Bidysderina niarchos, Platnick & Dupérré & Berniker & Bonaldo, 2013

Platnick, Norman I., Dupérré, Nadine, Berniker, Lily & Bonaldo, Alexandre B., 2013, The Goblin Spider Genera Prodysderina, Aschnaoonops, And Bidysderina (Araneae, Oonopidae), Bulletin of the American Museum of Natural History 2013 (373), pp. 1-102 : 97

Bidysderina niarchos , new species

Figures 642–652

TYPE: Male holotype taken in a pitfall trap at an elevation of 2130 m on the Stream trail in the Estación Biológica Yanayacu , 0 ° 35.955'S, 77 ° 53.341'W, Napo, Ecuador (Nov. 24–Dec. 2, 2009 (N. Dupérré et al., Niarchos Exped.), deposited in QCAZ ( PBI_OON 49532 );

ETYMOLOGY: The specific name is a noun in apposition taken from the expedition during which the type was collected.

DIAGNOSIS: Males resemble those of B. bifida in having a bifid conductor; the only male available has the conductor broken on both palps, but the size, shape, and angle of the more retrolaterally situated prong of the conductor are different (compare figs. 649 and 638); females can easily be recognized by the massive anterior expansion on the anterior genitalic process (fig. 652).

MALE (PBI_OON 49532, figs. 642, 645– 650): Total length 1.73. ALE separated by less than their radius. Leg spination (leg II missing): femur I p0-0-2, r0-1-0; tibia I v4-4- 1p; metatarsus I v2-1p-2. Embolus abruptly narrowed at more than half its length, where bent, conductor apparently bifid, distal branch broken on only available specimen.

FEMALE (PBI_OON 825, figs. 643, 644, 651, 652): Total length 3.07. ALE separated by less than their radius. Dorsal scutum covering 1/ 2 to 3/4 of abdomen length. Leg spination: femora: I p0-0-2, r0-1-1; II p0-0-2, r0-1-0; tibiae I, II v4-4-2; metatarsi I, II v2-1p-2. Anterior genitalic process massively expanded anteriorly.

OTHER MATERIAL EXAMINED: Ecuador: Napo: Stream trail, Estacio´ n Biolo´ gica Yanayacu, 0 ° 35.955'S, 77 ° 53.341'W, Nov. 24, 2009, elev. 2130 m (Niarchos Exped., AMNH PBI_OON 825), 1♀.

DISTRIBUTION: Ecuador (Napo).

Figures

Figs. 642–652. Bidysderina niarchos, new species, male (642, 645–650) and female (643, 644, 651, 652). 642. Sternum and mouthparts, ventral view. 643. Abdomen, ventral view. 644, 651. Genitalia, ventral view. 645. Left palp, prolateral view. 646. Same, ventral view. 647. Same, retrolateral view. 648. Left embolus, prolateral view. 649. Same, ventral view. 650. Same, retrolateral view. 652. Genitalia, dorsal view.