Holotype 1♀ (IFS_SAL_306), Sri Lanka, North Central Province, Anuradapura District, Mihintale Sanctuary, 123 m, 08°21'10.60"N, 80°30'14.54"E, hand collection, 06-VII-2013, leg. SP Benjamin et al.

The species name a noun in apposition, is derived from the Latin orbis and refers to the coiled CD.

This species is distinguishable from P.alborea, P.brunne, P.jesudasi, and P.flavumi by having coiled CD (Figs 12G, H, 13A, B) and from P.flavoviri by reniform spermathecae, CD with 2–3 coils and absence of sclerotised structures originating from CD.

Female. In ethanol preserved specimens, prosoma orange in colour with black blotches on the ocular region (Fig. 12E). PLE surrounded with black scales. Posterior region of prosoma with devoid of any markings (Fig. 12E). Posterior margin of prosoma slightly truncated. Pale yellow sternum oval in shape.

Abdomen yellow, oval in shape as long as prosoma. Dorsum devoid of any longitudinal stripes, as in other congeners, two pairs of yellowish orange dots at the middle of abdomen (Fig. 12E). Ventrum pale yellow without any markings (Fig. 12F). Spinnerets pale yellow.

Epigynum with poorly sclerotised PEB. Spermathecae comparably large, thick walled and reniform with head-like structure (Figs 12G–H, 13A–B). CD twisted with 2–3 coils, ends in a duck-neck-shaped diverging curve leading to CO. Fertilisation ducts lanceolate, arising from anterolateral wall of receptacles (Figs 12H, 13B).

Measurements.TL 5.29, PL 2.28, PW at PLE 1.88, AL 3.35, AW 1.48. Eye field: diameter of AME 0.44, PLE 0.15, ALE 0.25, PME 0.01, PME-PME 1.10, PLE-PLE 1.15, ALE-PME 0.03, ALE-PLE 0.68. Leg I: TR 0.27, FM 1.15, PT 0.78, TB 1.40, MT 0.93, TA 0.33; Leg II: TR 0.27, FM 1.30, PT 0.40, TB 0.77, MT 0.66, TA 0.45; Leg III: TR 0.25, FM 1.22, PT 2.25, TB 0.87, MT 0.93, TA 0.43; Leg IV: TR 0.25, FM 1.00, PT 0.55, TB 1.10, MT 1.32, TA 0.47.

Male. Unknown.