Tapinotorquis yamaskensis, Dupérré, Nadine & Paquin, Pierre, 2007

Dupérré, Nadine & Paquin, Pierre, 2007, Description of five new spiders from Canada (Araneae: Linyphiidae), Zootaxa 1632, pp. 1-20 : 15-17

Tapinotorquis yamaskensis new species

( Figs 38–46 )

Type material. HOLOTYPE: Canada: Québec: Parc National de la Yamaska [45.42°N, 72.39°W] 1ɗ 06.– 13.vi.2006, Berlese extraction, deciduous forest in regeneration, A. Mochon ( AMNH); ALLOTYPE: Parc National de la Yamaska [45.42°N, 72.39°W] 1Ψ 27.vi.–04.vii.2006, pitfall, deciduous forest in regeneration, A. Mochon ( AMNH); PARATYPES: Canada: Québec: Parc National de la Yamaska [45.42°N, 72.39°W] 1Ψ 06.–13.vi.2006, pitfall, deciduous forest in regeneration, A. Mochon ( CPAD).

Material examined. Canada: Québec: Philipsburg [45.04°N, 73.08°W] 1ɗ 27.v.–14.vi.1982, pitfall, edge of deciduous forest, C.D. Dondale & J. Redner ( CNC); Rigaud [45.48°N, 74.30°W] 5Ψ 03.vi.1988, sifting litter, flood plain of river, L. Lesage ( CNC); U.S.A.: Maine: Summerset County, Norridgewock [44.71°N, 69.79°W] 1Ψ 08.x.1986, conifer duff, R.E. Nelson ( CNC); Kennebec County, Rome [44.59°N, 69.87°W] 1Ψ 29.viii.1986, mixed pine & hardwood litter, R.E. Nelson ( CNC).

Diagnosis. See genus diagnosis.

Description. Male (n=2): Total length: 0.98; carapace length: 0.44; carapace width: 0.31; carapace unmodified, smooth, shiny, light yellow with a tinge of orange (1225M), radiating lines and carapace margin suffused with light gray (cool gray 6M), cephalic region ornamented by a light gray marking forming a trident, 5 forward-pointing setae extending from dorsal groove to posterior eye row, the later being the longest. Sternum light yellow with a tinge of orange (1225M), lightly suffused with light gray (cool gray 6M). Chelicerae light yellow with a tinge of orange (1225M), promargin with 5 teeth, retromargin with 4-5 denticles; cheliceral stridulatory organ visible, with ~ 21 striae; associated pick present at base of papal femur. Abdomen uniformly colored, light gray (cool gray 4M to 6M), densely covered with long decumbent setae, book lung cover light yellow (1205M), finely reticulated. Legs light yellow with a tinge of orange (1225M), leg formula 4123; tarsal claws not pectinated; tibia I–III with two dorsal macrosetae, tibia IV with one dorsal macroseta; metatarsus I with dorsal trichobothrium (Tm I 0.31); Tm IV absent. Palpus length: 0.19. Palpal tibia with one retrolateral, one dorsal trichobothria ( Fig. 39 ); palpal tibial apophysis (PTA) consisting of two sharp points ( Fig. 40 ); paracymbium (P), flat, with large apical part, proximal part inconspicuous, bearing 5 or 6 long setae ( Fig. 39 ); sperm duct (SD) making a large coil in the tegulum (T) ( Figs 38, 42 ); tegulum (T) with large coneshaped protegulum (PT), without papillae ( Fig. 38 ); suprategulum (SPT) small, with large median suprategular apophysis (MSA) and membranous distal suprategular apophysis (DSA) ( Fig. 41 ); embolic division simple, consisting of a radix (R), tailpiece (TP) and a short, pointed embolus (E) ( Fig. 41 ).

Female (n=5): Total length: 1.00–1.09; carapace length: 0.43–0.46; carapace width: 0.28–0.31; overall coloration as in male; carapace smooth, shiny, 5 forward-pointing setae extending from dorsal groove to posterior eye row, the later being the longest. Cheliceral promargin with 4 teeth, retromargin with 4–5 denticles, cheliceral stridulatory organ visible, with ~ 20 striae; associated pick present at base of papal femur. Abdomen as in male. Leg formula 4123; tibia I–III with two dorsal macrosetae, tibia IV with one dorsal macroseta; metatarsus I with dorsal trichobothrium (Tm I 0.32–0.33); Tm IV absent. Palpal claw absent. Epigynum width: 0.07–0.09. Epigynal ventral plate (VP), with sinuous, transverse slit ( Fig. 43 ); dorsal plate (DP) an isosceles trapezoid ( Fig. 43 ); copulatory openings (CO) situated on the upright slit of the ventral plate at junction with dorsal plate ( Fig. 44 ); copulatory ducts (CD) large, curving into one loop ( Fig. 44 ); spermathecae (S) large and oval, situated anterior to the epigynal transverse slit ( Figs 43, 45 ); fertilization ducts (FD) large and sinuous ( Fig. 45 ).

Distribution. Only known from a small region in Northeastern North America, east of the Great Lakes in Québec and Maine ( Fig. 46 ).

Habitat. Mainly deciduous forest litter.

Etymology. The epithet yamaskensis refers to the type-locality: Parc National de la Yamaska, where the species was first found by the authors.

Figures

FIGURE 46. Localities of Tapinocyba cameroni new species and Tapinotorquis yamaskensis new species in North America.

FIGURES 38 – 45. Tapinotorquis yamaskensis new species. 38, palpus of male, ventral view, arrow points to the sperm duct position in the distal part of the tegulum; 39, palpus of male, retrolateral view; 40, male palpal tibia, dorsal view; 41, expanded male palpus, schematic illustration; 42 male left palp (to allow comparison with the illustrations of Millidge 1977) retrolateral view, arrow points to the sperm duct position in the distal part of the tegulum; 43, epigynum, ventral view; 44, spermathecae, ventral view; 45, spermathecae, dorsal view. Scale bars = 0.05 mm. Abbreviations used as figures 1 – 9.