Neoxyphinus xyphinoides ( Chamberlin and Ivie, 1942 )

Abrahim, Naiara, Brescovit, Antonio D., Rheims, Cristina A., Santos, Adalberto J., Ott, Ricardo & Bonaldo, Alexandre B., 2012, A Revision of the Neotropical Goblin Spider Genus Neoxyphinus Birabén, 1953 (Araneae, Oonopidae), American Museum Novitates 2012 (3743), pp. 1-76 : 20-22

Neoxyphinus xyphinoides ( Chamberlin and Ivie, 1942)

Figures 55–64; map 2

Dysderina xyphinoides Chamberlin and Ivie, 1942: 7 , figs. 5–7 (male holotype from Kartabo , British Guyana, 1924, PBI_OON 14576, in AMNH, examined).

Neoxyphinus xyphinoides ; Birabén, 1953: 458.

DIAGNOSIS: This species can be readily distinguished by the presence of three pairs of short carapace spikes and a strongly modified sternum, with a small concave pit in the posterior half (fig. 57). It differs from the only other known species with six spikes ( N. axe ) by the carapace devoid of blunt tubercles and with much smaller spikes (figs. 55, 56).

MALE (holotype): Total length 2.05. Carapace dark red-brown, posterolateral surface with 3 pairs of small spikes, surface of elevated portion of pars cephalica and sides smooth, lateral margin with blunt tubercles. Clypeus margin unmodified, straight in frontal view. ALE separated by less than their radius. Sternum longer than wide, orange-brown, median concavity a deep pit in posterior half of sternum, microsculpture absent, radial furrows deep, smooth, furrows II–III and III–IV touching median pit, anterior margin with continuous transverse groove, few marginal setae, originating from small tubercles. Chelicerae, endites, and labium orangebrown. Book lung covers large, elliptical. Pedicel tube long. Dorsal scutum dark red-brown; surface of middle and sides smooth, anterior half without projecting denticles. Postepigastric scutum red-brown. Legs orange-brown; Spine formula: tibia I v4-4-1, metatarsus I 2-2-1; tibia II v2-4-0, metatarsus II v2-0-2. Genitalia: sperm pore situated at level of anterior spiracles. Map 2. Records of Neoxyphinus hispidus (squares), N. gregoblin (circle) and N. xyphinoides (triangle). Figs. 55–64. Neoxyphinus xyphinoides (Chamberlin and Ivie) , male. 55. Habitus, dorsal view. 56. Same, lateral view. 57. Sternum and mouthparts, ventral view. 58. Abdomen, ventral view. 59. Left palp, prolateral view. 60. Same, ventral view. 61. Same, retrolateral view. 62. Left palp, embolus, prolateral view. 63. Same, ventral view. 64. Same, retrolateral view.

Palp proximal segments, cymbium, and bulb yellow. Embolus with both prolateral prong and prolateral lamella (figs. 59–64).

FEMALE: Unknown.

DISTRIBUTION: Know only from type locality (map 2).

MATERIAL EXAMINED: Only the holotype.