Aname robertsorum Raven, 1985

Aname robertsorum Raven, 1985 View in CoL

Figs 9 View Fig , 61 View Fig

Aname robertsorum Raven, 1985: 404 View in CoL , figs 24, 39, 49.

Diagnosis

Males of A. robertsorum can be distinguished from all species for which males are known except A. calida sp. nov., A. carina , A. cassowariensis sp. nov., A. harmoniosa sp. nov., and A. tropicana sp. nov. by a moderate to large body size (carapace length>4.0 mm), and the presence of a long embolus (embolus length / bulb length>1.5) that is thin, with a sharp bend near its base before a relatively straight distal section ( Fig. 61L–M View Fig ). Males of A. robertsorum can be distinguished from those of A. calida , A. cassowariensis , and A. tropicana by the presence of a longer embolus (embolus length / bulb length>2) ( Fig. 61L–M View Fig ; cf. Figs 56 View Fig , 59 View Fig , 62 View Fig ). Males of A. robertsorum can be distinguished from those of A. carina by the presence of a more proximally-positioned tibial spur (distance to spur/ tibia length <0.6) ( Fig. 61P View Fig ; cf. Fig. 57 View Fig ). Males of A. robertsorum can be distinguished from A. harmoniosa by the presence of a shorter proximal excavation on metatarsus I (excavation length/ metatarsus length ~ 0.44; cf. ~ 0.55 in A. harmoniosa ), and a straighter embolus ( Fig. 61L–Q View Fig ; cf. Fig. 60 View Fig ).

Females of A. robertsorum are unknown.

Type material

Holotype

AUSTRALIA – Queensland • ♂; Shiptons Flat ; 15°48′ S, 145°15′ E; 16–21 Nov. 1975; R. Munroe and V.E. Davies leg.; pitfall trap, rainforest; QMB S1287 View Materials .

GoogleMaps

Other material examined

AUSTRALIA – Queensland • 1 ♂; Windsor Tableland ; 16°18′ S, 145°05′ E; 900 m a.s.l.; 25 Nov. 1997 – 9 Feb. 1998; G.B. Monteith and D.J. Cook leg.; pitfall trap, open forest; QMB S44717 GoogleMaps .

Description

Male (holotype, QMB S1287)

GENERAL ( Fig. 61A–Q View Fig ). Body length 20.92, in moderate condition, colour faded significantly due to preservation.

DORSAL PROSOMA ( Fig. 61A, E–F View Fig ). Carapace length 7.70, width 6.22, length/width 1.24, clypeus to fovea length/carapace length 0.69, caput width/carapace width 0.66, carapace orange, caput slightly darker than thorax, reflective setae present, moderate on caput, moderate on thorax, fovea procurved, fovea width/carapace length 0.12 ( Fig. 61A, F View Fig ); chelicerae red-brown, rastellum absent or inconspicuous, chelicerae length/carapace length 0.53 ( Fig. 61A View Fig ); eye group rectangular, width/length 1.74, eye tubercle present ( Fig. 61E View Fig ).

ABDOMEN ( Fig. 61B, D View Fig ). Abdomen length 8.39, light grey-brown, dorsal pattern absent, with consistent cover of short setae.

VENTRAL PROSOMA ( Fig. 61C, G–I View Fig ). Labium cuspules absent ( Fig. 61H View Fig ); maxillae heel distinct, cuspules present, count =about 102, extending posteriorly onto heel, extending laterally about 30% of maxillae length ( Fig. 61C, I View Fig ); coxae cuspules absent, thorn-like setae on prolateral face present ( Fig. 61C, I View Fig ); sternum length/width 1.15, central sternum with consistent covering of short setae, row of longer setae around posterior edges ( Fig. 61G–H View Fig ); posterior sigilla semi-elongate, central sternum to posterior sigilla length/sternum length 0.25, posterior sigilla length/sternum length 0.15 ( Fig. 61G–H View Fig ); other sigilla small, round and lateral ( Fig. 61G–H View Fig ).

LEG I ( Fig. 61N–Q View Fig ). Leg I orange-brown, lighter on patella, tibia, distal metatarsus and tarsus, femur length 6.07, patella length 4.10, tibia length 4.57, metatarsus length 4.75, tarsus length 2.82, total length 22.31, leg I length/carapace length 2.90 ( Fig. 61N–O View Fig ); scopulae on distal metatarsus and tarsus ( Fig. 61N–O View Fig ); spine count Fe D 0, Fe PL 1, Pa PL 2, Ti PL 0, Ti RL 0, Me PL 0, Me RL 0, Ta 0 ( Fig. 61N–O View Fig ); tibia length/width [TIL/TID] 3.59, even width along length, spur present, intermediate triangular/digitiform, knuckle absent, megaspine angled at 20 degrees, length to distal face of spur/ tibia length [TIS/TIL] 0.53, spur height/tibia width [TISH/TID] 0.75, megaspine length/tibia length 0.22 ( Fig. 61N–P View Fig ); metatarsus slightly sinuous, proximal excavation present, excavation concave with inconspicuous heel, heel rounded, excavation length/metatarsus length [MIPEL/MIL] 0.44, metatarsus length/width [MIL/MID] 4.29 ( Fig. 61N–O, Q View Fig ).

PEDIPALP ( Fig. 61J–M View Fig ). Tibia length 3.15, width 1.20, length/width [PTL/PTD] 2.63, asetose depression present, depression length/palp tibia length [PDL/PTL] 0.60, retrolateral face with short, thorn-like setae along retrolateral edge of depression, getting denser proximally, ventral face with two elongate bristle-like setae below depression, prolateral face with two disto-ventral spines and a single medial spine, disto-medial spine absent ( Fig. 61J–K View Fig ); patella prolateral face with 2 (distal rubbed off) spines ( Fig. 61J–K View Fig ); cymbium with scopulae present distally ( Fig. 61J–K View Fig ); copulatory organ total length 1.69, length/palp tibia length 0.54 ( Fig. 61L–M View Fig ); bulb length/width 0.95 ( Fig. 61L–M View Fig ); embolus tapering from bulb, attenuate, very thin, protruding laterally with strong basal curve, one strong bend, at about 0.4 of length, slight bend before tip, width at base/bulb width 0.26, embolus length/bulb length 2.20 ( Fig. 61L–M View Fig ).

Distribution and natural history

Aname robertsorum occurs in northern Queensland, in the Wet Tropics bioregion. It is known from two locations, a northern location near Shiptons Flat, and a southern location in Mount Windsor National Park ( Fig. 9 View Fig ). The form of burrows constructed by spiders of this species is unknown, but is likely to be similar to that of other robertsorum -complex species ( Fig. 9 View Fig ).