Emblyna chitina ( Chamberlin & Gertsch 1958 )

Paquin, Pierre & Dupérré, Nadine, 2006, The spiders of Québec: update, additions and corrections, Zootaxa 1133, pp. 1-37 : 8-10

Emblyna chitina ( Chamberlin & Gertsch 1958)

( Figs 9–13 )

Material examined.— Canada: Québec: Baie­James (Jamésie): Villebois [49°01’N, 79°08’W] 15.–22.vi.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): Villebois [49°01’N, 79°08’W] 22.– 29.vi.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): Villebois [49°01’N, 79°08’W] 06.–13.vii.1997, flight interception trap in mature Black spruce forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): Villebois [49°01’N, 79°08’W] 13.–20.vii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): Villebois [49°01’N, 79°08’W] 03.–10.viii.1997, flight interception trap in mature Black spruce forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 86 km N LaSarre [49°29’N, 79°17’W] 20.–27.vii.1997, flight interception trap in old growth Black spruce forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 87 km N LaSarre [49°32’N, 79°20’W] 15.–22.vi.1997, Malaise/flight interception trap (pan) in old growth Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 87 km N LaSarre [49°32’N, 79°19’W] 06.–15.vi.1997, flight interception trap in old growth Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 87 km N LaSarre [49°32’N, 79°19’W] 15.–22.vi.1997, flight interception trap in old growth Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 87 km N LaSarre [49°32’N, 79°19’W] 22.–29.vi.1997, flight interception trap in old growth Black spruce forest, 2ɗ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 87 km N LaSarre [49°32’N, 79°19’W] 13.–20.vii.1997, flight interception trap in old growth Black spruce forest, 1Ψ, 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, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 88 km N LaSarre [49°33’N, 79°18’W] 22.–29.vi.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 88 km N LaSarre [49°33’N, 79°18’W] 20.–27.vii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 88 km N LaSarre [49°33’N, 79°18’W] 27.vii.–03.viii.1997, flight interception trap in mature Black spruce forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 89 km N LaSarre [49°33’N, 78°59’W] 06.–15.vi.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 89 km N LaSarre [49°33’N, 78°59’W] 29.vi.–06.vii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 91 km N LaSarre [49°35’N, 79°17’W] 13.–20.vii.1997, flight interception trap in old growth Black spruce forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 95 km N LaSarre [49°36’N, 79°18’W] 13.–20.vii.1997, flight interception trap in old growth Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 98 km N LaSarre [49°37’N, 79°17’W] 06.–15.vi.1997, flight interception trap in mature Black spruce forest, 2ɗ, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 98 km N LaSarre [49°37’N, 79°17’W] 15.–22.vi.1997, flight interception trap in mature Black spruce forest, 1ɗ 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 98 km N LaSarre [49°37’N, 79°17’W] 22.–29.vi.1997, flight interception trap in mature Black spruce forest, 1ɗ 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 15.–22.vi.1997, flight interception trap in mature Black spruce forest, 2ɗ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 22.–29.vi.1997, flight interception trap in mature Black spruce forest, 1ɗ 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 29.vi.–06.vii.1997, flight interception trap in mature Black spruce forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 13.–20.vii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 20.–27.vii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 27.vii.–03.viii.1997, flight interception trap in mature Black spruce forest, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°54’W] 24.–31.viii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°51’W] 06.–15.vi.1997, flight interception trap in old growth Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°51’W] 15.–22.vi.1997, flight interception trap in old growth Black spruce forest, 1ɗ, 2Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°51’W] 22.–29.vi.1997, flight interception trap in old growth Black spruce forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°51’W] 27.vii.–03.viii.1997, flight interception trap in old growth Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°51’W] 20.–27.vii.1997, flight interception trap in old growth Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 122 km NNE LaSarre [49°48’N, 78°52’W] 13.–20.vii.1997, flight interception trap in regenerating Black spruce forest, 4Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°01’W] 06.–15.vi.1997, Malaise/ flight interception trap (pan) in mature Black spruce forest, 2ɗ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°01’W] 15.–22.vi.1997, Malaise/flight interception trap (pan) in mature Black spruce forest, 1ɗ 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°01’W] 22.– 29.vi.1997, Malaise/flight interception trap (pan) in mature Black spruce forest, 1ɗ, P.

Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°01’W] 29.vi.–06.vii.1997, Malaise/flight interception trap (pan) in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°01’W] 10.–17.viii.1997, Emergence cage (head) in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°00’W] 06.–15.vi.1997, flight interception trap in mature Black spruce forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°00’W] 15.–22.vi.1997, flight interception trap in mature Black spruce forest, 1ɗ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°00’W] 22.–29.vi.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°00’W] 29.vi.–06.vii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°00’W] 27.vii.–03.viii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°00’W] 06.–13.vii.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 119 km N LaSarre [49°49’N, 79°00’W] 06.–15.vi.1997, flight interception trap in mature Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 128 km NNE LaSarre [49°50’N, 78°41’W] 06.–15.vi.1997, flight interception trap in old growth Black spruce forest, 3ɗ, P. Paquin & N. Dupérré ( CPAD); Baie­James (Jamésie): 128 km NNE LaSarre [49°50’N, 78°41’W] 20.–27.vii.1997, flight interception trap in old growth Black spruce forest, 1Ψ, P. Paquin & N. Dupérré ( CPAD).

Diagnosis.— Males of E. chitina are characterised by the embolic loop enlarging ectally ( Fig. 9 ), the tip of embolus (E) coming out of the tegular apophysis (TEGA sensu Bennett 2005) at a right angle ( Figs 9–10 ), a palpal tibia rather long and thin ( Fig. 9 ), a non­RTA palpal tibial apophysis (sensu Bennett 2005) with two small and elongate ctenidia (CT) ( Fig. 11 ). Females are characterised by the carinate lateral fovea forming a broad median septum (MS) slightly narrowing anteriorly ( Fig. 12 ), a shallow and inconspicuous atrium (AT) with two small rounded spermathecae (S) touching medially, not always visible through the cuticle ( Fig. 12 ), and fertilisation ducts (FD) originating apically from the spermathecae (S) ( Fig. 13 ).

Distribution.— Transcontinental boreal species.

Remark.— Emblyna chitina is morphologically similar to Emblyna peragrata and the two species have been confused in the past. Recent examination of representatives of both species by D.J. Buckle (pers. comm.) shed light on the problem. We have studied the specimens curated at the CNC and our own records (given above) and confirm his findings. This allows us to clarify the distribution of the two species. Emblyna chitina is a widespread boreal species, found from Alaska, British Columbia to Québec, while E. peragrata is restricted to the West Coast of British Columbia. Chamberlin & Gertsch (1958) list "one female, probably this species" from Rousseau Bay, Tchapahipane Is., Québec in the list of localities given for E. peragrata . Fortunately, this record was overlooked by all authors who treated the spiders of Québec as it now appears erroneous. Females, as all female of the Emblyna / Dictyna complex, are especially difficult to distinguish and it is best to consider the record of E. peragrata from Québec by Chamberlin & Gertsch (1958) as a mis­identification of E. chitina . Renault (1968) recorded and illustrated a species from New Brunswick under the name Dictyna near peragrata . Most likely, he was also referring to E. chitina .

Figures

FIGURES 1 – 13. 1 – 4. Araneus thaddeus. 1, abdomen of male, dorsal view; 2, abdomen of female, dorsal view; 3, palpus of male, prolateral view; 4, epigynum, ventral view. 5 – 8. Araneus washingtoni. 5, abdomen of male, dorsal view; 6, abdomen of female, dorsal view; 7, palpus of male, prolateral view; 8, epigynum, ventral view. 9 – 13. Dictyna chitina. 9, palpus of male, ventral view; 10, palpus of male, tip of embolus, ventral view; 11, palpal tibia of male, retrolateral view; 12, epigynum, ventral view; 13, spermathecae, dorsal view.