Nesiergus insulanus Simon 1903

Guadanucci, José Paulo L. & Gallon, Richard C., 2008, A revision of the spider genera Chaetopelma Ausserer 1871 and Nesiergus Simon 1903 (Araneae, Theraphosidae, Ischnocolinae), Zootaxa 1753, pp. 34-48 : 43-44

Nesiergus insulanus Simon 1903

Figures 26–28

Nesiergus insulanus Simon 1903: 928 (DΨ); Benoit 1978: 412, figs. 3a–e (Ψ); Smith 1990: 134, figs. 878–882 (Ψ).

Material examined. Type material: Holotype Ψ ( MNHN 14090) from the Seychelles (without precise locality); examined.

Diagnosis: Females differ from those of their congeners by the apical segment of the posterior lateral spinnerets being triangular rather than digitiform. Males unknown.

Description: Female (holotype). Total length 27.1. Carapace length 11.0, width 9.2. Eye tubercle length 1.5, width 1.9; anterior row procurved, posterior row recurved, clypeus absent. Labium length 1.4, width 1.9. Sternum length 4.7, width 4.6. Chelicerae with 12 teeth of similar size on promargin. Labium as long as wide, with ca.50 cuspules. Maxillae with ca.70 cuspules. Sternum rounded. Fovea wide, transverse. Palp: femur 5.9/ patella 3.7/ tibia 3.7/ tarsus 3.3/ total 16.6. Legs I: femur 8.3/ patella 5.4/ tibia 6.1/ metatarsus 5.3/ tarsus 2.6/ total 27.7. II: 7.4/ 4.7/ 5.0/ 4.9/ 2.6/ 24.6. III: 6.4/ 3.7/ 3.8/ 5.1/ 2.4/ 21.4. IV: 8.8/ 4.5/ 6.6/ 8.0/ 3.1/ 31.0.

Spines. Palp without spines. Legs: some spiniform thick setae on dorsal surface of all femora. I: metatarsus (v) 0–0–ap 1. II: metatarsus (v) 0–0–p 1. III: patella (p) 1, tibia (v) 0–1–ap2, (p) 0–2–0, (r) 0–1–0, metatarsus (v) 2–2–ap3, (p)0–1–1, (r) 0–1– 1. IV: tibia (v) 0–1–ap3, (r) 1–1–1, metatarsus (v) 1–3–ap3, (p) 0–1–1, (r) 0– 1–1. Spermathecae comprising two receptacula, longer than wide, swollen distally ( Fig. 28 ). Metatarsal scopulae extent (ventral surfaces only): I–II along entire length; III on slightly less than distal half; IV on distal third. Tarsal scopulae (ventral surfaces only): I–II undivided; III–IV divided by longitudinal band of thick setae.

Distribution: Known from an unspecified island in the Seychelles.

Ecology: Unknown.

Figures

FIGURES 26 – 28. Nesiergus insulanus Simon 1903 (holotype female MNHN 14090). 26. Habitus, dorsal view. 27. Prosoma, ventral view. 28. Spermathecae, dorsal view. Scale = 1 mm.