kommetje ( K.H. Barnard 1916), Capeof Good Hope ( K.H. Barnard 1916); Keurbooms River, Plettenberg Bay ( K.H. Barnard 1940); Knysna ( Griffiths 1974b); Port Beaufort and Moddergat, Breede River Estuary ( Griffiths 1974b); Port St Johns, Umzimvubu River mouth ( Griffiths 1974b). 1288100515 2011-11 S. Baldanzi South Africa -34.341667 Pringle Bay 19 18.823334 12 163 2 Western Cape neotype 1288100503 KLEI Simone Baldanzi & Bw South Africa -34.341232 Kleinmond 1 19.038567 12 163 2 2 1288100522 Simone Baldanzi & Kn L & Cw South Africa -34.07195 Knysna 1 23.012583 12 163 8 8 1288100509 PRING Simone Baldanzi & Cw South Africa -34.341667 Pringle Bay 119 18.823334 12 163 1 1 Western Cape 1288100500 2010-11 S. Baldanzi South Africa -29.25 Port Nolloth 1228 16.866667 12 163 1 1 Northern Cape 1288100519 2010-11 S. Baldanzi South Africa -29.25 Port Nolloth 1228 16.866667 12 163 6 6 Northern Cape 1288100505 South Africa Franskraal 12 163 5 5 Western Cape 1288100514 2010-12 S. Baldanzi South Africa -33.35722 Yzerfontein 20 18.154167 12 163 3 Western Cape 1288100512 S. Baldanzi South Africa -30.314444 Hondeklibaai 20 17.275 12 163 1 Northern Cape 1288100513 2011-11 S. Baldanzi South Africa -34.341667 Pringle Bay 19 18.823334 12 163 21 Western Cape 1288100501 S. Baldanzi & February South Africa -34.071945 Knysna 19 23.0125 12 163 8 Western Cape 1288100518 2011-11 S. Baldanzi South Africa -34.34111 Kleinmond 19 19.03861 12 163 2 Western Cape 1288100516 S. Baldanzi & February South Africa -34.604164 Franskraal 19 19.403334 12 163 2 2 Western Cape 1288100521 South Africa -34.341667 Pringle Bay 19 18.823334 12 163 1 Western Cape holotype