Bioacoustics of Scyletria inflata

Description. Male : Male from Cape Breton Highlands National Park, Nova Scotia , Canada : total length 1.91 mm ; carapace 0.91 mm long, 0.62 mm wide. Carapace dark orange, evenly convex at sides, steeply ascending from posterior margin to dorsal groove, then convex to posterior eye row, lacking lobes and pits; clypeus somewhat protruding. Posterior eye row procurved; anterior eye row recurved; eyes subequal in diameter; anterior lateral eyes and posterior lateral eyes touching. Chelicerae yellow, with about 18 stridulatory ridges; promargin with 5 small teeth, and retromargin with 3 denticles. Sternum mid-brown, shiny. Abdomen dark grey. Legs yellowish; tibial dorsal macrosetae 2221; TmI circa 0.40; TmIV absent; coxa IV with stridulatory pick. Palpal tibia black, with 2 dorsal apophyses of about equal length ( Fig. 4 ); mesal of these apophyses bifid at tip; apophyses separated by deep fissure ( Fig. 4 ). Paracymbium broad, flat, with distal hook, proximal end bearing two setae ( Fig. 2 ); embolic division with radix and tailpiece without break ( Fig. 3 ); radix long and folded, with large outgrowth (R out) with fringed edges ( Fig. 3 ); tailpiece long, sac-shaped, with shallow excavation on mesal margin, bearing a long, sharp, transparent spine basally ( Fig. 3 ); embolus short and flat; anterior radical process and embolic membrane present ( Figs. 1, 2 ). Female: Female from Ste. Méthode, Québec, Canada : total length 1.83 mm ; carapace 0.87 mm long, 0.46 mm wide. Carapace, sternum, abdomen and legs essentially as in male. Cheliceral retromargin with 10 minute denticles. A full description with illustrations of the female is given in Dupéré [ sic ] et al . (2006: Figs. 20–21). Variation. Males: Six males gave the following (mean ± 1 SD): total length 1.64 ± 0.16 mm ; carapace 0.81 ± 0.06 mm long, 0.60 ± 0.03 mm wide. Carapace dull yellow to dark yellow, dull reddish in some specimens. Sternum often suffused with dark grey. Abdomen usually dark. Legs yellow to pale orange. Females: Five females gave the following (mean ± 1 SD): total length 1.65 ± 0.16 mm ; carapace 0.68 ± 0.05 mm long, 0.48 ± 0.05 mm wide (from Dupéré [ sic ] et al. 2006). See Dupéré [ sic ] et al. 2006 for additional details. Natural history. Captured in a variety of habitats (summarized in Dupéré [ sic ] et al . 2006), the species is an epigeal spider from the boreal region of North America with extension southward in the Appalachian Mountains. Little else is known of its natural history.