Thyreosthenius parasiticus Westring 1851
Thyreosthenius parasiticus (Westring 1851) (Figs 37–40) Material examined.— Canada: Québec: BromeMissisquoi, SaintArmand [45 °02’N, 73 °03’W] 04.ix. 2000, hand collecting under bark of dead tree, 1 Ψ, N. Dupérré & P. Paquin (CPAD); Longueuil, Boucherville [45 ° 36 ’N, 73 ° 27 ’W] 01.x. 2000, h...
Main Authors: | , |
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Format: | Other/Unknown Material |
Language: | unknown |
Published: |
2006
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Online Access: | https://zenodo.org/record/6255547 https://doi.org/10.5281/zenodo.6255547 |
Summary: | Thyreosthenius parasiticus (Westring 1851) (Figs 37–40) Material examined.— Canada: Québec: BromeMissisquoi, SaintArmand [45 °02’N, 73 °03’W] 04.ix. 2000, hand collecting under bark of dead tree, 1 Ψ, N. Dupérré & P. Paquin (CPAD); Longueuil, Boucherville [45 ° 36 ’N, 73 ° 27 ’W] 01.x. 2000, hand collecting under bark, 1 Ψ, C. Chantal (CPAD); BromeMissisquoi, SaintArmand [45 °02’N, 73 °03’W] 19.ix. 2004, hand collecting under wood beams, 1 ɗ 2 Ψ, P. Paquin & N. Dupérré (CPAD); Gatineau, Aylmer [45 ° 23 ’N, 75 ° 49 ’W] 20.x. 1989, hand collecting in wood chips, 2 Ψ, L. LeSage (CPAD); Parc de la Gatineau, Lac Brown [45 ° 36 ’N, 75 ° 55 ’W] 21.xi. 1991, leaf litter on margin of the lake, 1 ɗ 1 Ψ, R. Hutchinson & L. LeSage (CNC). Diagnosis.— The males are recognised by the long curved embolus (E) (Fig. 37), the pointed anterior radical process (ARP) (Fig. 37), and the shape of the palpal tibia (Fig. 39). Females are recognised by the presence of a cuspshaped knob (arrow) on the anterior portion of the epigynal plate (Fig. 40), and the oblique slitlike copulatory openings (CO) (Fig. 40). Distribution.— Palearctic. In North America, the species is found on the eastern side of the continent from Newfoundland to Wisconsin, south to Ohio. An isolated record is known from Washington (Crawford 1988). Remark.— The occurrence of the species in Québec was suspected by Hutchinson & Bélanger (1994) who reported its occurrence from habitats related to forest and decaying wood, which is supported by the records given here. Interestingly, all the above specimens were collected in late summer–early fall. Published as part of Paquin, Pierre & Dupérré, Nadine, 2006, The spiders of Québec: update, additions and corrections, pp. 1-37 in Zootaxa 1133 on pages 18-19, DOI:10.5281/zenodo.273386 |
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