Emertonella hainanica Barrion, Barrion-Dupo & Heong

Alberto T. Barrion, Aimee Lynn A. Barrion-Dupo, Josie Lynn A. Catindig, Sylvia C. Villareal, Ducheng Cai, Qianhua Yuan & Kong Luen Heong, 2016, NEW SPECIES OF SPIDERS (ARANEAE) FROM HAINAN ISLAND, CHINA, UPLB Museum Publications in Natural History 3, pp. 1-103 : 37-38

42. Emertonella hainanica Barrion, Barrion-Dupo & Heong , new species [ Figure 42 A-D]

FEMALE. Holotype female, total length 2.70 mm. Cephalothorax length 0.90 mm, width 0.80 mm., height 0.83 mm. Abdomen length 1.94 mm., width 1.89 mm., height 1.34 mm.

Carapace. Red, slightly longer than wide with parallel-sided cephalic barely 0.4x the greatest width of thoracic area. Cephalic area hump-like dorsally but quadrate and stone-like viewed laterally, highest along fovea and stiffly sloped to thoracic area. Chelicerae reddish brown with two small retromarginal teeth. Promarginal teeth reduced to four relatively thick whitish spine-like processes. Pedipalp uniformly light yellow. Maxillae reddish brown, widely separated, oblique and apices converged. Light reddish brown labium short and wider than long with convex apex. Sternum reddish brown, margins distinctly rebordered, posterior end broadly convex and 1.18x wider than long.

Eyes. In two rows of four. PE row slightly recurved and longer than strongly recurved AER. Eye diameter (mm.): AME (0.11)> ALE=PME (0.07)> PLE (0.06). Eye separation (mm): AME-AME (0.07), AME-ALE (0.09), PME-PME (0.08), PME-PLE (0.14). Clypeus height as long as one AME diameter.

Legs. Yellow except brownish coxae, trochanter and femora III and IV, strong spines absent but bristles present. Dorsobasal bristle on tibia I 2 x longer than its tibial diameter. Patella I apical bristle very long. Patella III and IV narrowed at basal half, broader towards apex. Legs I and II subequal in length. Femur I as long as pedipalp. Leg formula 4123.

Abdomen. Subglobose, black with white apical and posterior margins. Anterior margin cleft medially. Venter light yellow with reddish brown epigynal plate, water droplet-like brachial operculum, and yellow brown cribellum and spinnerets.

Epigynum on a large subquadrate sclerotized plate with a pair of water droplet-like "book lungs" laterally. Cleared epigynum bears a circular opening with a pair of connected hoods anteriorly. Spermathecae subglobular, slightly converging apically. Insemination duct looping V-shaped posteriorly.

MALE. Unknown.

Material Examined. Holotype female (coll. No. Da1), CHINA, Hainan Island, Danzhou, 4 April 2011, ATBarrion, JLACatindig and SCVillareal.

Diagnostic Features. This new species closely resembles in coloration, E. taczanowskii (Keyserling, 1886) but differs from the latter in terms of (1) shape of carapace, (2) color and banding pattern in the abdomen, (3) spermathecal shape, (4) cheliceral dentation, and (5) leg measurements.

Etymology.

The

specific

epithet

is

named

New Species of Spiders ( Araneae ) from Hainan Island, China after the type locality.

Figures

Figure 42 A-D. Emertonella hainanica Barrion, Barrion-Dupo & Heong, new species, holotype female (A), side view of cephalothorax (B), ventral view of epigynum (C) and spinnerets and tracheal spiracle (D).