Mesabolivar junin, 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 : 194-198

Mesabolivar junin , new species Figures 756–766

‘‘Peruvian pholcid, I.D. #2’’: Huber, 1999: figs. 8–11.

TYPES: Male holotype, 23 2♀ paratypes from Utcuyacu , Dept. Junin, Peru ; 1600– 2000 m elev., Feb.–Mar. 1948 (3 vials) (F. Woytkowski), in AMNH .

ETYMOLOGY: Named for the Peruvian state Junin. The specific name is a noun in apposition.

DIAGNOSIS: Distinguished from M. locono by the straight cheliceral apophyses (fig. 763); from M. huambisa and M. pseudoblechroscelis also by the shape of the procursus (figs. 757, 760–761); from M. exlineae and paraensis by the epigynum (shape of lateral apophyses and median pocket, figs. 764–765).

MALE (holotype): Total length 3.8, carapace width 1.7; leg 1: (12.4+0.7+11.9 +16.5, tarsus missing), tibia 2: 7.7, tibia 3: 5.5, tibia 4: 6.8; tibia 1 l/d: 69. Habitus similar to M. huambisa (cf. fig. 738); carapace light ochre brown, darker roundish spot medially, ocular area brown with light median stripe, with stronger saddle behind eyes than M. huambisa ; distance PME-ALE about 100% of PME diameter. Clypeus and sternum light ochre-brown; chelicerae ochrebrown with pair of strong, projecting frontal apophyses (figs. 762–763). Palps as in figs. 756–757, coxa with distinct retrolateral apophysis, trochanter with prominent ventral apophysis, femur with retrolateral apophysis proximally and ventral hump distally (figs. 757–758), procursus widened before tip, but more or less straight (figs. 757, 760–761), embolar division with terminal spine and membranous structures (fig. 759). Tarsal organ exposed. Legs ochre-brown, darker rings on femora (subdistally) and tibiae (proximally and subdistally); femora 3 significantly thicker than others; all legs without spines, without curved and vertical hairs; retrolateral trichobothrium of tibia 1 at 3%; tarsus 1 (paratype) with over 35 pseudosegments. Opisthosoma shape as in M. huambisa (cf. fig. 738), gray with blackish spots dorsally, genital plate light brown; gonopore without epiandrous spigots; ALS with only one piriform gland spigot each.

VARIATION: Tibia 1 in male paratypes: 10.7, 12.0; one male has on the opisthosoma also some white spots among the black spots.

FEMALE (paratypes): Total length 3.6, 4.1; tibia 1: 6.5, 6.8. In general very similar to male. Epigynum brown, with median pocket and pair of high, roundish apophyses laterally (figs. 764–765); dorsal view as in fig. 766.

DISTRIBUTION: Known only from type locality.

MATERIAL EXAMINED: PERU: Junin: Utcuyacu: types above.

Mesabolivar paraensis (Mello-Leitão, 1947) , new combination Figure 767

Coryssocnemis paraensis Mello-Leitão, 1947b: 161–162 , fig. 7.

TYPE: Female holotype from Breves , Pará, Brazil ; no date (F. O. Pickard-Cambridge), in BMNH (B.M.97.9.21.501-508), examined .

NOTES: It is not entirely clear whether this is actually the specimen described by Mello- Leitão (1947b). His drawing of the epigynum is quite different, and he mentions also the male, while the female holotype is the only specimen in the type vial.

It is possible that C. paraensis is a senior synonym on M. locono (of which only the male is known; see above).

DIAGNOSIS: Distinguished from close relatives ( M. exlineae , junin , huambisa ) by the shape of the epigynal pocket and the epigynal apophyses (fig. 767).

MALE: Unknown (see Notes above).

FEMALE (holotype): Total length 3.3, carapace width 1.3, carapace length 1.1, opisthosoma length 2.2; leg 1 missing, tibia 2: 3.5, tibia 3: 2.6, tibia 4: 3.9. Habitus as in M. huambisa (cf. fig. 738); carapace orangeochre, with slightly darker median spot anteriorly, ocular area ochre to light brown, clypeus ochre, sternum pale ochre, chelicerae light brown, legs ochre-yellow with dark rings on femora (subdistally) and tibiae (proximally and subdistally), most hairs on legs missing. Opisthosoma greenish-ochre with darker greenish spots dorsally. Epigynum light to dark brown, with distinctive median pocket and lateral apophyses (fig. 767).

DISTRIBUTION: Known only from type locality.

MATERIAL EXAMINED: BRAZIL: Pará: Breves: type above.

Mesabolivar exlineae (Mello-Leitão, 1947) ,

Figures

Figs. 756–763. Mesabolivar junin, n. sp., male. 756. Left palp, prolateral view. 757. Left palp, retrolateral view. 758. Left palpal femur, prolateral view. 759. Embolar division of left bulb, prolateral view. 760. Left procursus, retrolateral view. 761. Left procursus, prolateral view. 762 763. Chelicerae, frontal and lateral views. Scale lines: 0.5 mm (756–758), 0.3 mm (760–763).

Figs. 764–768. Mesabolivar spp. 764–766. M. junin, n. sp. 764 765. Epigynum, ventral and lateral views. 766. Epigynum, dorsal view. 767. M. paraensis (Mello-Leitão), female holotype: epigynum, ventral view. 768. M. exlineae (Mello-Leitão), female holotype: epigynum, ventral view. Scale lines: 0.3 mm.