Neotrops labarquei, Grismado & Ramírez, 2013

Grismado, Cristian J. & Ramírez, Martín J., 2013, The New World Goblin Spiders Of The New Genus Neotrops (Araneae: Oonopidae), Part 1, Bulletin of the American Museum of Natural History 2013 (383), pp. 1-150 : 90-93

Neotrops labarquei , new species

Figures 70–72 , 76A–B ; map 5

TYPES: Male holotype ( MACN-Ar 17989 PBI_OON 14891 ) and two female paratypes (MACN-Ar 17991 PBI_OON 14894, MACN-Ar 18059 PBI_OON 14904 respectively) from Uruguay: Rivera: Route 30 at the highest point of ‘‘Cuchilla’’ (low mountains), 344 m, - 31.14041 °, - 55.91986 °, Dec. 13, 2005, F. Labarque, A. Ojanguren, C. Mattoni col. Deposited in MACN-Ar.

ETYMOLOGY: The specific epithet is a patronym in honor of Facundo M. Labarque (MACN), one of the collectors of all known specimens of this species and also a true specialist ‘‘hunter’’ of oonopids and many other tiny spiders from the Neotropical region.

DIAGNOSIS: Among the species of the poguazu group, N. labarquei resemble N. lopardoae in having the anterior margin of the sternum straight (figs. 70E, 72E), but differs by the relatively shorter male bulb (figs. 71B–D, 76B) and longer stalk of the female anterior receptacle (fig. 76A).

DESCRIPTION: MALE (holotype, PBI_OON 14891, all legs missing). Total length 2.22. Cephalothorax: Carapace yellow, ovoid in dorsal view, pars cephalica strongly elevated in lateral view, anteriorly narrowed to less than half their maximum width; lateral margin straight; nonmarginal pars cephalica setae dark, needlelike, scattered; nonmarginal pars thoracica setae dark, needlelike, setae lost (bases remain); marginal setae dark, needlelike. Clypeus setae dark, needlelike. Eyes all subequal, all eyes circular; posterior eye row procurved from front; ALE separated by their radius to diameter, ALE-PLE separated by less than ALE radius, PME touching throughout most of their length, PLE-PME separated by less than PME radius. Sternum as long as wide, yellow, anterior margin unmodified, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension; setae sparse, evenly scattered (fig. 70E). Mouthparts: chelicerae, endites, and labium yellow; cheliceral setae dark, evenly scattered. Labium anterior margin indented at middle; with six or more setae on anterior margin. Endites distally not excavated, anteromedian part membranous, rebordered by a dark sclerotized lateral ridge and two medial darkened and forwarddirected blunt projections (fig. 70E). Abdomen: Dorsum light gray. Book lung covers ovoid. Postepigastric scutum yellow. Spinneret scutum absent. Dorsum setae dark, needlelike. Colulus represented only by setae. Genitalia (figs. 71B–D, 76B): Palp proximal segments yellow; femur normal size, two or more times as long as trochanter; cymbium yellow, ovoid in dorsal view, not fused with bulb; bulb white, more than two times as long as cymbium, slender, elongated, distal part with a translucent acute conductor and an additional prolateral-ventral projection, more sclerotized, with a slightly widened tip; embolus dark.

FEMALE (PBI_OON 14904). Total length 2.77. As in male except as noted. Cephalothorax: Carapace broadly oval in dorsal view. Eyes ALE, PME subequal, larger than PLE. Sternum precoxal triangles present; setae dark. Palp spines absent. Abdomen: Dorsum light gray. Postepigastric area setae dark, needlelike. Legs: Yellow; femur IV thickened, much larger than femora I–III, patella plus tibia I nearly as long as carapace. Leg spination: leg I: femora d0-1-1, pv0-0-1-1-0, tibiae v2-2-2-2-2-0, metatarsi v2-2-2-2; leg II: femora d0-1-1, pv0-0-1-1-0, tibiae v2-2-2-2-2- 0, metatarsi v2-2-2-2; leg III: femora d1-1, tibiae p1-1, d0-1-0, r0-0-1, v1ap, metatarsi p1-0-1, v1ap, r0-1-0; leg IV: femora d1-1-1, tibiae p1-0-1-0, r1-0-1-0, v0-1-0-2ap, metatarsi d1-0-1-1, r1-1-1-1, p1-1-1-1, v0-1-0-2ap. Genitalia (fig. 76A): Anterior receptacle long, with an elongated stalk and a mushroomshaped distal ‘‘head,’’ accessory glands located along entire stalk length; anterior and posterior ridges without evident locking mechanism, with wide V-shaped anterior margin, visible through the cuticle; uterus externus opening longitudinal.

OTHER MATERIAL EXAMINED: None.

DISTRIBUTION: Known only from the type locality, in Rivera Department, Uruguay (map 5).

Figures

Fig. 70. Neotrops labarquei, new species, male PBI_OON 14891. A. Habitus, dorsal view. B. Same, ventral view. C. Same, lateral view. D. Carapace, dorsal view. E. Cephalothorax, ventral view. F. Same, lateral view.

Fig. 71. Neotrops labarquei, new species, male PBI_OON 14891. A. Carapace, anterior view. B–D. Palp. B. Dorsal view. C. Prolateral view. D. Retrolateral view.

Fig. 72. Neotrops labarquei, new species, female (A, C–D, F–G, PBI_OON 14904; B, E, H, PBI_OON 14894). A. Habitus, dorsal view. B. Same, ventral view. C. Same, lateral view. D. Carapace, dorsal view. E. Cephalothorax, ventral view. F. Same, lateral view. G. Same, anterior view. H. Epigynum, ventral view.

Fig. 76. Neotrops spp. genitalia, cleared. A–B. Neotrops labarquei, new species, C–D, N. lopardoae, new species. A. Internal female genitalia, dorsal view (PBI_OON 14894). B. Male palp, retrolateral view (PBI_OON 14891). C. Internal female genitalia, dorsal view (PBI_OON 14796). D. Male palp, retrolateral view (PBI_OON 01861). Abbreviations: co, conductor; e, embolus; tr, transverse ridges; ue, uterus externus; asterisk (*) 5 additional distal apophysis.