Clubiona aberrans Dankittipakul

Dankittipakul, Pakawin, Tavano, Maria, Chotwong, Wimolwan & Singtripop, Tippawan, 2012, New synonym and descriptions of two new species of the spider genus Clubiona Latreille, 1804 from Thailand (Araneae, Clubionidae), Zootaxa 3532, pp. 51-63 : 55-57

Clubiona aberrans Dankittipakul sp. nov.

( Figs 6–10 , 14–16 )

Type material. Holotype: 3, THAILAND: Chiang Mai Province: Doi Suthep-Pui National Park , near Monthatarn Waterfall , 750 m, 11 February 1997, leg. P.J. Schwendinger ( MHNG) . Paratype: 1Ƥ, data as holotype ( MHNG) . THAILAND: Nakhon Ratchasima Province: 1Ƥ, Khao Yai National Park , 1,000 m, leg. P.J. Schwendinger ( MHNG) . Chachoengsao Province : 23, paddy field, 1985, leg. W. Vungsilabutr ( EZTH).

Diagnosis. Males of C. aberrans sp. nov. can be easily distinguished from other Clubiona males by the enlarged embolus with membranous base and spiral, sclerotized apex ( Figs 6–8 , 14–16 ). Females can be recognized by the heavily sclerotized epigynal plate, and by the thin and elongated insemination ducts with proximal chamber leading to spherical spermathecae and hyaline bursae ( Figs 9–10 ).

Etymology. The specific epithet, aberrans , reflects the unusual genital morphology which is deviating from other Clubiona species.

Description. Male (holotype): Total length 5.4; prosoma 2.4 long, 2.0 wide; opisthosoma 3.0 long, 1.9 wide. Eye sizes and interdistances: AME 0.14, ALE 0.16, PME 0.12, PLE 0.13, AME–AME 0.12, AME–ALE 0.06, PME–PME 0.28, PME–PLE 0.16. Leg formula 4213. Leg measurements. Leg I 7.10 (2.30, 0.84, 1.90, 1.26, 0.70), leg II 7.26 (2.14, 1.02, 2.00, 1.38, 0.72), leg III 6.06 (1.86, 0.78, 1.42, 1.40, 0.60), leg IV 9.46 (2.50, 1.04, 2.46, 2.68, 0.78). Spination. Leg I: femur p–1–1, d–1–1, r–1; tibia v–2–2 –1–1; metatarsus v–2–1; leg II: femur p–1, d1–1–1, r–1; tibia p–1, v–1–2 –1; metatarsus v–2; leg III: femur p–1–1, d–1–1–1, r–1–1; patella r–1; tibia p–1–1, r–1–1, v–1–1 –1; metatarsus p1–1, d–1–1, r–1–1, v–2–1 –1–2; leg IV: femur p–1, d–1–1–1–1, r–1–1; patella r–1; tibia p–1, r–1–1, v–1–1 –1; metatarsus p–1–1–1, d–1–1, v–2–1 –1.

Coloration and pattern. Prosoma in profile highest between PME and fovea. Carapace yellowish brown, with dark purple reticulum running between PME and fovea. Chelicerae dark reddish brown. Legs pale yellow, femora and tibiae distally with purple annulation occupying slightly less than half length of each segment. Opisthosoma ovoid; dorsum pale yellow, cardiac region with dark median band, flanked by disconnected lateral bands, posteriorly with series of purple chevrons. Venter pale, with broad, purple band running between epigastric furrow and spinnerets. Spinnerets dark brown on dorsal side.

Palp ( Figs 6–8 , 14–16 ). RTA distinctly broad at base, hook-shaped in lateral view, digitiform in ventral view. Cymbium with broad basal fold, its apex reaching approximately half-length of cymbium. Tegulum pyriform, slightly excavated on apico-prolateral side. Sperm duct sigmoid-shaped, with one apical loop. Embolus represented by large prong originating on meso-prolateral side of tegulum; basal part of embolus membranous; apical part sclerotized, more or less cylindrical, its apex obliquely bent, gradually narrowing, terminally becoming semitransparent flange. Conductor lightly sclerotized, flange-like, triangular in lateral view.

Female (paratype): Total length 6.6; prosoma 2.6 long, 1.8 wide; opisthosoma 4.0 long, 2.1 wide. Eye sizes and interdistances: AME 0.14, ALE 0.16, PME 0.15, PLE 0.16, AME–AME 0.12, AME–ALE 0.08, PME–PME 0.26, PME–PLE 0.16. Leg formula 4213. Leg measurements. Leg I 6.88 (1.86, 1.02, 1.84, 1.22, 0.94), leg II 7.78 (2.06, 1.10, 2.08, 1.56, 0.98), leg III 6.06 (1.80, 0.62, 1.32, 1.52, 0.80), leg IV 8.38 (2.28, 1.12, 2.02, 2.28, 0.68). Spination. Leg I: femur p–1, d–1–1–1, r–1; tibia v–2–2 –1–1; metatarsus v–2–1; leg II: femur p–1, d1–1–1, r–1; tibia p–1, v–1–1; metatarsus v–2; leg III: femur p–1–1, d–1–1, r–1–1; patella r–1; tibia p–1–1, r–1–1, v–1–1 –1; metatarsus p1–1, d–1–1, r–1, v–2–1 –1; leg IV: femur p–1, d–1–1–1, r–1–1; patella r–1; tibia p–1, r–1–1, v–2–1 –1; metatarsus p–1–1–1, d–2–1, v–1–1 –1.

Coloration. General appearance as in male except body lacking distinctive color pattern; prosoma less convex; opisthosoma more elongated.

Genitalia ( Figs 9–10 ). Epigynal region heavily sclerotized, broad, irregular-shaped, its margin clearly delimited, lateral margins provided with deep excavations where copulatory orifices situated underneath. Proximal part of insemination ducts enlarged, represented by chitinized chambers, ducts ascending anteriorly then curving at their half-length to form horizontal arch and descending posteriorly to connect with spherical spermathecae. Bursae hyaline, semi-transparent, situated posteriorly. Fertilization ducts acicular-shaped, originating on reniform bases, with short tubular ducts connected bases of fertilization ducts to spermathecae.

Natural history. Types of C. aberrans sp. nov. were collected by sweeping bushes and through the grasses in paddy field.

Distribution. Northern (Chiang Mai Province) and eastern (Chachoengsao Province) Thailand.

Figures

FIGURES 6 – 10. Clubiona aberrans sp. nov., holotype male (6 – 8) and paratype female (9 – 10). 6 – 8. Male palp: ventral (6), prolateral (8), retrolateral (7). 9. Epigyne, ventral. 10. Internal genitalia, dorsal. Abbreviations: GO, genital orifice; ID, insemination duct.

FIGURES 11 – 19. Clubiona spp. 11 – 13. C. digitata sp. nov., holotype male. 14 – 16. C. aberrans sp. nov., holotype male. 17. C. digitata sp. nov., paratype female. 18 – 19. C. filifera Dankittipakul, female. 11 – 16. Male palp: ventral (11, 14), prolateral (12, 15), retrolateral (13, 16). 17. Right internal genitalia, dorsal. 18. Epigyne, ventral. 19. Internal genitalia, dorsal.