Angaeus verrucosus, Benjamin, 2017

Benjamin, Suresh P., 2017, A new species of Angaeus from Malaysia with possible affinity to related genera within Stephanopinae (Araneae: Thomisidae), Zootaxa 4337 (2), pp. 297-300 : 297-300

Angaeus verrucosus sp. nov. Figs 1–14

Type material. Holotype: male from Malaysia, Borneo, West Sabah, Mt. Kinabalu National Park, Sorinsim , 6.15° N, 116.50° E, 40 year old secondary forest, 500–700 m, fogging canopy tree 6 Vinex pinnaTa, refog 1 after 8 days, 0 7 March 1997, leg. A. Floren, loc 60 ( RMNH.ARA.15928).

Other material examined. MALAYSIA: Borneo: West Sabah, Mt. Kinabalu National Park , 6.15° N, 116.50° E: 2 males, 1 female, several juveniles,, 5 year old secondary forest, 500–700 m, fogging canopy tree 1, Melochia umbellaTa, loc 19, 16 February 1997, leg. A. Floren, ( RMNH.ARA.17157) ; 1 male, 2 juveniles, fogging canopy tree 5, refogg 2 after 3 days, loc 27, 24 February 1997(RMNH.ARA.15909); 2 males, 1 female, several juveniles, fogging canopy tree 5, Melochia umbellaTa, refogg after 17 days, loc 29, 10 March 1997 (RMNH.ARA.17158); 2 males, 2 juveniles, fogging canopy tree 10, Melochia umbellaTa, refogg after 1 day, loc 34, 10 March 1997 (RMNH.ARA.17159); 1 male (fragments), fogging canopy, Vinex pinnaTa, loc 50, 26 February –12 March 1997 ( RMNH.ARA.15925). All material leg. A. Floren.

Etymology. The species name refers to the red coloration of the holotype.

Diagnosis. Males of A. verrucosus sp. nov. can be diagnosed by the elongated tibia of the male palp in combination with the concave shape of the MA and the shape of RTA ( Figs 1, 2, 7 , 8, 11 ). Females can be separated by the shape of H and ET ( Figs 3 , 13 ).

Description. Male: Total length: 6.3; prosoma length: 3.1, width: 2.9. Leg I: femur 5.0, patella 1.5, tibia 5.0, metatarsus 3.5, tarsus 1.5. Leg formula 1243. Leg I femur with mounds of fine setae (sometimes with a spine), claw tufts present and dense. Prosoma dark red brown, apex lighter. Posterior portions of prosoma rounded, anterior eye region projected beyond the clypeus. Eyes not on tubercles, ALE>PLE>PME>AME, both rows recurved, distance between PMEs larger that distance between AME. ALE project slightly forwards. Opisthosoma dark brown with white spots, apex with dark triangular markings. Shape of opisthosoma oval, center broadest, cololus absent ( Fig 14 ). Palp: tibia elongated, cymbium and tegulum oval, cymbium with trichobothria. E tapering, short. MA present, leaf-like, C absent ( Figs 1, 2, 7 , 8–11 ). However, note the presence of a structure of unknown function adjunct to E that is highlighted “C?” in Fig 11 .

Female: Total length: 11.0; prosoma length: 4.5, width: 4.5. Leg I: femur 5.5, patella 1.5, tibia 5.0, metatarsus 3.1, tarsus 1.5. In general similar to male. Females differ in less prominent white spots and prominent triangular marking on the grey dorsum of opisthosoma. Epigynum with hood and ET; S kidney shaped, CO laterally, below ET ( Figs 3 , 13 ).

Distribution. Malaysia, Mt. Kinabalu National Park.

Figures

FIGURES 1 – 7. Angaeus verrucosus sp. nov. (RMNH). 1 – 2, 7 left male palp (1, 7 ventral, 2 retrolateral); 3 epigynum, ventral; 4 vulva, dorsal; 5 female habitus, dorsal; 6 male habitus, dorsal. Scale bars = 0.2 mm (1 – 4, 7), 1.0 mm (5), 2.0 mm (6).

FIGURES 8 – 14. Scanning electron micrographs of Angaeus verrucosus sp. nov. (RMNH). 8 – 11 left male palp (8, 11 ventral; 9, 10 dorsal, showing the trichobothria of the cymbium); 12 tarsal organ, female, left leg I; 13 epigynum, ventral; 14 female prosoma, ventral. Scale bars = 10 µm (10), 20 µm (12), 100 µm (9, 11, 13), 200 µm (8, 14).