Ceratinopsis nigripalpis Emerton 1882

Paquin, Pierre & Dupérré, Nadine, 2006, The spiders of Québec: update, additions and corrections, Zootaxa 1133, pp. 1-37 : 12

Ceratinopsis nigripalpis Emerton 1882

( Figs 21–24 )

Material examined.— Canada: Québec: Kazabazua, La Vallée­de­la­Gatineau, Lac Danford [45°57’N, 76°08’W] 22.ix.2004, beating vegetation along a trail to a fen, 2ɗ 5Ψ, P. Paquin & N. Dupérré ( CPAD).

Diagnosis.— This species is very similar to C. nigriceps (see Paquin & Dupérré 2003, figs 879–882) but males differ from the latter by the longer embolus (E) ( Fig. 21 ) and the shape of the palpal tibia ( Fig. 23 ). Females differ by the median region of the epigynal plate shaped like an inverted­T (arrow) and by the oval spermathecae (S) oriented obliquely ( Fig. 24 ).

Distribution.— Widespread on the eastern side of the continent, north from New Brunswick, Nova Scotia and Minnesota, south to Louisiana and Georgia.

Remark.— Kaston (1948) and Hutchinson & Bélanger (1994) report that C. nigripalpis has been collected mainly from vegetation, which is supported by our collections. This is unusual for an erigonine Linyphiidae as most species are ground dwellers.

Figures

FIGURES 14 – 24. 14 – 16. Zelotes exiguoides. 14, palpus of male, ventral view; 15, palpal tibia of male, retrolateral view; 16 epigynum, ventral view. 17 – 20. Centromerus cornupalpis. 17, palpus of male, retrolateral view; 18, palpus of male, prolateral view; 19, epigynum, ventral view; 20, epigynum, lateral view. 21 – 24. Ceratinopsis nigripalpis. 21, palpus of male, ventral view; 22, cephalothorax of male, lateral view; 23, palpal tibia of male, dorsal view; 24, epigynum, ventral view.