Anuvinda escheri ( Reimoser, 1934 )

Almeida-Silva, Lina M., Brescovit, Antonio D. & Griswold, Charles E., 2009, On the poorly known genus Anuvinda Lehtinen, 1967 (Araneae: Titanoecidae), Zootaxa 2266, pp. 61-68 : 65-66

Anuvinda escheri ( Reimoser, 1934)

Figs. 1–18

Titanoeca escheri Reimoser, 1934: 436 , fig. 7 (Holotype female, from Deccán Plateau, India, deposited in The Natural History Museum of Geneva, not examined); Lehtinen, 1967:214, fig. 441; Platnick, 2009.

Anuvinda escheri: Lehtinen, 1967: 214 fig. 441; Leech, 1972: 94 –95; Platnick, 2009.

Diagnosis. See generic diagnosis.

Description. Male ( Thailand, CAS 9025942). Coloration: carapace brown with cephalic area, chelicerae, labium, endites and first 1/3 of the sternum dark brown. Abdomen pale yellow. Femur I darker than the remaining articles and legs, which are yellowish brown. Total length: 7.6. Carapace: 4.1 long; 2.8 wide, 1.32 high. Abdomen: 3.5 long, 3.0 wide. Clypeus: 0.31 high. Eye diameter and interdistances: AME 0.12, ALE 0.18, PME 0.14, PLE 0.14; AME-AME 0.23, AME-ALE 0.17, ALE-PLE 0.1, PME-PLE 0.31, PME-PME 0.21, AME-PME 0.18. Chilum: undivided, smaller than outer border of AME and without setae. Chelicerae 1.68 long, with a promarginal tooth between two denticles and with two retromarginal denticles. Leg measurements: I: femur 3.65/ patella 1.55/ tibia 3.65/ metatarsus 3.5/ tarsus 1.55/ total 13.9; II: 3.55/ 1.55/ 3.25/ 3.2/ 1.4/ 12.95; III: 3.2/ 1.35/ 2.3/ 2.6/ 1.45/ 10.9; IV: 3.3/ 1.45/ 3.15/ 3.25/ 1.25/ 12.4. Leg formula: 1243. Leg spination: femur I p0-1-5sa; II p0-1-3sa; III 1 sa; tibia I v1 m-2p-1p-1r-1p-1p-2-2-2-1p; p 0-1d-1vsa or 1-1-0-1-0-1; r 1-1-1-0-0-1-0-0-1-0; II p 1-1-0-1-1; v1-2 -1m-2-1m-2-2-2-2- 1m or 1p-2-2-1m-1m-2-1m-2- 1m-2-2, r 1-1-0-1; III p 1-0-1, v 2-2, r 1-0-1; IV p 0-0-1-1, r 0-1-0-1 or 0-1-0-1-1, v 1-1 -0-1 or 1-1-0-2; Metatarsus III v 2-2 -1-2- 1m, r 2-1-1-1; p 0-1-0-0-1, d 2ap; IV: v 2-1 -2-2-1 or 2-2-2-2-2, p 0-1-0-1 or 0-1-0-1- 2, r 2 ap. Tarsal organ smooth and single metatarsal trichobothrium unique, partially smooth and partially striate as in Goeldia ( Griswold et al., 2005: 255; fig. 154H) and Titanoeca ( Griswold et al., 2005: 255; fig. 154I). Procurved setae on tibia and metatarsus I and II ( Fig. 9 ). Palp: prolateral face of femur with stridulatory files and medially dentate ( Fig. 5 ). Stridulatory files of femur distally with striation and proximally granulated ( Fig. 5 ). Patellar apophysis anteriorly projected and conical ( Figs. 1, 2 ). Distal modified setae on cymbium ( Figs. 1, 2, 4 ). Tegular process short and prolaterally projected ( Figs. 1, 3, 4 ). Narrow spermatic duct that bends in the middle of the tegulum ( Fig. 1 ).

Female ( Thailand, CAS 9025942). Coloration as in male. Total length: 10.1. Carapace: 4.5 long; 3.0 wide, 1.13 high. Abdomen: 5.5 long, 3.78 wide. Clypeus 3.4 high. Eye diameter and interdistances: AME 0.13, ALE 0.17, PME 0.14, PLE 0.15; AME-AME 0.28, AME-ALE 0.2, ALE-PLE 0.12, PME-PLE 0.3, PME-PME 0.22, AME-PME 0.16. Chilum as in male. Chelicerae 2.0 long, as in male ( Fig. 15 ). Leg measurements: I: femur 3.65/ patella 1.4/ tibia 3.25/ metatarsus 2.65/ tarsus 1.45/ total 12.4; II: 3.6/ 1.55/ 2.95/ 2.55/ 1.05/ 11.7; III: 3.1/ 1.45/ 2.45/ 2.3/ 1.05/ 10.35; IV: 3.4/ 1.5/ 3.0/ 2.8/ 1.2/ 11.9. Leg formula 1423. Leg spination: femur I: p 0-0-2sa-1ap or 0-1-2sa-1ap; II p 0-1-1; III p1sa; tibia I: r 1-0-0 or 0-1r-0; II v 1 r-0-0 or 0-0-1p, p 1ap; III: v 0-0-2, r 0-1-1sa, p 0-0-1; IV: p 1ap, r 1ap, v 1 sa; metatarsus I v2-1 p-1p-2-1p- 1m, p 1p, r 1ap; II: v 2-1 p-2p- 1m, p1 ap, r 1ap; III: v 2-1 p-2- 1m, r 1-0-1sa, p 1ap, d 0-1p-1p-2; IV v 2-1 r-2-2sa or 2-1m-1r-2-2sa, r 1ap, p 1ap or 0-0-1-0-1, d 2ap. Tarsal organ ( Fig. 16 ) as in male. Metatarsal trichobothrium ( Fig. 17 ) as in male. Female palpal claw with 14 teeth ( Fig. 18 ). Stridulatory file of palpal femur granulated, with modified setae ( Figs. 10– 12 ). Pedipalp with modified setae on the prolateral face of tibia and tarsus. Chelicerae with stridulatory files ( Fig. 13 , 14 ) composed of setae with enlarged bases. Epigynum: external plate wider than long, with an anterior pair of muscular insertions and sinuous lateral anterior depressions ( Fig. 6 ). Atrium partially covered by membranous tissue and inner border with a long rim, near the copulatory openings ( Fig. 6 ). Copulatory ducts with enlarged bases.

Variation. Length (7 Ƥ): total: 5.8–11.9; carapace: 2.8–5.2; femur I: 2.35–4.15.

Natural history. According to the labels the spiders were caught on scrubby vegetation, over stones and near rivers in the open areas during daylight. Some specimens were caught inside a cave.

Material examined. CHINA. Yunnan. 20km N Liuku at Gan Ma Zhai (26º 01’N 98º 51’E), 1 Ƥ, 21.X.1998, C. L. Long col. ( CAS). THAILAND. Soppong. Tham Lot Cave (19º 30’N 98º 15’W), 1 3, 3 Ƥ, 5– 11/III/1990. V. & B. Roth col. ( CAS 9025942; IBSP 126692). LAOS. Luang Prabang. 360m SE Luang Prabang, Nam Khan, Ban Khon Why (N 19o 44’ 53,3”, E 102o 14’19”) 15 im., 2 Ƥ, 24.III.2007, P. Jäger col. ( FMS); 325m Luang Prabang, Nam Kham, Ban Thin (N 19o 51’50,8” E 102o 15’ 03,7”), 7 im., 3 Ƥ, 23.III.2007, P. Jäger col. ( FMS; IBSP 126693).

Figures

FIGURES 1 – 5. Anuvinda escheri (Reimoser, 1934), male, from Thailand (CAS 9025942). 1. Left palp, ventral view; 2. Ditto, dorsal view; 3. Detail of tegular process, frontal view; 4. Left palp, retrolateral view; 5. Ditto, detail of patella and tibia, ventral view. C—cymbium; CF—cymbial furrow; E—embolus; MA—median apophysis; MLT—median lobe from tibial apophysis; MS—modified setae; PA—patellar apophysis; PLT—prolateral lobe from tibial apophysis; RLTretrolateral lobe from tibial apophysis; S 1 — stridulatory area with striation; S 2 — stridulatory area with denticles; S 3 — granulated stridulatory area; ST—subtegulum; TF—tegular furrow; TP—tegular process.

FIGURES 6 – 7. Anuvinda escheri (Reimoser, 1934), female, from Thailand (CAS 9025942). 6. Epigynum, ventral view; 7. Vulva, dorsal view. bCD—base of the copulatory duct; CD—copulatory ducts; CO—copulatory opening; FDfertilization duct; Mi—muscular impression; R—epigynal rim; S—spermathecae; Sd—sinuous depression; Ud—Ushaped depression.

FIGURES 8 – 9. Anuvinda escheri (Reimoser, 1934), from Thailand (CAS 90255942). 8. Male leg II, metatarsus, showing reduced size of spines. 9. Male, leg I, tibia and metatarsus, showing details of the procurved setae, retrolateral view.

FIGURES 10 – 13. Anuvinda escheri (Reimoser, 1934), female, from Thailand (CAS 9025942). 10. Female, palpal femur, prolateral view; 11. Ditto, details of stridulatory file; 12. Ditto, stridulatory setae; 13. Female, chelicerae, retrolateral view. Scale bars: 10 = 100 μm; 11, 12, 13 = 10 μm.

FIGURES 14 – 18. Anuvinda escheri (Reimoser, 1934), female, from Thailand (CAS 9025942). 14. Female, right chelicerae, showing stridulatory setae; 15. Ditto, fang and furrow; 16. Ditto, leg I, tarsal organ, dorsal view; 17. Ditto, leg I, trichobothrium, dorsal view; 18. Ditto, pedipalp, tarsal claw. Scale bars: 14, 15 = 100 μm; 16, 17, 18 = 10 μm.