Nyikoa limbe Huber, 2007, n. sp.
Creators: name: Huber, Bernhard A.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Nyikoa
Nyikoa limbe

description: Nyikoa limbe, n. sp.
(Figs. 2–3, 13–31)
Type material. Male holotype from Cameroon, Southwest Province, Fako Division, Limbe Subdivision, 1.4 km NE of Etome (04°03.0’N, 09°07.6’E), ~ 400 m a.s.l., January 13–19, 1992 (S. Larcher, G. Hormiga, J. Coddington, C. Griswold, C. Wanzie), in USNM.
Etymology. The species name is derived from the type locality, and is used as a noun in apposition.
Diagnosis. Small but long-legged six-eyed pholcine (proximo-lateral cheliceral apophyses!), easily distinguished from other known pholcines by unique and extremely complex procursus (Fig. 14). Further distinguished from other African six-eyed pholcines by combination of following characters: male cheliceral apophyses without modified hairs (Fig. 15); epigynum without scape (Fig. 16); prolateral attachment of bulb (Fig. 13); absence of retrolateral notch proximally on cymbium (Fig. 14); widely spaced eye triads (Fig. 2); presence of several ALS spigots (versus two) (Fig. 26); shift of tibia-cymbium joints to prolateral (rather than to retrolateral) side (Fig. 13).
Male (holotype). Total length 1.7, carapace width 0.60. Leg 1: 14.0 (3.4 + 0.3 + 3.6 + 5.4 + 1.3), tibia 2: 2.2, tibia 3: 1.3, tibia 4: 2.4. Tibia 1 length/diameter (L/d): 50. Habitus as in Figs. 2, 3; coloration mostly pale ochre-yellow, abdomen pale ochre-gray; distance PME–PME 175 µm; diameter PME 70 µm; distance PME– ALE 15 µm; AME missing. Sternum wider than long (0.44/0.38), unmodified. Clypeus unmodified; chelicerae with pair of simple frontal apophyses (Figs. 15, 24), without stridulatory ridges. Palps as in Figs. 13, 14; coxa unmodified, trochanter simple, without apophysis, femur, patella and tibia widened but otherwise unmodified; procursus distinctive, highly complex (Figs. 18–21), bulb with bifid projection, one part membranous (embolus?), other part thin blade-like; palpal tarsal organ capsulate (Fig. 22). Legs without spines and curved hairs, few vertical hairs; retrolateral trichobothrium of tibia 1 at 12%, prolateral trichobothrium apparently absent on tibia 1, present on other legs; tarsus 1 with>10 pseudosegments, but only distally a few visible in dissecting microscope; tarsus 4 with complex comb-hairs ventrally (Fig. 23). Male gonopore without epiandrous spigots (Fig. 25). ALS with one widened, one pointed, and five cylindrically shaped spigots (Fig. 27).
Variation. Tibia 1 in other males: Cameroon (type locality, N=9): 3.4–3.8 (mean: 3.54), Ghana (N=20): 3.0–3.7 (mean: 3.33), Congo DR (N=20): 3.2–3.7 (mean: 3.45). No variation seen in genitalia and chelicerae.
Female. In general similar to male. Tibia 1: Cameroon (N=6): 3.2–3.4 (mean: 3.27), Ghana (N=22): 2.9– 3.3 (mean: 3.08), Congo DR (N=20): 3.0–3.4 (mean: 3.21). Epigynum very inconspicuous from outside, barely distinguishable from surrounding cuticle but somewhat protruding, with pair of pockets close together (Fig. 29); with round pore plates and complex ‘valve’ separating uterus externus from uterus internus (Figs. 17, 31).
Distribution. Apparently widely distributed, currently known from three localities in Ghana, Cameroon, and Congo DR (Fig. 74).
Material examined. CAMEROON: Southwest Province, Fako Division, Limbe Subdivision, 1.4 km NE of Etome: type above, together with 7ɗ4Ψ, in USNM. Same data, 3ɗ2Ψ in CAS. GHANA: Kakum forest (5°20’N, 1°23’W), fogging in secondary forest, Nov. 19, 2005 (R. Jocqué, D. De Bakker, L. Baert), ~25ɗ29Ψ in MRAC (217.690); same data but various dates (Nov. 15–24, 2005), ~8ɗ8Ψ in MRAC (217.689, 217.721, 217.730, 217.734, 217.738); same data but primary forest, various dates (Nov. 14–25, 2005), ~22ɗ37Ψ in MRAC (217.693, 217.702, 217.709, 217.718, 217.736). CONGO DR: Bas-Congo, Mayombe, Luki Forest Reserve, fogging in primary rainforest, Nov. 4–13, 2006 (D. De Bakker, J. P. Michiels), ~27ɗ54Ψ in MRAC (4 vials, separated from 219.850–1, 219.853–5); same locality, beating along trail in primary rainforest, Nov. 5, 2006 (D. De Bakker, J. P. Michiels), 1ɗ1Ψ in MRAC (219.973).
description: Published as part of Huber, Bernhard A., 2007, Two new genera of small, six-eyed pholcid spiders from West Africa, and first record of Spermophorides for mainland Africa (Araneae: Pholcidae), pp. 23-43 in Zootaxa 1635 on pages 26-30, DOI: 10.5281/zenodo.179534