Trite concinna Rainbow 1920

Richardson, Barry J., 2016, New genera, new species and redescriptions of Australian jumping spiders (Araneae: Salticidae), Zootaxa 4114 (5), pp. 501-560 : 553-556

Trite concinna Rainbow 1920

Figs 215–229

Trite concinna Rainbow 1920: 267 , pl. 31, figs 114–119 (Part).

Type material. Lectotype, here designated: AUSTRALIA, 1F, Lord Howe Island, 159.03°E, 31.50°S, Dec. 1915, A.M. Lea (AMS KS 6762); Paralectotypes: 1M, 1 imm., Lord Howe Island, 159.03°E, 31.50°S, Dec. 1915, A.M. Lea (AMS KS 121958, ex KS6762); 1M, 1 imm., Lord Howe Island, 159.03°E, 31.50°S, Dec. 1915, A.M. Lea ( SAM NN 299, 300); 11 badly damaged specimens, Norfolk Island, 168°E, 29.08°S, Dec. 1915, A.M. Lea ( SAM NN 28317).

Remarks. The syntype series from Lord Howe Island includes two species from different genera. One specimen from the series belongs in the genus Trite and is the specimen illustrated ( Figs 115, 116 ) in Rainbow (1920). Accordingly, a female specimen (now registered as KS6762) is here designated as the lectotype of Trite concinna with the remainder of the syntype series (now AM KS 121958 and KS 121959 plus SAM N1981360) transferred to a new genus and species, Ancepitilobus howensis (see above). A male specimen of T. concinna , collected from Lord Howe Island at a later date was also available for study.

Rainbow (1920) also reported that T. concinna is found on Norfolk Island. A series of specimens (SAM NN28317) were syntypes, now paralectotypes, of this species while further specimens (AMS KS22281, ex SAM, identified as Trite concinna from Norfolk Island), also presumably a syntype, is of yet another unknown genus.

A third, more common species in the AM collection from Lord Howe Island is also labelled as T. concinna but these specimens are not part of the syntype series. This species is three times the size of the above species and is described here as Trite grayi .

Diagnosis. A small species (4.7mm; Figs 215–222 ) compared to T. grayi (11mm). The genitalia have a generally similar form in T. concinna and T. grayi . In the female ( Figs 228–228 ), T. concinna , unlike T. grayi , there are narrow rather than broad insemination ducts and copulatory openings and a distinct diverticulum on the ventral surface of each spermatheca. In the male, the endites have very distinct winged shapes in T. concinna ( Fig. 217 ) and are rounded in T. grayi Fig. 232 ). The tegulum ( Figs 223–225 ) is greatly enlarged ventrally and there is no proximal lobe, unlike T. grayi .

Description. Male: Cephalothorax ( Figs 215, 216 ) mid orange with scattered pennate grey hairs over anterior dorsal surface and sides. Surrounds of ALE, PME and PLE, black with scattered grey hairs. Carapace low and flat, eye-field much narrower than the cephalothorax. Fovea placed towards the back of the carapace. Clypeus narrow ( Fig. 217, 218 ), with sparse grey hairs. Chelicerae straight, tan with a scattering of small darker patches and a corrugated surface. One promarginal tooth and one medium sized, strongly asymmetrical unident (or fissident) retromarginal tooth. Endites, sternum and labium brown. Endites with a distinctive winged shape terminating in pointed protrusions ( Fig. 217 ). Sternum brown. Dorsal abdomen round and yellow with a faint pattern of darker markings. Spinnerets yellow. Ventral abdomen yellow. L1 brown, more robust and larger than other legs, without fringes on patella and tibia. Remaining legs yellow. Palp ( Figs 223–225 ): brown, tibia with a ‘y’-shaped apophysis. The ventral arm of which is short, broad and blunt, while the dorsal arm is longer, also broad, but with a rounded and twisted end. The long embolus begins midway down the 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 proximal lobe and markedly projecting face. Dimensions: lectotype, CL 2.35, EFL 0.87, CW 1.61, AEW 1.21, AMEW 0.99, PEW 1.24, AL 2.41, P1+T1 1.86, L1 4.02 (1.24+0.93+0.80+0.62+0.43), L2 3.65 (1.18 + 0.68 + 0.68 + 0.62 + 0.50), L3 3.65 (1.18 + 0.62 + 0.68 + 0.74 + 0.43), L4 3.68 (0.87 + 0.62 + 0.93 + 0.80 + 0.46).

Female: Lectotype. As for male except the retromarginal tooth is clearly fissident and the endites are more rounded and grades from brown to cream on the proximal edge ( Figs 219–222 ). L4 longer than L1. Epigyne ( Figs 226–228 ): The anterior copulatory openings face the median line and lead from faint curving posterior-directed guides. A simple insemination duct passes backwards and enters the anterior median edge 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 section. There is a gland or diverticulum apparent externally on the ventral surface of the first chamber. Dimensions: CL 2.04, EFL 0.90, CW 1.49, AEW 1.24, AMEW 0.74, PEW 1.24, AL 2.72, P1+T1 1.24, L1 3.22 (0.93 + 0.68 + 0.74 + 0.50 + 0.37), L2 3.03 (0.87 + 0.56 + 0.68 + 0.560 + 0.37), L3 2.91 (0.87 + 0.56 + 0.68 + 0.50 + 0.31), L4 4.33 (1.30 + 0.62 + 0.93 + 0.87 + 0.62).

Distribution and biology. Found in palm bracts on Lord Howe Island, an Australian island 700 km north-east of Sydney in the Tasman Sea, also Norfolk Island ( Fig. 229 ). The genus is otherwise unknown from Australia and its nearest relatives are likely to be found in New Caledonia.

Figures

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.

FIGURES 110 – 116. Pungalina weiri. 110 – 111 male paratype (110 dorsal view, 111 lateral view); 112 – 113 female paratype (112 dorsal view, 113 anterior view); 114 – 116 left male palp (114 prolateral view, 115 ventral view, 116 retrolateral view). Scale: general 1 mm; palp 0.2 mm.

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.