Desoria pilifrons Fjellberg, 2010, sp. n.

• Main Author: Fjellberg, Arne
• Format: Other/Unknown Material
• Language: unknown
• Published: 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Entognatha; Collembola; Isotomidae; Desoria; Desoria pilifrons; Canada; Seta; glacier*
• Online Access: https://zenodo.org/record/3509393; https://doi.org/10.5281/zenodo.3509393

Desoria pilifrons sp. n. (Figs. 50–56) Type material. Holotype: One specimen (slide, not sexed) labelled " Canada, B.C. Vancouver Island, Comox Glacier, 49 o 33 'N, 125 o 21 'W, 26.VIII. 1983. Wet moss in melt water, 1.850 m. A. Fjellberg 375 / 83 ". Paratypes: Four specimens in two slides, same data as holotype (INHS). Description. Body size up to 1.6 mm. Body shape slender, with pear-shaped abdomen. Abd. 5–6 fused, but with a gap in setal cover. Head distinctly prognathous (Fig. 50). Colour pale bluish grey, darkest in anterior part of the body. Ocelli 8 + 8, G & H smaller. PAO oval, about 1.3 times as long as diameter of nearest ocellus. Three setae associated with PAO (Fig. 51). Ant. 1 with 4–5 short ventroapical sensilla and a few curved setaceous sensilla. Ant. 2 with two small setaceous sensilla in lateral position near apex. Ant. 3 organ normal, with several additional small setaceous sensilla (Fig. 54). One or two erect setaceous sensilla ventrally on ant. 2–3 in some individuals. Ant. 4 apically with two blunt lobes and a bifurcate pine seta; subapical organ with a globular organite (Fig. 52). Labrum with 4 / 554 strong curved setae. Apical edge with 4 sharp lobes and a composite ventral ciliation. Frontoclypeal area with more than 30 setae in adults (Fig. 53). Maxillary palp bifurcate, 4 sublobal setae. Labial palps complete, guard e 7 present, 4 proximal setae. Terminal sensilla on labial papillae longer than guards. Basal fields of labium with 5 median and 5 lateral setae. Hypostomal papilla with H longer than h 1 /h 2. Head with 5–7 postlabial setae on each side of ventral line. Mandibles normal, strong. Maxillae unmodified, with 3 -toothed capitulum and 6 short lamellae covered with fine denticles. Body integument smooth. Ground cover of setae dense, markedly "double" all over the body with short microchaetae and dagger-like mesochaetae (as Fig. 30). Macrochaetae strong, those on abd. 5–6 finely serrated in apical half. Median macrochaeta on abd. 5 2.5 –3.0 times as long as inner edge of last ...