Desoria ater 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 ater; Montana Creek; Seta; glacier; Alaska
• Online Access: https://zenodo.org/record/3502711; https://doi.org/10.5281/zenodo.3502711

Desoria ater sp. n. (Figs. 35–43, 113, 115D) Type material (in alcohol, sex not checked). Holotype and 11 paratypes from "Alaska Mountains,. between Mendenhall Glacier and Montana Creek Trail, 58 o 29 'N, 134 o 40 'W, on goat dung in snowfields, 1,000 m alt., 14.VII. 1980, A. Fjellberg leg." (INHS). Description. Body size up to 1.7 mm. Body shape slender, typical Desoria with abdomen slightly pearshaped (Fig. 115 D). Head shape normal, not prognathous/hypognathous. Abd. 5–6 completely fused, without a gap in setal cover. Colour uniformly dark greyish black. Antennae, legs (beyond coxae) and furca paler, greyish green; antennal segments all of same colour. Head with two small white spots between the eye-fields (Fig. 113). Ocelli 8 + 8, G & H slightly smaller, arrangement characteristic, with ocelli ABCDE forming a triangle. PAO oval, as long as diameter of nearest ocellus. Two setae near ventral edge of PAO (Fig. 41). Ant. 1 with a group of 5–6 short ventroapical sensilla and more than 10 setaceous sensilla (Fig. 36). Ant. 2 and 3 with several lateral and ventrolateral setaceous sensilla (Figs. 37–38). Ant. 4 with bifurcate subapical pin seta, subapical organite small, globular. Labrum with 4 / 554 slender normal setae, apical edge with 4 sharp folds and a composite ventral ciliation. Frontoclypeal field with more than 10 setae (Fig. 40), two setae present between antennal base and upper corner of labrum. Maxillary palp bifurcate, four sublobal setae. Labial palps complete, guard e 7 present, four proximal setae; terminal setae of the papillae as long as guards. Hypostomal papilla with subequal H and h 1 /h 2. Basal fields of labium with 5 medial and 5 lateral setae. Ventral side of head with 4–8 postlabial setae on each side. Mandibles normal, strong. Maxillae unmodified, with 3 -toothed capitulum and short lamellae covered with fine denticles. Body integument smooth, macrochaetae very long with fine ciliation, mostly on anterior side (Figs. 35, 39). Median macrochaetae on abd. 5 are 3.5 –4.0 as long as ...