Neotrops rubioi, new species

Figures 37– 39, 40E–F; map 1

TYPES: Male holotype (MACN-Ar 30117 PBI_OON 42559), two female and three male paratypes (MACN-Ar 28228 PBI_OON 43357) from Argentina: Misiones: Depto. Oberá, Campo Ramón: Refugio de Selva y Centro de Investigaciones Antonia Ramos (CIAR), Sector Casa de Piedra - 27.44605 ° -54.94118 °, 125 m, May 31, 2011, to June 03, 2011, Rubio G., Izquierdo M., Piacentini L., and Adilardi, R. Deposited in MACN-Ar.

ETYMOLOGY: The specific name is a patronymic in honor of Gonzalo D. Rubio (MACN), one of the collectors of the type series and many other oonopids in Argentina.

DIAGNOSIS: Males share with those of N. nigromaculatus and N. yunga the dorsal sclerotized stripe on the abdomen (figs. 37A, D, 38A), but differ by the orange coloration of the carapace, and by the small, gently curved, distally widened translucent conductor, which is not undulated (as in N. nigromaculatus) and is narrower than in N. yunga (figs. 38B–D, 40F). Females are very similar to those of N. nigromaculatus, but seem to have a more truncate tip of the anterior receptacle; the posterodorsal plate is relatively small, not reaching to the tip of the anterior receptacle (fig. 40E). This species can be also separated from N. nigromaculatus by its smaller size.

DESCRIPTION: MALE (holotype, PBI_OON 43357). Total length 1.32. Cephalothorax: Carapace orange, broadly oval in dorsal view (fig. 37D), pars cephalica slightly elevated in lateral view, anteriorly narrowed to less than half their maximum width; lateral margin straight; nonmarginal pars cephalica setae dark, needlelike; nonmarginal pars thoracica setae dark, needlelike; marginal setae dark, needlelike. Clypeus setae dark, needlelike. Eyes all subequal, ALE circular, PME oval, PLE oval; posterior eye row procurved from front; ALE separated by more than their 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 orange, longer than wide, anterior margin unmodified, posterior margin not extending posteriorly of coxae IV; setae sparse, evenly scattered (fig. 37E). Mouthparts: chelicerae, endites, and labium pale orange. Cheliceral setae light, evenly scattered. Labium anterior margin indented at middle; with six or more setae on anterior margin. Endites distally not excavated, anteromedian tip unmodified (fig. 37E). Abdomen: Dorsum white. Book lung covers elliptical. Abdominal dorsal stripe narrow, weakly sclerotized, pale orange, without color pattern, covering less than 1/2 of abdomen length, less than 1/4 abdomen width, very narrow, with irregular margins; middle surface smooth, sides smooth (figs. 37A, D, 38A). Postepigastric scutum pale orange. Spinneret scutum absent. Dorsum setae dark, needlelike. Colulus represented only by setae. Legs: Orange; femur IV not thickened, same size as femora I–III. Leg spination: leg I: femora pv0-0-1-1- 0, tibiae v2-2-2-2-2-0, metatarsi v2-2-2; leg II: femora d1, pv0-0-1-1-0, tibiae v2-2-2-2-2-0, metatarsi v2-2-2; leg III: femora d1-1, tibiae d1, p1-1ap, r1-1, v1ap, metatarsi d0-0-1, r0-1, v2ap; leg IV: femora d1-1, tibiae d0-1, p1- 1ap, v1ap, metatarsi d0-0-1, p1-1, r1-1, v1- 2ap. Trichobothria not examined. Genitalia: Palp proximal segments pale orange; femur normal size, two or more times as long as trochanter; cymbium yellow, ovoid in dorsal view, not fused with bulb; bulb pale orange, 1 to 1.5 times as long as cymbium, stout, tapering apically, conductor with distally expanded laminar extension; gently curved dorsally; embolus dark (figs. 38B–D, 40F).

FEMALE (paratype, PBI_OON 43357). Total length 1.74. As in male except as noted. Cephalothorax: Eyes ALE separated by their radius to diameter. Sternum pale orange, precoxal triangles present, setae dark. Labium elongated hexagon. Palp spines absent. Abdomen: Postepigastric area setae dark, needlelike. Legs: Patella plus tibia I nearly as long as carapace. Leg spination: leg I: femora d1-0-0, pv0-0-1-1-0, tibiae v2-2-2-2- 2-0, metatarsi v2-2-2; leg II: femora d1, pv0- 0-1-1-0, tibiae v2-2-2-2-2-0, metatarsi v2-2-2; leg III: femora d1-1, tibiae d1, p1, r1, v1ap, metatarsi p1-1, r1, v2ap; leg IV: femora d1-0- 1, tibiae d1, p1-1, r1-1, v1-1ap, metatarsi d1subap, p0-1, r1-1, v1-1ap. Genitalia (figs. 39H, 40E): Anterior receptacle relatively long, distally expanded, surpassing the anterior border of the posterodorsal plate.

OTHER MATERIAL EXAMINED: ARGENTINA: Same data as the types, 1♀ (MACN-Ar 28232 PBI _ OON 42038), 1♂ (MACN-Ar 28245 PBI _ OON 42072), 2♂, 2♀ (MACN-Ar 28244 PBI _ OON 42073), 1♂ (MACN-Ar 28231 PBI _ OON 43376); same locality, date and collectors, Sendero del bosque cercano a la casa, - 27.44445 ° - 54.94064 °, 100 m, 1♀ (MACN-Ar 28238 PBI _ OON 42070), 2♂, 1♀ (MACN-Ar 28241 PBI _ OON 42071). PARAGUAY: Alto Parana´: Ecole forestìere, échantillon du sol, 12 km S Puerto Presidente Stroessner (currently Ciudad del Este), June 25, 1984, C. Dlouhy, 1♂, 1juvenile (MHNG PBI _ OON 42067).

DISTRIBUTION: Misiones Province, in northwestern Argentina, and Alto Paraná Department, Paraguay (map 1).

NATURAL HISTORY: Unknown.