Pseudonemesia tabiskey , Rafael Prezzi Indicatti & Osvaldo Villarreal M., 2016

Rafael Prezzi Indicatti & Osvaldo Villarreal M., 2016, Pseudonemesia tabiskey, a new species of Pseudonemesia Caporiacco 1955 and new ultramorphological data for the Microstigmatinae (Araneae: Microstigmatidae), Journal of Natural History 50 (33), pp. 1-15: 3-13

publication ID 10.1080/00222933.2016.1196297

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scientific name

Pseudonemesia tabiskey

sp. nov.

Pseudonemesia tabiskey  sp. nov.

( Figures 1 – 10View Figure 1View Figure 2View Figure 3View Figure 4View Figure 5View Figure 6View Figure 7View Figure 8View Figure 9View Figure 10, 12)

Type material

Male holotype ( MHNLS II – 490) from La Cristalina, near Boconó, Trujillo, Venezuela, 9° 21'21 “ N, 70°19'35 “ W, 2510 m above sea level (asl), December 2006GoogleMaps  – March 2007, O.

Villarreal M., P. Delfín, N. Mendoza and J. Gil coll.GoogleMaps  Paratypes with the same data as holotype, female and male ( MHNLS II – 491); one male ( IBSP 115437View Materials).GoogleMaps 


Tabiskey  means ‘ the man with ten feathers ’. It is a Cuica term to describe the leader of the people, who guided them in peace or war and had the principal rule in important decisions. He was selected from among the priest ’ s sons.


Pseudonemesia tabiskey  sp. nov. differs from P. parva  and P. kochalkai  by the clavate setae on dorsal and lateral sides of the abdomen ( Figures 6View Figure 6 (a,b), 7(a,b), 9(b,c)). In addition, males of Pseudonemesia tabiskey  sp. nov. differ from the other two species of the genus by the presence of one short and apically rounded spine located retrolaterally on tibia I ( Figures 1View Figure 1 (g,h), 3(a – c), 6(f)).


Male (holotype). Carapace light brown with three longitudinal dark brown bands, one on each lateral side for length and one central only from eye tubercle to fovea ( Figure 6View Figure 6 (a)); legs yellowish dark with one subapical light brown mottles on femur I – II; femur III – IV with two, one sub-basal and one sub-apical; one basal light brown mottles on tibia, metatarsi and tarsi I – IV ( Figure 6View Figure 6 (a)). Cephalic and thoracic region with equal heights and more raised than eye tubercle. Abdomen dorsally dark brown ( Figure 6View Figure 6 (a,b)) and ventrally light yellow. Anterior and posterior book-lung apertures very small and rounded ( Figures 6View Figure 6 (c), 9(a)). Scaly cuticle flattened and highest at their distal ends on dorsal and lateral segments of all legs and palp ( Figures 2View Figure 2 (c – f), 3(a,b,d), 6(a,f)). Total length 2.73. Carapace 1.35 long, 1.20 wide. Abdomen 1.20 long, 0.73 wide. Fovea very narrow 0.12 and recurved ( Figure 6View Figure 6 (a)). Clypeus narrow, 0.05. Anterior eye row straight and posterior recurved ( Figure 6View Figure 6 (a)). Eye sizes: AME 0.11, ALE 0.08, PME 0.05 and PLE 0.07. Overall shape of eye group trapezoidal, wider than long. Chelicerae with nine teeth in one row on promargin, with ca. 15 basal smaller teeth. Rastellum absent ( Figures 6View Figure 6 (d), 8(a)). Cheliceral tumescence absent. Labium 0.13 long, 0.27 wide, without cuspule ( Figure 6View Figure 6 (d)). Cuspule on maxillae absent ( Figures 6View Figure 6 (d), 8(b)). Modified comb-shaped setae on prolateral maxillary border ( Figure 8View Figure 8 (b,d)). Serrula poorly developed with widely separated teeth and greatly flattened ( Figure 8View Figure 8 (c)). Sternum rounded 0.50 long, 0.70 wide ( Figure 6View Figure 6 (d)), domed. Sternal sigilla inconspicuous ( Figure 6View Figure 6 (d)). Palp measurements: femur 0.75/patella 0.50/tibia 0.52/cymbium 0.45/total 2.22; spination: femur d0-1-1-1-1-1-1, v0-1r-1r-2-2, tibia d0-1-0-0-0, v1 p-0-1r-2-1p-1-2, cymbium d2ap, p0-0- 0-1-0-0 ( Figure 2View Figure 2 (d – f)). Leg measurements: I: femur 1.20/patella 0.72/tibia 0.75/metatarsus 0.70/tarsus 0.40/total 3.77; II: 1.00/0.60/0.72/0.60/0.40/3.32; III: 0.90/0.50/0.55/0.82/0.50/3.27; IV: 1.27/0.60/1.12/1.30/0.54/4.83; spination: I: femur d0-1-1-1-1-1-1-0, v0-0-0-0-1r-0-1r, tibia v0-1r-1r-(1 = clasping spine, Figures 1View Figure 1 (g,h), 6(f)) -1p-0, metatarsus v2 ap; II: femur d0-1-1-1-1- 1-1, v1 p-1p-0-2-0-2, tibia v0-1r-0-1r-0-2ap, metatarsus v0-1r-1p-1r-0-2ap; III: femur d1-2-1- 1p-1-1r-1-2-0, v1 p-1p-2-1p-2, p1ap, patella d1-0-0, p0-0-1-0, r0-1-0, tibia d2-0-0-1-0, v0-1p- 1r-0-3ap, p0-1-0, metatarsus d0-0-1p-1r-1-1-1r-1p-0, v0-1r-0-2-0-0-3ap; IV: femur d0-1-1-0-1- 1-2-1, patella p0-1-0, r0-1-0, tibia d1r-1-0-0-1-0-1-0, v0-1p-0-1r-0-3ap, p0-1-0-0-0-1-0, r0-0-1- 0-0-0-1-0, metatarsus d0-1-0-0-0-1p-1r-1-1r-1p, v0-1r-1p-0-1r-0-3ap. Abdomen with four longitudinal erect clavate setal bands: two on dorsum with eight setae on each and one on each lateral with nine setae (two anterior longer). Clavate setae with sclerotized insertions on a mound ( Figures 6View Figure 6 (b), 9(b)). Abdomen with anterior shiny brown scutum ( Figure 6View Figure 6 (b)). Tarsi I – IV not flexible. Scopulae absent on all tarsi ( Figures 3View Figure 3 (a), 4(a)). STC with two rows of 5 – 6 teeth on tarsi I; 4 – 5 on tarsi II, 1, 3; 5, 3 on tarsi III and 3, 4; 5, 2 on tarsi IV. ITC well developed on all legs ( Figure 4View Figure 4 (a,b)). Tarsal organ rounded, elevated with 4 – 5 concentric ridges ( Figure 5View Figure 5 (a,b)). Trichobothrial bases corrugated, rounded and elevated ( Figure 5View Figure 5 (c,d)). Four spinnerets: two PMS vestigial entire 0.05 long, without spigots ( Figures 6View Figure 6 (e), 9(f)) and two PLS: basal, median and apical (domed) segments 0.09, 0.08, 0.06 long, respectively ( Figures 6View Figure 6 (e), 9(d)). PLS with one spigot on apex of medial article and five on apical ( Figure 9View Figure 9 (d,e)). Palpal tibia excavation and tegulum ( Figure 2View Figure 2 (a,b)) with low grooves. Palpal bulb oval with very short, blunt embolus, curved to ventral side ( Figures 1View Figure 1 (a – e), 2(a,b)).

Female (paratype MHNLS II –491). Coloration, book-lung apertures and cuticle as in male. Total length 4.00. Carapace 1.58 long, 1.36 wide. Abdomen 2.10 long, 0.86 wide. Fovea very narrow 0.16 and recurved. Clypeus narrow, 0.06. Anterior eye row straight and posterior recurved. Eye sizes: AME 0.06, ALE 0.09, PME 0.05 and PLE 0.08. Overall shape of eye group trapezoidal, wider than long. Chelicerae with nine teeth in one row on promargin, with 16 basal smaller teeth. Rastellum absent. Labium 0.13 long, 0.35 wide, without cuspule. Cuspule on maxillae absent. Serrula as in male. Sternum rounded 0.74 long, 0.70 wide, domed. Sternal sigilla inconspicuous. Palp measurements: femur 0.82/patella 0.64/tibia 0.60/tarsi 0.72/total 2.78; spination: femur d0-1-0-1-1-1-1, v0-0-0- 1r-0-2, tibia v1 p-0-2-0-2ap, tarsus p0-1-0. Leg measurements: I: femur 1.10/patella 0.70/ tibia 0.72/metatarsus 0.64/tarsus 0.45/total 3.61; II: 1.02/0.70/0.66/0.64/0.46/3.48; III: 0.86/ 0.52/0.62/0.80/0.50/3.30; IV: 1.40/0.72/1.14/1.48/0.62/5.36; spination: I: femur d0-1-1-1-0- 1-1-1-1-1, v0-0-0-1r-0-0-1r, tibia v0-1r-0-1r-0-0, metatarsus v0-1r-1r-0-2ap; II: femur d0-1- 1-1-1-1-1, v0-0-0-1r-0, tibia v0-1r-0-1r-0-3ap, metatarsus v0-1r-0-1r-0-0-2ap; III: femur d0- 1-0-1-1-1, v1 p-1p-0-1p-0-0, patella d1-1-0, r0-1-0, tibia d2-0-0-1-0, v0-1p-1r-0-0-3ap, p0- 1-0, metatarsus d0-0-2-0-0-1r-2, v0-1r-0-0-2-0-0-3ap; IV: femur d0-1-0-0-1-1-1-1r-1, v0-0- 0-1p-0, patella d1-0-0-0-0, p0-1-0, r0-1-0, tibia d1r-1p-0-0-0-1-1-0, v0-1p-0-0-1r-0-0-0-3ap, p0-1-0-0-0-1-0-0, r0-1-0-0-0-1-0, metatarsus d0-1-1r-0-0-1p-0-1r-0-1p-0-2-0, v0-1-1p-0-2- 1-0-0-3ap. Clavate setae and scutum on abdomen as in male. Palp with one row with nine prolateral teeth. Tarsi I – IV not flexible. Scopulae absent on all tarsi. STC with two rows of 9 – 10 teeth on tarsi I; 6 – 7 on tarsi II, 3 – 4 on tarsi III and 1, 5; 5, 3 on tarsi IV. ITC well developed on all legs. Trichobothria and tarsal organ as in male. Four spinnerets: two PMS vestigial entire 0.06 long, without spigots ( Figure 7View Figure 7 (a,b)) and two PLS: basal, median and apical (domed) segments 0.15, 0.12, 0.07 long, respectively ( Figure 7View Figure 7 (a,b)). Two bifid spermathecae ( Figure 1View Figure 1 (f)).


Males (n = 4): total length 2.73 – 4.85; carapace 1.35 – 1.50; abdomen 1.20 – 1.35. The height of pars thoracica can range from slightly more elevated than pars cephalica (almost equal height) to more elevated, as in Raven and Platnick (1981, fig. 51).

Additional material examined

Only one male used on SEM with the same data as holotype ( IBSP 115438View Materials).GoogleMaps 


The specimens were collected using pitfall traps. The containers were partially filled with a saturated saltwater solution, left in place for 5 – 7 days at 2500 m asl. All specimens came from a transitional forest between Andean rainforest (1800 m asl) and the paramo vegetation (> 2700 m asl) ( Figure 10View Figure 10 (a,b)). The average temperature was about 15 – 17°C and the annual rainfall, measured nearby, was> 900 mm. Other mygalomorph spiders collected in this area were Linothele sp. (Dipluridae) and Bolostromus sp. (Cyrtaucheniidae).


Known only from the type locality, in Venezuelan Andes: Trujillo state ( Figure 12View Figure 12).


Coleccion de Mastozoologia, Museo de Historia Natural de La Salle


Instituto Biologico de Sao Paulo


Sichuan Teacher's College


International Transit Centre


Prirodonamen Muzej Skopje