Aname blackdownensis Raven, 1985

Wilson, Jeremy D., Harvey, Mark S., Simmons, Leigh W. & Rix, Michael G., 2025, An integrative systematic revision of the wishbone spiders (Araneae: Anamidae: Aname L. Koch, 1873) of subtropical and tropical eastern Australia, with the description of 55 new species, European Journal of Taxonomy 985, pp. 1-298 : 29-31

Aname blackdownensis Raven, 1985

Figs 1 , 6 , 21–22

Aname blackdownensis Raven, 1985: 385 , figs 14, 32, 61.

Diagnosis

Adult males and females of A. blackdownensis can be distinguished from those of all other species by the presence of erect, bristle-like setae on the posterior part of the abdomen ( Figs 21B, D , 22B, D ).

Type material

Holotype

AUSTRALIA – Queensland • ♀; Blackdown Tableland National Park ; 23°48′ S, 149°08′ E; 1–6 Feb. 1981; R.J. Raven leg.; QMB S1248 .

Paratypes

AUSTRALIA – Queensland • 2 ♀♀, 5 juvs; Blackdown Tableland National Park ; 23°48′ S, 149°08′ E; 1–6 Feb. 1981; R.J. Raven leg.; QMB S1249 .

Other material examined

AUSTRALIA – Queensland • 1 ♀; Blackdown Tableland National Park , off track to Two Mile Falls ; 23°45′ S, 149°06′ E; 821 m a.s.l.; 20 Apr. 2023; J.D. Wilson and M.G. Rix leg.; excavated, open burrow on ground; QMB S118294 • 1 ♀; Blackdown Tableland National Park , off track to Two Mile Falls; 23°45′ S, 149°06′ E; 820 m a.s.l.; 20 Apr. 2023; J.D. Wilson and M.G. Rix leg.; excavated, open burrow on ground; QMB S118295 • 1 ♀; Blackdown Tableland National Park , off Charlevue Road; 23°45′ S, 149°06′ E; 832 m a.s.l.; 20 Apr. 2023; J.D. Wilson and M.G. Rix leg.; excavated, open burrow on ground; QMB S118290 • 1 ♂; Blackdown Tableland National Park , off Charlevue Road; 23°45′ S, 149°06′ E; 838 m a.s.l.; 20 Apr. 2023; J.D. Wilson and M.G. Rix leg.; excavated, open burrow on ground; QMB S118292 • 1 ♀; Blackdown Tableland National Park , off Charlevue Road; 23°45′ S, 149°06′ E; 838 m a.s.l.; 20 Apr. 2023; J.D. Wilson and M.G. Rix leg.; excavated, open burrow on ground; QMB S118293 • 1 ♂; Blackdown Tableland National Park , via Dingo; 23°53′ S, 149°06′ E; 11–12 Apr. 1996; G.B. Monteith leg.; QMB S46805 .

Description

Male (QMB S118292)

GENERAL ( Fig. 21A–Q ). Body length 14.49, in good condition.

DORSAL PROSOMA ( Fig. 21A, E–F ). Carapace length 5.17, width 4.29, length/width 1.20, clypeus to fovea length/carapace length 0.69, caput width/carapace width 0.68, carapace dark red-brown, reflective setae present, moderate on caput, light on thorax, fovea procurved, fovea width/carapace length 0.15 ( Fig. 21A, F ); chelicerae very dark chocolate-brown, rastellum absent or inconspicuous, chelicerae length/carapace length 0.61 ( Fig. 21A ); eye group rectangular, width/length 1.93, eye tubercle present ( Fig. 21E ).

ABDOMEN ( Fig. 21B, D ). Abdomen length 6.05, chocolate-brown, dorsal pattern absent, with reflective setae on anterior portion and erect bristle-like setae on posterior portion.

VENTRAL PROSOMA ( Fig. 21C, G–I ). Labium cuspules absent ( Fig. 21H ); maxillae heel distinct, cuspules present, count =about 80, extending posteriorly onto heel, extending laterally about 30% of maxillae length ( Fig. 21C, I ); coxae cuspules absent, thorn-like setae on prolateral face present ( Fig. 21C, I ); sternum length/width 1.21, central sternum with consistent covering of short setae, row of longer setae around posterior edges ( Fig. 21G–H ); posterior sigilla ovoid, central sternum to posterior sigilla length/ sternum length 0.26, posterior sigilla length/sternum length 0.13 ( Fig. 21G–H ); other sigilla small, round and lateral ( Fig. 21G–H ).

LEG I ( Fig. 21N–Q ). Leg I dark red-brown, lighter on distal metatarsus and tarsus, femur length 4.35, patella length 2.82, tibia length 3.30, metatarsus length 3.08, tarsus length 2.16, total length 15.71, leg I length/carapace length 3.04 ( Fig. 21N–O ); scopulae on distal metatarsus and tarsus ( Fig. 21N–O ); spine count Fe D 1, Fe PL 1, Pa PL 2, Ti PL 0, Ti RL 0, Me PL 0, Me RL 0, Ta 0 ( Fig. 21N–O ); tibia length/width [TIL/TID] 3.17, even width along length, spur present, intermediate triangular/digitiform, knuckle absent, megaspine angled at 19 degrees, length to distal face of spur/tibia length [TIS/TIL] 0.47, spur height/tibia width [TISH/TID] 0.51, megaspine length/tibia length 0.23 ( Fig. 21N–P ); metatarsus relatively straight, proximal excavation present, excavation concave with pronounced heel, heel sharp, excavation length/ metatarsus length [MIPEL/MIL] 0.47, metatarsus length/width [MIL/MID] 3.57 ( Fig. 21N–O, Q ).

PEDIPALP ( Fig. 21J–M ). Tibia length 2.54, width 0.91, length/width [PTL/PTD] 2.80, asetose depression present, depression length/palp tibia length [PDL/PTL] 0.57, retrolateral face with short, thorn-like setae along retrolateral edge of depression, ventral face with two elongate bristle-like setae below depression, prolateral face with two disto-ventral spines, disto-medial spine absent ( Fig. 21J–K ); patella prolateral face with 2 spines ( Fig. 21J–K ); cymbium with scopulae present distally ( Fig. 21J–K ); copulatory organ total length 1.36, length/palp tibia length 0.53 ( Fig. 21L–M ); bulb length/width 0.86 ( Fig. 21L–M ); embolus demarcated and roughly perpendicular to bulb, attenuate, tapering and curving relatively evenly to point, one slight bend, at about 0.4 of length, slight bend before tip, width at base/bulb width 0.25, embolus length/bulb length 1.86 ( Fig. 21L–M ).

Female (holotype, QMB S1248)

GENERAL ( Fig. 22A–L ). Body length 18.53, in moderate condition, colour significantly faded due to preservation, dorsal abdomen damaged.

DORSAL PROSOMA ( Fig. 22A, E–F ). Carapace length 6.85, width 5.49, length/width 1.25, clypeus to fovea length/carapace length 0.68, caput width/carapace width 0.77, carapace pallid, reflective setae present, fovea procurved, fovea width/carapace length 0.11 ( Fig. 22A, F ); chelicerae orange, rastellum absent or inconspicuous, chelicerae length/carapace length 0.49 ( Fig. 22A ); eye group rectangular, width/length 1.69, eye tubercle present ( Fig. 22E ).

ABDOMEN ( Fig. 22B, D ). Abdomen length 8.27, light brown, dorsal pattern absent, with erect bristle-like setae on posterior portion.

VENTRAL PROSOMA ( Fig. 22C, G–I ). Labium cuspules absent ( Fig. 22H ); maxillae heel distinct, cuspules present, count =about 116, extending posteriorly onto heel, extending laterally about 35% of maxillae length ( Fig. 22C, I ); coxae cuspules absent, thorn-like setae on prolateral face present ( Fig. 22C, I ); sternum length/width 1.22, central sternum with consistent covering of short setae, row of longer setae around posterior edges ( Fig. 22G–H ); posterior sigilla ovoid, central sternum to posterior sigilla length/ sternum length 0.26, posterior sigilla length/sternum length 0.10 ( Fig. 22G–H ); other sigilla small, round and lateral ( Fig. 22G–H ).

LEG I ( Fig. 22J–K ). Leg I pallid, femur length 4.88, patella length 3.25, tibia length 3.45, metatarsus length 3.10, tarsus length 2.21, total length 16.88, leg I length/carapace length 2.46; scopulae on distal metatarsus and tarsus; spine count Fe D 2, Fe PL 1, Pa PL 2, Ti PL 2, Ti RL 4, Me PL 3, Me RL 3, Ta 0; tibia length/width [TIL/TID] 2.96.

GENITALIA ( Fig. 22D, L ). Epigastric furrow unmodified ( Fig. 22D ); spermathecae with two vesicles each ( Fig. 22L ); lateral vesicle relatively straight, length 0.38, lateral vesicle length/genitalia width 0.28, length/width at base 0.82, crown un-demarcated ( Fig. 22L ); medial vesicle undulating anteriorly, medial vesicle length/genitalia width 0.49, length/width 4.84, medial vesicle length/lateral vesicle length 1.77 ( Fig. 22L ).

Distribution and natural history

Aname blackdownensis occurs on the Blackdown Tableland in central-eastern Queensland, in the Brigalow Belt South bioregion, located between Emerald and Rockhampton ( Fig. 6 ). It constructs an open, silk-lined burrow without silk outside of the entrance, often on an angle, and with a hidden secondary ‘wishbone’ entrance ( Fig. 6 ).

Figures

Fig. 1. Phylogeny and general map of eastern Australian Aname L. Koch, 1873. Left: IQ-TREE Maximum Likelihood phylogeny for the genus Aname with species groups sensu Rix et al. (2021) highlighted in grey, species complexes as defined in this study highlighted in colour, and showing the phylogenetic position of many of the species described herein, as well as some potential species (those with nicknames in quotation marks) that may turn out to be distinct, but did not meet our standards for description. Species groups that are not represented in eastern Australia are collapsed. Support values on the phylogeny show the results of 1000 ultrafast bootstrap replicates, and are only shown in cases where support was below 90%. Top-right: a map of subtropical and tropical eastern Australia, showing the locality of all Aname specimens included in this study. Bottom-right: a smaller phylogeny highlighting the higher-level relationships between species groups of Aname as recovered in this study.

Fig. 6. Aname pallida-complex species habitus images, distribution map, and burrow architecture. Points on the map represented by a star are type localities. Note that intraspecific variation occurs in both physical appearance and burrow architecture, and images shown here should be treated only as examples, not used for species diagnosis.

Fig. 21. Aname blackdownensis Raven, 1985, ♂ (QMB S118292). A. Cephalothorax, dorsal view. B. Abdomen, dorsal view. C. Cephalothorax, ventral view. D. Abdomen, ventral view. E. Ocular region. F. Fovea. G. Sternal sigilla, left view. H. Sternum and labium. I. Maxilla and coxae I–II, left view. J–K. Left pedipalp, full prolateral view (J), partial retrolateral view (K). L–M. Right bulb, prolateral view (L), dorsal view (M). N–Q. Left leg I, full prolateral view (N), full retrolateral view (O), retrolateral view of tibia (P), retrolateral view of metatarsus (Q). Scale bars: A–B, J, N =2 mm; L= 1 mm.

Fig. 22. Aname blackdownensis Raven, 1985, holotype, ♀ (QMB S1248). A. Cephalothorax, dorsal view. B. Abdomen, dorsal view. C. Cephalothorax, ventral view. D. Abdomen, ventral view. E. Ocular region. F. Fovea. G. Sternal sigilla, left view. H. Sternum and labium. I. Maxilla and coxae I–II, left view.J. Left leg I, prolateral view. K. Left leg I, retrolateral view. L. Internal genitalia, dorsal view. Scale bars: A–B, J =2 mm; L=1 mm.