Tapinocyba cameroni, Dupérré, Nadine & Paquin, Pierre, 2007

Dupérré, Nadine & Paquin, Pierre, 2007, Description of five new spiders from Canada (Araneae: Linyphiidae), Zootaxa 1632, pp. 1-20 : 12-14

Tapinocyba cameroni new species

( Figs 30–37 , 46 )

Type material. HOLOTYPE: Canada: Québec: Baie-James (Jamsie), 95 km N of LaSarre [49.61°N, 79.30°W] 1ɗ 06.–15.vi.1997, pitfall, old growth black spruce forest, P. Paquin & N. Dupérré ( AMNH); ALLOTYPE: 1Ψ, same data as holotype ( AMNH); PARATYPES: Canada: Québec: Abitibi-Ouest, Duparquet Lake [48.50°N, 79.22°W] 1Ψ 05.–12.vi.1994, Malaise/flight interception trap (pan), mixed forest, P. Paquin & N. Dupérré ( CPAD); Baie-James (Jamésie), 119 km N of LaSarre [48.50°N, 79.23°W] 2Ψ 06.– 15.vi.1997, Malaise/flight interception trap (pan), mature black spruce forest, P. Paquin & N. Dupérré ( CPAD); Baie-James (Jamésie), 122 km NNE LaSarre [49.82°N, 78.92°W] 1Ψ 06.–15.vi.1997, pitfall, burned black spruce forest, P. Paquin & N. Dupérré ( CPAD); Baie-James (Jamésie), 122 km NNE LaSarre [49.82°N, 78.92°W] 1Ψ 15.–22.vi.1997, flight interception trap, burned black spruce forest, P. Paquin & N. Dupérré ( CPAD); Baie-James (Jamésie), 128 km NNE LaSarre [49.83°N, 78.68°W] 1Ψ 31.viii.–07.ix.1997, pitfall, old growth black spruce forest, P. Paquin & N. Dupérré ( CPAD); Baie-James (Jamésie), 95 km N LaSarre [49.61°N, 79.30°W] 1Ψ 15.vi.1997, 1Ψ 22.–29.vi.1997, 1Ψ 27.vii.–03.viii.1997, 1Ψ 31.viii.–07.ix.1997, pitfall, flight interception trap & soil coring, old growth black spruce forest, P. Paquin & N. Dupérré ( CPAD).

Material examined. Canada: Manitoba: South Indian Lake [56.77°N, 98.92°W] 1Ψ 04.vii.1987, birch litter, C.W. Aitchison ( DBC); South Indian Lake [56.77°N, 98.92°W] 2Ψ 08.vii.1987, aspen litter, C.W. Aitchison ( CNC); Newfoundland: Roddickton [50.85°N, 56.12°W] 1ɗ 2Ψ 10.x.1985, moss, L.H. Hollett ( CNC); Noel Paul’s Brook [48.82°N, 56.30°W] 1Ψ 11.vi.1985, alder litter, L.H. Hollett ( CNC); Millertown, 10 km SE of [48.80°N, 56.53°W] 1Ψ 20.viii.1984, spruce stand, moss, L.H. Hollett ( CNC); Springdale, 20 km S of [49.50°N, 56.05°W] 1ɗ 14.viii.1984, moss, L.H. Hollett ( CNC).

Diagnosis. Tapinocyba cameroni most resembles to Tapinocyba simplex (Emerton 1882) , but is distinguished by the following combination of characters: male embolic division with long tailpiece, pointed basally ( Fig. 30 ); palpal tibial apophysis with two small teeth ventrally ( Fig. 31 ). Females are distinguished by the slightly separated arched slit of the epigynum ( Figs 35, 36 ) and copulatory ducts with two loops ( Fig. 37 ).

Description. Male (n=3): Total length: 1.27–1.40; carapace length: 0.60–0.64; carapace width: 0.46– 0.48; carapace shiny, finely reticulate, hairless except for a row of 4 long, forward-pointing setae extending from dorsal groove to posterior eye row and a few setae in eye area ( Fig. 30 ); light orange-brown (1385M), to dark orange-brown (1525M), suffused with dark gray (404M) along radiating lines and carapace border; cephalic region ornamented by a dark gray marking forming a trident; cephalic pit and sulcus located behind posterior lateral eye ( Fig. 32 ). Sternum light orange-brown (1385M), to dark orange-brown (1525M), lightly suffused with dark gray (404M). Chelicerae light orange-brown (1385M), to dark orange-brown (1525M), promargin with 5 teeth, retromargin with 5 denticles; cheliceral stridulatory organ visible, with ~ 18 striae. Abdomen uniformly colored, light gray (cool gray 7M), to dark gray (cool gray 9M), densely covered with short semi-erect setae; book lung cover whitish with very fine striae. Legs light yellow-orange (143M); claws not pectinated; tibia I–IV with one dorsal macrosetae; metatarsus I with dorsal trichobothrium, Tm I 0.48– 0.50; Tm IV absent. Palpus length: 0.14–0.17. Palpal tibia with two retrolateral trichobothria ( Fig. 31 ), with one large palpal tibial apophysis (PTA) bearing two small teeth ventrally ( Fig. 31 ) curving into a rugose process ( Fig. 33 ); paracymbium C-shaped bearing 5 setae basally ( Fig. 31 ); embolic division simple, embolus (E) short, flat, curving apically ( Figs 30, 34 ); embolic membrane (EM) present ( Fig. 34 ); tailpiece (TP) elongated, projecting basally ( Fig. 34 ); tegulum (T) large, protruding ventrally ( Fig. 30 ); protegulum (PT) large with scale-like protegular papillae ( Figs 30, 34 ); suprategulum (SPT) bearing tooth-like marginal suprategular apophysis (MSA) ( Fig. 34 ).

Female (n=5): Total length: 1.25–1.45; carapace length: 0.62–0.64; carapace width: 0.46–0.48; carapace coloration as in male, shiny, finely reticulate, hairless except for a row of 4 long, forward-pointing setae extending from dorsal groove to posterior eye row and a few setae in eye area. Coloration of sternum and chelicerae as in male, promargin with 5 teeth, retromargin with 5 denticles; cheliceral stridulatory organ visible, with ~ 16 striae. Abdomen as in male. Legs coloration as in male; tibia I–IV with one dorsal macrosetae; metatarsus I with dorsal trichobothrium, Tm I 0.50–0.52; Tm IV absent. Palpal claw absent. Epigynum width: 0.12–0.15. Epigynal ventral plate with large, arched slit where the copulatory openings (CO) are located ( Figs 35, 36 ); copulatory ducts (CD), large, curved and narrowing down into two loops ( Figs 36, 37 ); spermathecae (S) oval ( Figs 35, 37 ); fertilization ducts (FD) long and sinuous ( Fig. 37 ).

Distribution. Canada: Newfoundland to Manitoba ( Fig. 46 ).

Habitat. Mainly coniferous forest litter, apparently a boreal species.

Etymology. This species is named in honor of H.D. Cameron (University of Michigan) for the fascinating contribution he makes to the field of arachnology by providing etymological and linguistic expertise.

Figures

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

FIGURES 30 – 37. Tapinocyba cameroni new species. 30, palpus of male, ventral view; 31, palpus of male, retrolateral view, arrow points to PTA teeth; 32, male cephalothorax, lateral view; 33, male palpal tibia, dorsal view, arrow points to rugose process; 34, cleared male palpus, schematic illustration; 35 epigynum, ventral view; 36, spermathecae, ventral view; 37, spermathecae, dorsal view. Scale bars = 0.05 mm. Abbreviations used as figures 1 – 9.