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

publication ID

http://doi.org/10.11646/zootaxa.4114.5.1

publication LSID

lsid:zoobank.org:pub:8F950473-E021-4704-9DA7-9AA9A259C5C3

persistent identifier

http://treatment.plazi.org/id/03E487E9-FFC4-E611-FF59-8F03E3DAFAA2

treatment provided by

Plazi

scientific name

Trite grayi
status

sp. nov.

Trite grayi  sp. nov.

Figs 230 –243View FIGURES 230 – 237View FIGURES 238 – 243, 16View FIGURES 9 – 16

Type material. Holotype: 1 F, 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: 1 M, Lord Howe Island, 159.03 °E, 31.50 °S, Dec. 1915, A.M. Lea ( SAM NN 298); 1 M, Lord Howe Island, Station 44, overlooking The Saddle to NE, 159.07 °E, 31.58 °S, 15 Feb. 1971, M. Gray (AMS KS 22187); 1 M, 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); 1 M, 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); 1 M, 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); 1 M, 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); 1 M, 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); 1 M, 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 230–237View FIGURES 230 – 237) compared to T. concinna  (4.7mm; Figs 215–222View FIGURES 215 – 222). The genitalia have a generally similar form in T. concinna  and T. grayi  . In the female ( Figs 241–243View FIGURES 238 – 243), T. grayi  , unlike T. concinna  ( Figs 226–228View FIGURES 223 – 229), 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 230–233View FIGURES 230 – 237). As for female. Legs covered with long hairs. Palp ( Figs 238– 240View FIGURES 238 – 243): 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, P 1 +T 1 6.25, L 1 13.12 (3.72 + 2.85 + 3.34 + 2.17 + 1.05), L 2 10.84 (3.28 + 2.17 + 2.60 + 1.86 + 0.93), L 3 10.15 (3.76 + 1.73 + 1.98 + 2.29 + 0.99), L 4 11.33 (3.34 + 1.86 + 2.48 + 2.66 + 0.99).

Female: Holotype. Large spiders (11mm; Figs 234–237View FIGURES 230 – 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. 232View FIGURES 230 – 237). 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. L 1 dark orange, more robust and larger than other legs, without fringes on patella and tibia. Remaining legs orange. Epigyne ( Figs 241–243View FIGURES 238 – 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, P 1 +T 1 4.71, L 1 10.46 (3.28 + 2.17 + 2.48 + 1.61 + 0.93), L 2 9.04 (2.66 + 1.86 + 2.44 + 1.55 + 0.93), L 3 8.92 (2.85 + 1.61 + 1.61 + 1.92 + 0.93), L 4 9.91 (2.91 + 1.67 + 2.17 + 2.29 + 0.87).

Distribution and biology. Found on Lord Howe Island ( Fig. 16View FIGURES 9 – 16). The genus is otherwise unknown from Australia and its nearest relatives are likely to be found in the Pacific Region.

SAM

South African Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Salticidae

Genus

Trite