Australian Journal of
Taxonomy
Open-access, online, rapid taxonomy
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Material examined
Holotype
Australia: New South Wales: ♂, Craigend Farm, 5.8 km SSW. of the Oaks, 34°07′16″S, 150°31′55″E, 329 m, 10 July 2022, under bark of Eucalyptus eugenioides, F.S.B. Harvey, M.S. Harvey, M.E. Blosfelds, W. Inglis, H. Inglis (AM KS.131262).
Paratypes
Australia: New South Wales: 1 ♀, collected with holotype (AM KS.131263); 1 ♂, collected with holotype (WAM T158265).
Figures 7‒13. Synsphyronus inglisorum, sp. nov., male holotype (AM KS.131262): 7, carapace, dorsal; 8; left eyes, dorsal; 9, right pedipalp, dorsal; 10, left chela, retrolateral; 11, detail of chelal teeth, retrolateral; 12, left leg IV, retrolateral; 13, left rallum. Scale lines = 0.5 mm (Figures 7, 9, 10, 12); 0.1 mm (Figures 8, 11); 0.05 mm (Figure 13).
Diagnosis
Synsphyronus inglisorum most closely resembles those species of the genus that have eight trichobothria on the fixed finger and three on the movable finger (Figure 10), separate metatarsi and tarsi (Figure 12) and a constricted anterior eye (Figure 8): S. christopherdarwini Harvey, 2012, S. dorothyae Harvey, 1987, S. silveirai Harvey, 1987 from Australia and S. platnicki Harvey, 2020 from New Caledonia. It differs from these species as follows: from S. christopherdarwini, S. dorothyae and S. silveirai by the position of trichobothrium st which is slightly closer to b than to t in S. inglisorum (Figure 10) (much closer to sb than to t in christopherdarwini, and midway between b and t in S. dorothyae and S. silveirai); and from S. platnicki in the shape of the chelal hand which is broader in S. platnicki than in S. inglisorum (Figure 9).
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Description
Figures 1‒6. Synsphyronus inglisorum, sp. nov.: 1‒3, male holotype (AM KS.131262): 1, body, dorsal; 2, body, ventral; 3, cephalothorax, dorsal; 4‒6, female paratype (AM KS.131263): 4, body, dorsal; 5, body, ventral; 6, cephalothorax, dorsal. Scale lines = 1.0 mm.
Adults
Colour (Figures 1‒6): sclerotized portions generally dark red-brown; tergites II‒X with paired darker patches. Waxy epicuticle. Setae generally aligned perpendicularly from body, each seta quadricarinate. Most cuticular surfaces roughened, but not granulate.
Chelicera: with 5 setae on hand and 1 subdistal seta on movable finger, all setae acuminate; setae sbs and bs shorter than others; 2 dorsal lyrifissures and 1 ventral lyrifissure; galea of ♂ and ♀ with small distal bifurcation; rallum of 3 blades (Figure 13), distal and medial blade with 2 small spinules on leading edge, basal blade with 1 spinule, medial and basal blades much shorter than distal blade; serrula exterior with 17 (♂), 18 (♀) blades; lamina exterior present.
Pedipalp (Figure 9): trochanter with conical prolateral face, femur slightly procurved; trochanter 1.24–1.30 (♂), 1.25 (♀), femur 4.09‒4.11 (♂), 4.14 (♀), patella 2.62–2.74 (♂), 2.78 (♀), chela (with pedicel) 4.12‒4.24 (♂), 3.90 (♀), chela (without pedicel) 3.93‒3.99 (♂), 3.71 (♀), hand (without pedicel) 1.94 (♂), 1.83 (♀) × longer than broad, movable finger 1.04‒1.05 (♂), 1.04 (♀) × longer than hand (without pedicel). Fixed chelal finger with 8 trichobothria, movable chelal finger with 3 trichobothria (Figure 10): eb, esb and isb situated basally, est submedially, closer to isb than to et, et subdistally, ib and ist basally in diagonal row, and it subdistally, well posterior to et; b situated basally, st submedially, slightly closer to b than to t, and t subdistally; patch of microsetae present on retrolateral margin of fixed chelal finger near et. Venom apparatus present in both chelal fingers, venom ducts long, terminating in nodus ramosus slightly basal to et in fixed finger and slightly distal to t in movable finger. Chelal teeth: the distal teeth retrorse and acute distally, becoming rounded basally (Figure 11); fixed finger with 39 (♂), 43 (♀) teeth; movable finger with 31 (♂), 32 (♀) teeth; accessory teeth absent.
Carapace (Figures 3, 6, 7): 0.85‒0.87 (♂), 0.83 (♀) × longer than broad; anterior margin slightly indented medially; subtriangular; with 2 pairs of corneate eyes (Figure 8) situated ca. one-third carapace length from anterior margin; anterior eye constricted (Figure 8); with 4 setae near anterior margin and 6 (♂), 5 (♀) near posterior margin; with numerous lyrifissures; without furrows.
Coxal region: manducatory process rounded, with 3 apical acuminate setae, plus 5 (♂), 6 (♀) additional setae; medial maxillary lyrifissure situated submedially; chaetotaxy of coxae I–IV: ♂, 3: 4: 7: 9; ♀, 3: 4: 6: 12.
Legs (Figure 12): junction between femora and patellae I and II slightly oblique to long axis; junction between femora and patellae III and IV very angulate; femora III and IV much smaller than patellae III and IV; femur + patella of leg IV 3.68 (♂), 3.91 (♀) × longer than broad; metatarsi and tarsi separate and without tactile seta; subterminal tarsal setae arcuate and acute; arolium much longer than claws, not divided.
Abdomen: tergites II–X (♂), II–XI (♀) and sternites IV–X (♂), V‒X (♀) with median suture line (Figures 1, 2, 4, 5). Tergal chaetotaxy: ♂, 6: 8: 7: 7: 9: 8: 8: 8: 8: 6: 2: 2; ♀, 6: 6: 7: 8: 8: 10: 8: 8: 8: 6: 2: 2; uniseriate; all setae quadricarinate. Sternal chaetotaxy: ♂, 4: (0) 6 [4 + 2] (0): (0) 6 (0): 9: 10: 7: 6: 8: 6: 4: 2; ♀, 5: (0) 5 (0): (0) 9 (0): 7: 8: 8: 7: 6: 6: 4: 2; uniseriate; all setae quadricarinate except for setae on sternites II–IV and medial setae on sternites V–VI, which are acuminate. Spiracles without helix. Anal plates (tergite XII and sternite XII) situated within sternite XI, surrounded by slightly raised rim. Pleural membrane wrinkled-plicate; without any setae.
Genitalia: male: lateral apodeme laterally extended and distally broadened; anterior apodeme acute; a pair of acute dorsal apodemes; lateral rod very broad ventrally and with a blunt, anterior projection; ejaculatory canal atrium large and cup-shaped. Female: with one pair of lateral cribriform plates and 2 pairs of median cribriform plates.
Dimensions: male: holotype (AM KS.131262) followed by the paratype (when measured): Body length 2.77 (2.97). Pedipalps: trochanter 0.390/0.300 (0.390/0.315), femur 0.940/0.230 (0.965/0.235), patella 0.685/0.250 (0.655/0.250), chela (with pedicel) 1.420/0.345 (1.440/0/340), chela (without pedicel) 1.355 (1.355), hand (without pedicel) length 0.670 (0.660), movable finger length 0.700 (0.690). Carapace 0.805/0.930 (0.830/0.980); eye diameter, anterior 0.045, posterior 0.080. Leg IV: femur + patella 0.680/0.185, tibia 0.455/0.110, metatarsus 0.190/0.085, tarsus 0.185/0.075.
Female: paratype (AM KS.131263): Body length 3.12. Pedipalps: trochanter 0.410/0.335, femur 1.055/0.255, patella 0.750/0.270, chela (with pedicel) 1.600/0.410, chela (without pedicel) 1.520, hand (without pedicel) length 0.750, movable finger length 0.780. Carapace 0.890/1.070; eye diameter, anterior 0.045, posterior 0.080. Leg IV: femur + patella 0.800/0.205, tibia 0.530/0.120, metatarsus 0.210/0.095, tarsus 0.185/0.085.
Figures 7‒13. Synsphyronus inglisorum, sp. nov., male holotype (AM KS.131262): 7, carapace, dorsal; 8; left eyes, dorsal; 9, right pedipalp, dorsal; 10, left chela, retrolateral; 11, detail of chelal teeth, retrolateral; 12, left leg IV, retrolateral; 13, left rallum. Scale lines = 0.5 mm (Figures 7, 9, 10, 12); 0.1 mm (Figures 8, 11); 0.05 mm (Figure 13).
Remarks
The three specimens of Synsphyronus inglisorum were collected from under the bark of a mature thin-leaved stringybark tree Eucalyptus eugenioides in remnant bushland.
A COI barcode sequence of the paratype male specimen, WAM T158265, is available under the GenBank accession number OQ918547.
Etymology
The species epithet is in honour of the Inglis family, on whose property the specimens were collected, and in recognition of their efforts to rehabilitate sections of Craigend Farm for conservation purposes.