Ideobisium sonqo, Mau & Harvey & Harms, 2022

Mau, Sofía Amieva, Harvey, Mark S. & Harms, Danilo, 2022, New syarinid pseudoscorpions from Ecuador (Pseudoscorpiones, Syarinidae: Ideobisium and Ideoblothrus), European Journal of Taxonomy 821 (1), pp. 102-149 : 114-120

Ideobisium sonqo sp. nov.

urn:lsid:zoobank.org:act:907A362A-43E1-401C-973A-7AEAFDEDD22A

Figs 9–13

Diagnosis

Ideobisium sonqo sp. nov. differs from I. ecuadorense , I. kichwa sp. nov. and I. peckorum in the dimensions of the pedipalp (♂ I. sonqo sp. nov. holotype femur 2.56, patella 1.31, chela (with pedicel) 2.55, chela (without pedicel) 2.32, hand 1.29 and movable finger 4.25 times as long as broad; ♂ I. ecuadorense femur 2.62–2.90, patella 1.95–2.05, chela 2.25–2.50 and hand 1.35–1.40 times as long as broad and movable finger 0.85–0.86 times as long as hand; ♂ I. kichwa sp. nov. hand 4.44–4.63 times as long as broad; ♂ I. peckorum hand 1.4–1.5 times as long as broad). It differs from I. crassimanum and I. schusteri in the dimensions of the carapace (♂ I. sonqo sp. nov. 1.18–1.27 times as long as broad, ♀ carapace 0.56 mm long; ♀ I. crassimanum 0.64 mm long; ♂ I. schusteri 1.1 times as long as broad). It differs from I. susanae sp. nov. in the dimensions of the chelicera (♂ I. sonqo sp. nov. cheliceral movable finger 3.60–4.40, ♂ I. susanae sp. nov. 3.17–3.33 times as long as broad).

Etymology

‘Sonqo’ is the indigenous (Kichwa) word for ‘heart’. This species is named after the heart-shaped colour pattern on the carapace and honours the indigenous Kichwa culture of Ecuador. It is to be treated as a noun in apposition.

Material examined

Holotype ECUADOR • ♂; Napo Province, Tena, Colonso Chalupas Natural Reserve ; 00°54ʹ53.6ʺ S, 77°52ʹ40.598ʺ W; alt. 782 m; 8 Mar. 2020; E.E. Tapia, N. Dupérré and A.A. Tapia leg.; sifting litter and berlese traps; QCAZ.

Allotype ECUADOR • ♀; same collection data as for holotype QCAZ.

Paratypes ECUADOR • 5 ♂♂; same collection data as for holotype but 00°54ʹ33.084ʺ S, 77°53ʹ9.131ʺ W; 14 Mar. 2020; ZMH A0003688 to A0003692 .

Description

Male, adult (holotype; Fig. 9A–C )

COLOUR. Prosoma and opisthosoma light brown; pedipalps dark brown, femora and patella with a pattern of lighter brown circles, body length 1.33 mm.

PEDIPALP ( Figs 11E , 13A–C ). Setae on prolateral margin long and acicular; trochanter 1.36, femur 2.56, patella 1.31, chela (with pedicel) 2.55, chela (without pedicel) 2.32, hand 1.29 and movable finger 4.25 times as long as broad; fiXed chelal finger with 8 trichobothria, movable chelal finger with 4 trichobothria: eb and e sb situated medially on retrolateral face of hand, isb near base of finger, distance between isb, est a nd et very similar, et situated near tip of fiXed finger, est situated between e t and isb; trichobothrium b situated basally on movable finger, sb, st and t situated medially, close to each other; trichobothrium t shorter than others and lanceolate. Venom apparatus only present in fiXed finger, venom duct rather short. Teeth on both fingers rounded; fiXed finger with 34 small, movable finger with 37 juXtadentate teeth.

CEPHALOTHORAX ( Figs 11A, C , 12C–D ). Carapace 1.24 times as long as broad; rectangular in shape; 2 pairs of eyes, with corneate lens; epistome rounded; with 26 setae arranged 4:4:4:8:6; without furrows; two pairs of lyrifissures at either side of anterior margin; chaetotaXy of leg coXae I–IV 4:4:4:4:8, pedipalpal coxa with 4 setae and 2 apical setae.

CHELICERA ( Figs 11A–B , 12E–G ). Smooth; 1 dorsal lyrifissure between ls and is; 5 setae on hand, 1 seta on movable finger, setae is, ls and sbs longer than bs and es, gs situated subdistally on movable finger;

fiXed finger with 7–8 indistinct teeth, movable finger with ca 8 teeth; rallum with 7 dentate blades; serrula exterior with 24–25 blades; galea long and gently curved, without rami.

ABDOMEN ( Fig. 9A–C ). Tergites and sternites undivided; tergal chaetotaXy: 6:6:8:7:8:8:8:8:8:8:8:2; sternal chaetotaXy: 6:6:8:9:9:8:10:7:5:2; pleural membrane granulate anteriorly near cephalothoraX, granulo-striate posteriorly; without setae.

GENITALIA ( Fig. 13D ). Male genitalia with a small rounded ejaculatory opening, setal arrangement ca 5 setae situated anterior to opening.

LEGS ( Fig. 12A–B ). All legs with tarsus longer than metatarsus; femora slightly shorter than patella of leg I–II; scarcely granulate; femur + patella of leg IV 2 times as long as broad; legs III and IV with articulation between femur and patella slightly oblique; arolium shorter than claws, distally broadened and undivided; claws simple and not serrate.

Female, adult (allotype; Fig. 10A–C )

Same as holotype except body length 1.64 mm.

PEDIPALP. Trochanter 1.05, femur 2.27, patella 1.56, chela (with pedicel) 2.54, chela (without pedicel) 2.33, hand 1.27 and movable finger 3.77 times as long as broad; fiXed finger with 32 teeth, movable finger with 37 teeth.

CEPHALOTHORAX. 1.06 times as long as broad, with 27 setae arranged in pattern 4:6:4:7:6; chaetotaXy of coXae of legs I–IV: 6:4:6:8, pedipalpal coXa with 6 setae.

ABDOMEN. Tergal chaetotaXy: 6:6:7:9:10:9:9:9:10:8:5:2; sternal chaetotaXy: 8:8:9:10:9:9: 10:11:7:4:2.

GENITALIA ( Fig. 13E ). Female setal arrangement with four rows of setae arranged 2:7:8:6.

Variation of male paratypes (adults; n =5)

Same as holotype except body length 1.31–1.39 mm.

PEDIPALP. Trochanter 1.2–1.36, femur 2.41–2.69, patella 1.6–1.80, chela (with pedicel) 2.33–2.59, chela (without pedicel) 2.15–2.4, hand 1.29–2.55 and movable finger 3.87–4.71 times as long as broad.

CEPHALOTHORAX. 1.82–1.27 times as long as broad; carapace chaetotaxy: 24 setae arranged in pattern 4:4:4:6:6.

Female dimensions (mm, length/width of allotype)

Body length 1.64 mm. Pedipalps: trochanter 0.19/0.18, femur 0.41/0.18, patella 0.36/0.23, chela (with pedicel) 0.84/0.33, chela (without pedicel) 0.77/0.33, hand length 0.42, movable finger length 0.34. Chelicera: 0.33/0.18, movable finger length 0.22. Carapace: 0.55/0.52. Leg I: femur 0.11/0.09, patella 0.18/0.06, tibia 0.20/0.06, metatarsus 0.10/0.06, tarsus 0.17/0.05. Leg IV: femur 0.25/0.17, patella 0.23/0.17, tibia 0.31/0.09, metatarsus 0.12/0.07, tarsus 0.22/0.06.

Male dimensions (mm, length/width of holotype followed by range of five paratypes in parentheses) Body length 1.33 mm (1.31–1.39 mm). Pedipalps: trochanter 0.19/0.14 (0.18–0.19/0.14–0.15), femur 0.41/0.16 (0.40–0.43/0.16–0.17), chela (with pedicel) 0.79/0.31 (0.70–0.79/0.27–0.33), chela (without pedicel) 0.72/0.31 (0.65–0.73/0.27–0.33), hand length 0.40 (0.39–0.44), movable finger length 0.34 (0.28–0.35). Chelicera: 0.28/0.14 (0.27–0.30/0.12–0.15), movable finger length 0.21 (0.18–0.21). Carapace 0.52/0.42 (0.51–0.56/0.42–0.45). Leg I: femur 0.10/0.07 (0.10–0.13/0.07), patella 0.18/0.06 (0.18–0.20/0.05–0.06), tibia 0.20/0.06 (0.16–0.20/0.05–0.06), metatarsus 0.90/0.05 (0.08–0.10/0.05), tarsus 0.16/0.04 (0.15–0.18/0.03–0.05). Leg IV: femur 0.16/0.20 (0.19–0.21/0.19–0.20), patella 0.22/0.19 (0.22–0.27/0.19–0.20), tibia 0.31/0.09 (0.31–0.34/0.08–0.10), metatarsus 0.12/0.05 (0.11– 0.12/0.05–0.06), tarsus 0.20/0.05 (0.20–0.23/0.04–0.06).

Figures

Fig. 9. Ideobisium sonqo sp. nov., ♂, holotype (QCAZ). A. Habitus in dorsal view. B. Habitus in ventral view. C. Habitus in lateral view. Scale bars = 1 mm.

Fig. 10. Ideobisium sonqo sp. nov., ♀, allotype (QCAZ). A. Habitus in dorsal view. B. Habitus in ventral view. C. Habitus in lateral view. Scale bars = 1 mm.

Fig. 11. Scanning electron micrographs of Ideobisium sonqo sp. nov. A. Chelicera and anterior margin of carapace in dorsal view, showing lyrifissures. B. Chelicera, showing galea in ventral view. C. Carapace with asterisks next to setae. D. Genital area. E. Chela in retrolateral view, showing trichobothria. A–C, E: paratype, ♂ (ZMH A0003690); D: paratype, ♂ (ZMH A0003692).

Fig. 12. Ideobisium sonqo sp. nov. A. Leg I. B. Leg IV. C. Coxa. D. Carapace. E. Serrula exterior. F. Chelicera in dorsal view, showing trichobothria. G. Rallum. A–D, F: holotype, ♂ (QCAZ); E, G: paratype, ♂ (ZMHA0003690).Abbreviations: Fe = femur; Pa = patella; Ti = tibia; Me = metatarsus; Ta = tarsus. Scale bars: A–C = 0.25 mm; D = 0.50 mm; E, G = 0.05 mm; F = 0.1 mm.

Fig. 13. Ideobisium sonqo sp. nov. A. Chela in dorsal view. B. Chela in retrolateral view. C. Chela in ventral view, showing trichobothria. D. Genital area. E. Genital area. A–D: holotype, ♂ (QCAZ); E: allotype, ♀ (QCAZ). Scale bars: A–C = 0.25 mm; D–E = 0.10 mm.