Unionicola gracilipalpis Viets 1908

• Main Authors: Tuzovskij, Petr V., Semenchenko, Ksenia A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Trombidiformes; Unionicolidae; Unionicola; Unionicola gracilipalpis; Seta; Anadyr; Anadyr’; Magadan; Sickle; Anadyr'
• Online Access: https://zenodo.org/record/6092191; https://doi.org/10.5281/zenodo.6092191

Unionicola gracilipalpis (Viets, 1908) (Figs 10 A–D, 11 A–D) Material examined. 1 male, 2 females: Russia, Yaroslavl Province, Nekouz District, small lake near village Pogorelka, July 1975; 2 males, 1 female, Magadan Province, Tenkinsky District, small lakes near village Agrobasa, July 1979; 4 males, 4 females: Magadan Province, Anadyr District, small lakes near settlement Markovo, July–September 1981; 3 females: Samara Province, Stavropol District, National natural Park “Samarskaya Luka”, small lake near village Koltsovo, September 1992, leg. P.V. Tuzovskij. All males and females are collected freeswimming. Diagnosis. Adults. Dorsum with two pairs of small unequal platelets; coxal plates III+IV elongated with straight medial margin; pedipalp slender, P- 3 with relatively short setae (not longer than segment), base of lateral seta located proximally to middle of segment, P- 4 with long lateral tubercle, both ventral tubercles small, P- 5 long with slightly concave ventral margin; medial setae on all genital plates in female long and nearly subequal; genital plates of male relatively narrow, fused to each other by posterior ends only; swimming setae on IV-Leg- 5 shorter than IV-Leg- 6; claws of legs I thick, hook-like, claws of legs II–IV thin, sickle-shaped. Description. Both sexes. Dorsum with two pairs of small unequal platelets (Fig. 10 A), anterior platelets relatively large, elongate; posterior platelets very small or not developed. Anterior and posterior coxal groups (Fig. 10 B) divided by narrow interspace, sclerites, bearing setae and glandularia Le, much larger than sclerites bearing other idiosomal setae. Apodemes of first coxal group reaching or slightly extending beyond to anterior margin of third coxae. Coxal plates III+IV elongated (L/W ratio 1.3–1.4) with straight medial margin. Surface of all coxal plates with reticulations. Pedipalps (Fig. 11 A) very slender: P- 2 with straight or slightly concave ventral margin and three to four proximal setae and single dorsodistal seta; P- 3 with relatively ...