Sejus americanus Banks 1902

• Main Author: Walter, David Evans
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Mesostigmata; Sejidae; Sejus; Sejus americanus; Peace River
• Online Access: https://doi.org/10.5281/zenodo.6159960; http://treatment.plazi.org/id/094E480B5C20FFCBFF3E49786A53D09B

Sejus americanus (Banks, 1902) Figures 36–47 Specimens examined . Canada , Alberta : One female, ex meadow soil and litter in aspen parkland (53°39' 27”N, 112°46' 01”W), 11 km S Lamont, Lamont Co., Alberta Canada, 27 May 2007; 2 males same data but litter under shrubs, 13.v.2007; 3 females ex polypore sporocarps on aspen logs (53°39' 24”N, 112°45' 34”W), 16 July 2011; 1 female, 2 male, 1 deutonymph ex litter, moss, rotten wood under brush pile (53°39' 24”N, 112°45' 34”W), 15 June 2012, D.E. Walter & H.C. Proctor; 2 females, 1 male Ecosystem Management Emulating Natural Disturbance Project (EMEND), NW Peace River (56° 46' 13'' N,– 118° 22' 28'' W), 25–940, 83–892, 63–889, I. Diaz. Quebec: 2 females, 1 male ex white spruce, Harrington, C.I.P. Tree Farm, 9 June 1965, R.M. Emberson. New Brunswick : 1 female, 1 male ex deciduous litter in depression, Kouchibouguac National Park, Kent Co., 27–29 September 1977, I.M. Smith; one female same data except beneath bark of fallen beech branch, 26 July 1978. USA: Minnesota: 2 females, in rotten wood, Anaka Co., 19 April 1941, G. Kretzschmer. All in the Canadian National Collection. Diagnosis . Adults large (adult idiosoma 900–1100 long along midline). Cuticle sticky, with adherent soil particles; soft cuticle plicate and with numerous small (5–6) denticles ventrally, laterally; dorsal shields ornamented with large, rounded tubercles (Figs 36, 44); peritrematal shield broad, joined to podonotal shield anteriorly; peritreme on ventral margin of shield extending from between coxae III–IV to near juncture podonotal shield. Posterior horn-complexes each formed of inner and outer horns with distal seta and separated from other shields by soft cuticle; outer horn conical with long (~100) stalk bearing stout (125 long), densely barbed seta with spatulate, membranous tip (flame seta); ~4 small (20–25) subdistal (midpoint to near base of flame seta) barbed setae; 4 longer (38–56) densely barbed setae on outer margin, dorsal and ventral poroid; inner projection short (~35) with ...