Grymeus dharmapriyai n. sp.

Ranasinghe, U. G. S. L. & Benjamin, Suresh P., 2018, Taxonomic descriptions of nine new species of the goblin spider genera Cavisternum, Grymeus, Ischnothyreus, Opopaea, Pelicinus and Silhouettella (Araneae, Oonopidae) from Sri Lanka, Evolutionary Systematics 2 (1), pp. 65-80 : 65-66

Grymeus dharmapriyai n. sp. Figs 3 A–J, 4 A–E, 5 A–B

Type material.

Male holotype from Sri Lanka, North Western Province, Puttalam District, Wanathavilluwa, 08°10'15"N, 79°52'30"E, 30 m, litter; 24 May 2010; leg. N. Athukorala (IFS_Oon_007) (ZFMK).

Paratypes.

1 male and 3 females; same locality data (IFS_Oon_008-011) (ZFMK).

Other material examined.

2 males; Sri Lanka, Central Province, Kandy District, Gannoruwa FR, 07°16'56.85"N, 80°35'57.25"E, 575m, litter; 25 September 2013; leg. N. Athukorala et al. (IFS_Oon_156, 166). 1 male; Sri Lanka, Northern Province, Mannar District, surroundings of Vayu resorts-kitesurfing, Thaleimannar, 09°04'56"N, 79°42'4"E, 4m, litter; 03 April 2018; leg. S.P. Benjamin et al. (IFS_Oon_502).

Diagnosis.

The male of G. dharmapriyai n. sp. resembles to G. robertsi Harvey, 1987 by carapace without longitudinal rows of long, stout dorsal setae (Fig. 3A) and sperm pore situated in anterior third of abdomen (Fig. 3H), but differ in having the embolic accessory appendage with a dorsal, tooth-like projection (to) and a sharp, pointed embolus (Fig. 5A). Females are recognized by the stout and rounded receptaculum (Fig. 5B).

Etymology.

The species is named for the first author’s husband P. L. Dharmapriya.

Description.

Male: Total length 2.12 (Carapace, L: 0.84, W: 0.34. Abdomen, L: 1.28, W; 0.92). Coloration: uniformly orange brown colored. Carapace pyriform in dorsal view (Fig. 3A), pars cephalica gradually elevated and sudden elevation at middle (Fig. 3C), posterior circular shaped in dorsal view, but anterior rectangular shaped narrowed to less than 0.5 times its maximum width (Fig. 3A), posterior lateral spikes absent, lateral margin undulated. Clypeus straight in front view, margin unmodified, ALE separated from edge of carapace by about their diameter, setae absent. Six eyes, well developed (Fig. 3D), ALE largest, oval, separated each other by less than their diameter, posterior eyes circular, subequal, touching each other. Sternum heart-shaped (Fig. 3B), sharp margin visible, fused to carapace, radial furrows absent, decorated with rounded spots, lateral margin without indented extensions between coxae, posterior margin not extend. Cheliceral fangs unmodified, labium rounded, anterior invagination of sternum form a pouch (Fig. 3B). Abdomen elongated (Fig. 3G), evenly scattered with short setae, dorsal scutum covering full length of abdomen, no soft tissue visible from above, not fused to epigastric scutum, spinnerets not visible in dorsal view. Epigastric scutum sclertized, book lung covers pale brown, oval shaped, setaceous and not pointed (Fig. 3F). Postepigastric scutum long, fused to epigastric scutum (Fig. 3H). Spinneret scutum present as an incomplete ring. Leg spines absent, short brush like setae on all segments in leg I, II, III and IV. Genitalia: Palp of normal size, not strongly sclerotized, cymbium not extending beyond bulb, covered 2/3 of the bulb. Embolus (em), embolic accessory appendage (ma) and conductor (co) sharp and pointed, distal part of embolic accessory appendage bears a tooth-like projection (to) dorsally, slightly shorter than embolus, conductor short, curved ventrally (Fig. 5A).

Female: Total length 3.10 (Carapace, L:1.22, W:0.82; Abdomen, L: 1.80, W: 1.24). In general similar to males, larger than male, pars cephalica elevated from in lateral view, surface sides granulated (Figs 4A, 4C), lateral margin slightly undulated, sternum with hairs, not decorated with rounded spots (Fig. 4D), setae presence on chelicera, book lung covers small, narrowed, differ from male (Fig. 4B). Genitalia: Receptaculum (re) stout, rounded shaped, secretory sac (ssa) oval, pore field of receptaculum (pof) concentrated at middle of secretory sac, globular appendix (gap) short, less than 0.5 times the length of receptaculum, with an anterior paddle like sclerite (psc) and a nail like process (na), with lateral sclerites, with lateral apodemes (lap) (Fig. 5B).

Distribution.

Wanathavilluwa, Gannoruwa FR, Thaleimannar (Fig. 21).