Eridantes utibilis Crosby & Bishop 1933

Paquin, Pierre & Dupérré, Nadine, 2006, The spiders of Québec: update, additions and corrections, Zootaxa 1133, pp. 1-37 : 14-15

Eridantes utibilis Crosby & Bishop 1933

( Figs 25–28 )

Material examined.— Canada: Québec: Rouyn­Noranda: Labyrinthe Lake [48°14’N, 79°29’W] 07.–14.vii.1996, Malaise/flight interception trap (pan) in White cedar/Balsam fir forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Rouyn­Noranda: Labyrinthe Lake [48°14’N, 79°29’W] 12.vi.1996, Berlese extraction from White cedar/Balsam fir forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Rouyn­Noranda: Labyrinthe Lake [48°14’N, 79°29’W] 12.vi.1996, Berlese extraction from White cedar/Balsam fir forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Rouyn­Noranda: Labyrinthe Lake [48°14’N, 79°29’W] 24.vii.1996, Berlese extraction from White cedar/Balsam fir forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Rouyn­Noranda: Labyrinthe Lake [48°14’N, 79°29’W] 18.viii.1996, Berlese extraction from White cedar/Balsam fir forest, 1ɗ 2Ψ, P. Paquin & N. Dupérré ( CPAD); Rouyn­Noranda: Labyrinthe Lake [48°14’N, 79°29’W] 18.ix.1996, Berlese extraction from White cedar/Balsam fir forest, 1ɗ 2Ψ, P. Paquin & N. Dupérré ( CPAD); Rouyn­Noranda: Labyrinthe Lake [48°14’N, 79°29’W] 13.ix.1996, Berlese extraction from White cedar/Balsam fir forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 29.v.–05.vi.1994, Malaise/flight interception trap (pan) in mixed forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 12.–19.vi.1994, Malaise/flight interception trap (pan) in mixed forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 02.–09.ix.1994, Malaise/flight interception trap (pan) in mixed forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 23.v.– 02.vi.1996, pitfall in White cedar/Balsam fir forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 22.vii.1997, Berlese extraction from White cedar/Balsam fir forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 22.viii.1997, Berlese extraction poplar forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 22.viii.1997, Berlese extraction from White cedar/Balsam fir forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 22.viii.1997, Berlese extraction from poplar forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 22.ix.1997, Berlese extraction from mixed forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 24.vii.1996, Berlese extraction from White cedar/Balsam fir forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 18.viii.1996, Berlese extraction from White cedar/Balsam fir forest, 1ɗ 1Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 18.ix.1996, Berlese extraction from White cedar/Balsam fir forest, 2ɗ 2Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 13.ix.1996, Berlese extraction from White cedar/Balsam fir forest, 1ɗ 4Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 31.vii.–07.viii.1994, Malaise/flight interception trap (pan) in mixed forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Abitibi­Ouest: Duparquet Lake [48°30’N, 79°13’W] 25.xii–08.i.1995, Winter pitfall in mixed forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 87 km N LaSarre [49°32’N, 79°20’W] 04.viii.1997, Berlese extraction from old growth Black spruce forest, 3ɗ 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 06.–15.vi.1997, Malaise/flight interception trap (pan) in regenerating Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 09.ix.2002, Berlese extraction from regenerating Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°01’W] 04.vii.1997, Berlese extraction from mature Black spruce forest, 5Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°01’W] 09.ix.1997, Berlese extraction from mature Black spruce forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD).

Diagnosis.— Males of Eridantes utibilis are characterised by a large, curved embolus (E) with a bent tip ( Fig. 25 ), the shape of the embolic division (arrow, Fig. 25 ) and the finger­like palpal tibial apophysis (PTA) ( Fig. 27 ). Females are recognised by the presence of a pale median triangular region (arrow) and the rounded spermathecae (S) flanked on each side ( Fig. 28 ).

Distribution.— Known from Québec (present records) and Nova Scotia to Wisconsin and New York (see Buckle et al. 2001).

Remark.— The numerous records from the boreal forest of Québec suggest that it may be locally common in conifer forests, especially among mosses and litter. Interestingly, most collections were done with Berlese extraction of litter. Other trapping methods in the same location were not as productive.

Figures

FIGURES 25 – 32. 25 – 28. Eridantes utibilis. 25, palpus of male, ventral view; 26, cephalothorax of male, lateral view; 27, palpal tibia of male, dorsal view; 28, epigynum, ventral view. 29 – 30. Pocadicnemis spp. 29, Pocadicnemis pumila, palpus of male, median apophysis, apical view; 30, Pocadicnemis americana, palpus of male, median apophysis, apical view. 31 – 32. Sciastes extremus. 31, palpus of male, ventral view; 32, palpal tibia of male, dorsal view.