Blancoa piacoa, HUBER, 2000

HUBER, BERNHARD A., 2000, New World Pholcid Spiders (Araneae: Pholcidae): A Revision At Generic Level, Bulletin of the American Museum of Natural History 2000 (254), pp. 1-348 : 332-334

publication ID	https://doi.org/ 10.1206/0003-0090(2000)254<0001:NWPSAP>2.0.CO;2
persistent identifier	https://treatment.plazi.org/id/03ACD276-8E1F-FEA4-FF75-FD5F41F139B2
treatment provided by	Felipe
scientific name	Blancoa piacoa
status	sp. nov.

Treatment

Blancoa piacoa , new species Figures 32 View Figs , 131 View Figs , 182 View Figs , 1333–1344

TYPES: Male holotype, 14 3 2♀ paratypes (2 vials) from 11 km W Piacoa, Dept. Delta Amacuro, Venezuela ; ‘‘seasonal humid forest, on sand, malaise,’’ Aug. 14–31, 1987 (S. & J. Peck), in AMNH .

ETYMOLOGY: Named for the city close to the type locality. The specific name is a noun in apposition.

DIAGNOSIS: Distinguished from B. guacharo by the unmodified basal segments of the chelicerae, the hook-shaped apophyses on the cheliceral fangs (fig. 1340), the transparent procursus (fig. 1341), and the relatively simple, spirally curved bulbal apophysis (figs. 1337–1338).

MALE (holotype): Total length 1.2, carapace width 0.63; leg 1: 10.1 (2.3+0.3+2.7 +3.9+0.9), tibia 2: 1.6, tibia 3: 1.1, tibia 4: 1.4; tibia 1 l/d: 52. Habitus as in fig. 1333; carapace ochre, darker medially, with distinct thoracic groove; six eyes in two triads on moderately elevated, light brown ocular area (figs. 1334–1335); distance PME-ALE about 60% of PME diameter. Clypeus brown; sternum pale ochre-yellow, without anterior humps (fig. 1339); basal segments of chelicerae unmodified, but fangs with hook-shaped apophyses basally (figs. 32, 1340). Palps as in figs. 1337–1338, pale ochre to brown, retrolateral coxal apophysis blunt, femur with retrolateral apophysis basally and prolateroventral bulge distally (fig. 1336), tibia almost globular (fig. 1338); procursus simple, almost transparent (fig. 1341); bulb with strong, slightly spiraling apophysis, with short subdistal branch (fig. 1338). Tarsal organ exposed. Legs yellowish-ochre, with slightly darker rings on femora (subdistally) and tibiae (distally); without spines and curved hairs; with few vertical hairs on tibiae; retrolateral trichobothrium of tibia 1 at 21%; tarsus 1 with ~ 15 pseudosegments. Opisthosoma gray, with some dark spots dorsally; gonopore without epiandrous spigots (fig. 131); ALS with only one piriform gland spigot each (fig. 182).

VARIATION: Tibia 1 in 9 other males: 2.2– 2.8 (x¯ = 2.52).

FEMALE (paratype): Total length 1.4; tibia 1: 1.7. In general very similar to male. Epigynum brown, slightly protruding but simple (figs. 1342–1343), internal genitalia apparently with median receptacle (fig. 1344).

DISTRIBUTION: Known from northeastern Venezuela (Delta Amacuro, Monagas, Bolívar).

MATERIAL EXAMINED: VENEZUELA: Delta Amacuro: 11 km W Piacoa : types above. Monagas: 15 km N Maturín, ‘‘flood plain forest,’’ July 19–31, 1987 (S. & J. Peck), 53 (2 vials) in AMNH ; 27 km SW Caripe , 300 m elev., ‘‘forest over coffee,’’ July 19–31, 1987 (S. & J. Peck), 13 in AMNH. Bolívar: Guri (S Puerto Ordaz), ‘‘fairly wet forest, mostly lowland evergreen type,’’ July 3–15, 1998 (H. & A. Howden), 23 in AMNH .

Blancoa guacharo , new species Figures 1345–1355

TYPE: Male holotype from Caripe (10°12̍N, 63°29̍W), Cueva Guacharo, Dept. Monagas, Venezuela ; 750 m elev., ‘‘forest over coffee,’’ July 20–31, 1987 (S. & J. Peck), in AMNH .

ETYMOLOGY: Named for the type locality ( guacharo is Spanish for ‘‘nightingale’’). The specific name is a noun in apposition.

DIAGNOSIS: Distinguished from B. piacoa by the club-shaped modified hairs frontally on the male chelicerae (fig. 1352), the ribbon-shaped, slightly curved procursus (fig. 1350), and the complex bulb with several distal structures (figs. 1354–1355).

MALE (holotype): Carapace width 0.87; leg 1: 22.7 (5.4+0.4+5.5+9.7+1.7), tibia 2: 3.2, tibia 3: 2.3, tibia 4: 2.8; tibia 1 l/d: 71. Prosoma as in figs. 1345–1347; carapace ochre-yellow, light brown around ocular area and median line, thoracic groove distinct; oc- ular area orange-brown with brown marks, AME reduced to pair of black spots, apparently without lenses (fig. 1346); distance PME-ALE about 60% of PME diameter. Clypeus with pair of brown marks; sternum light ochre, without anterior humps; chelicerae ochre-yellow, with pair of dark brown, club-shaped modified hairs and pair of light brown apophyses (figs. 1352–1353). Palps as in figs. 1348–1349; light to dark orangeochre, retrolateral coxal apophysis blunt, femur with proximal and distal apophyses (fig. 1351), tibia globular; strong hairs distally on tibia and cymbium (fig. 1349); procursus ribbon-shaped, slightly curved (fig. 1350); bulb complex distally (figs. 1354–1355). Legs light ochre-yellow, with very faint darker rings on femora and tibiae (subdistally); without spines, without curved and vertical hairs; retrolateral trichobothrium of tibia 1 at 3%; tarsus 1 with ~ 25 pseudosegments. Opisthosoma missing.

FEMALE: Unknown.

DISTRIBUTION: Known only from type locality.

MATERIAL EXAMINED: VENEZUELA: Monagas: Caripe: type above.