Trite grayi, Richardson, Barry J., 2016

Richardson, Barry J., 2016, New genera, new species and redescriptions of Australian jumping spiders (Araneae: Salticidae), Zootaxa 4114 (5), pp. 501-560 : 556-558

Trite grayi sp. nov.

Figs 230–243 , 16

Type material. Holotype: 1F, AUSTRALIA, Lord Howe Island, Station 34, W slope of Smoking Tree Ridge, 159.08°E, 31.55°S, 2 Jul. 1971, M. Gray (AMS KS 22196); Paratypes: 1M, Lord Howe Island, 159.03°E, 31.50°S, Dec. 1915, A.M. Lea ( SAM NN 298); 1M, Lord Howe Island, Station 44, overlooking The Saddle to NE, 159.07°E, 31.58°S, 15 Feb. 1971, M. Gray (AMS KS 22187); 1M, Lord Howe Island, Station 42, foot of saddle rise, Erskine Valley, 159.07°E, 31.57°S, 15 Feb. 1971, M. Gray (AMS KS 22195); 1M, Lord Howe Island, Station 42, foot of saddle rise, Erskine Valley, 159.07°E, 31.57°S, 15 Feb. 1971, M. Gray (AMS KS 22200); 1M, Lord Howe Island, Station 45, NE area of Mount Gower summit, 159.07°E, 31.58°S, 15 Feb. 1971, M. Gray (AMS KS 22189); 1M, Lord Howe Island, Station 10, SE slope of Kim's Lookout, 159.05°E, 31.52°S, 31 Jan. 1971, M. Gray (AMS KS 22193); 1M, Lord Howe Island, Station 45, NE area of Mount Gower summit, 159.07°E, 31.58°S, 15 Feb. 1971, M. Gray (AMS KS 22191); 1M, Lord Howe Island, Station 45, NE area of Mount Gower summit, 159.07°E, 31.58°S, 15 Feb. 1971, M. Gray (AMS KS 22198).

Etymology. Named for Dr M. Gray, who collected the type material.

Remarks. A third species in the AM collection is also labelled as Trite concinna (see also Ancepitilobus howensis ). These specimens are three times the size of specimens of the other two species and clearly belong to a different, and new, species.

Diagnosis. A large species (11mm; Figs 230–237 ) compared to T. concinna (4.7mm; Figs 215–222 ). The genitalia have a generally similar form in T. concinna and T. grayi . In the female ( Figs 241–243 ), T. grayi , unlike T. concinna ( Figs 226–228 ), has broad rather than narrow insemination ducts and copulatory openings and no diverticulum on the ventral surface of each spermatheca. In the male, the endites are rounded in T. grayi rather than with the very distinct winged shapes found in T. concinna . The tegulum is not greatly enlarged ventrally and there is a small proximal lobe in T. grayi , unlike T. concinna .

Description. Male: Paratype ( Figs 230–233 ). As for female. Legs covered with long hairs. Palp ( Figs 238– 240 ): long, brown, covered with long brown hairs. Cymbium relatively small. Tibial apophysis has a dorsal shoulder leading to a narrow pointed tip. The short embolus begins on the distal posterior edge of the tegulum and bends in a slight clockwise direction over an anterior lobe edged with the seminal duct. The tegulum has a weakly developed proximal lobe and a clear membrane which passes diagonally from the base of the embolus across the middle of the distal lobe to the middle of the anterior edge of the tegulum. Dimensions: CL 5.35, EFL 1.17, CW 4.40, AEW 3.59, AMEW 2.11, PEW 3.53, AL 6.63, P1+T1 6.25, L1 13.12 (3.72 + 2.85 + 3.34 + 2.17 + 1.05), L2 10.84 (3.28 + 2.17 + 2.60 + 1.86 + 0.93), L3 10.15 (3.76 + 1.73 + 1.98 + 2.29 + 0.99), L4 11.33 (3.34 + 1.86 + 2.48 + 2.66 + 0.99).

Female: Holotype. Large spiders (11mm; Figs 234–237 ) with elliptically shaped abdomens, tapering to the rear. Males and females have similar general morphology. Cephalothorax dark orange with lighter sections from the PLE to the back of the pars thoracica covered with white hairs. Immediate surrounds of ALE, PME and PLE, black with covering of ginger hairs around ALE and PME and white hairs around PLE. Sides of the pars cephalica covered with a thick bush of long ginger hairs. Carapace moderately high, sides rounded. Clypeus narrow, with thin moustache of grey hairs. Chelicerae dark orange, short, broad, rounded with a corrugated surface. Two large promarginal teeth and one medium sized, unident, strongly asymmetrical, retromarginal tooth. Endites and labium dark orange, yellow distally. Endites with a flattened medial edge and rounded distal edge ( Fig. 232 ). Sternum orange. Dorsal abdomen yellow with a pair of darker longitudinal bands and a lateral lacy pattern of narrow stripes.

Spinnerets yellow. Ventral abdomen yellow. L1 dark orange, more robust and larger than other legs, without fringes on patella and tibia. Remaining legs orange. Epigyne ( Figs 241–243 ): The anterior copulatory openings face the median line and lead from well-defined pits and guides. The insemination ducts pass backwards, narrow, and enter the lateral edge of the posterior lobe of the spermatheca. No gland could be seen on the insemination duct. The spermatheca is partially divided into two sections with the fertilization duct exiting from the dorsal medial edge of the second, anterior, section. No diverticulum is apparent on the surface of the first chamber. Dimensions: CL 4.77, EFL 2.04, CW 4.02, AEW 3.41, AMEW 2.11, PEW 3.41, AL 6.25, P1+T1 4.71, L1 10.46 (3.28 + 2.17 + 2.48 + 1.61 + 0.93), L2 9.04 (2.66 + 1.86 + 2.44 + 1.55 + 0.93), L3 8.92 (2.85 + 1.61 + 1.61 + 1.92 + 0.93), L4 9.91 (2.91 + 1.67 + 2.17 + 2.29 + 0.87).

Distribution and biology. Found on Lord Howe Island ( Fig. 16 ). The genus is otherwise unknown from Australia and its nearest relatives are likely to be found in the Pacific Region.

Figures

FIGURES 230 – 237. Trite grayi sp. nov. 230 – 233 male paratype (230 dorsal view, 231 lateral view, 232 ventral view, 233 anterior view); 234 – 237 female holotype (234 dorsal view, 235 lateral view, 236 ventral view, 237 anterior view). Scale: 2 mm.

FIGURES 238 – 243. Trite grayi sp. nov. 238 – 240 left male palp (238 prolateral view, 239 ventral view, 240 retrolateral view); 241 – 243 female genitalia holotype (241 dorsal view, 242 ventral view, 243 ventral view). Scale: palp 0.5 mm, epigyne 0.2 mm.

FIGURES 9 – 16. Ancepitilobus howensis sp. nov. 9 – 11 left male palp, holotype (9 prolateral view, 10 ventral view, 11 retrolateral view); 12 – 15 female genitalia, paratype (12 dorsal view, 13 cleared, dorsal view, 14 ventral view, 15 ventral view); 16 map showing similar distributions of Ancepitilobus howensis, Trite grayi and Tara gratiosa comb. nov. Scale: 0.2 mm.

FIGURES 215 – 222. Trite concinna comb. nov. 215 – 218 male paralectotype (215 dorsal view, 216 lateral view, 217 ventral view, 218 anterior view); 219 – 222 female lectotype (219 dorsal view, 220 lateral view, 221 ventral view, 222 anterior view). Scale: male 2 mm, female 1 mm.

FIGURES 223 – 229. Trite concinna comb. nov. 223 – 225 paralectotype left male palp (223 prolateral view, 224 ventral view, 225 retrolateral view); 226 – 228 female genitalia (226 dorsal view, 227 ventral view, 228 ventral view); 229 map showing known distribution. Scales: palp 0.5 mm, epigyne 0.1 mm.