Unionicola Haldeman 1842

• Main Author: Tuzovskij, Petr V.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Trombidiformes; Unionicolidae; Unionicola; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.6166622; http://treatment.plazi.org/id/03C82744C412FFC5FF64FE9FD8A19301

Genus Unionicola Haldeman, 1842 Unionicola ( Pentatax ) figuralis (Koch, 1836) (Figs 1–11) Material examined. Larvae (n = 8) were reared from single female collected in D’yakonovskoe Lake, Ust’- Kamchatsky District, Kamchatka Province, 8 August 1983. The duration of the embryonic period was 14 days at room temperature. Diagnosis. Dorsal plate elongated (L/W ratio 1.65–1.75), setae Oe shorter than Hi, He, Sci and Sce excretory pore plate much longer than wide; setae Ai relatively long and reaching posterior margin of excretory pore plate; basal segments of chelicerae nearly as long as wide; P-5 with two very long setae; II—Leg-4 with a single greatly thickened seta. Description. Idiosoma flat, dorsal plate in unengorged larvae covering almost the whole dorsum (Fig. 1), with slightly convex lateral margins, its anterior margin straight or slightly convex, posterior margin rounded, with short and punctuate scale-like patterns. All four pairs of setae on the dorsal plate thin and approximately equal in length. Setae Oe, Hi, He, Sci, Sce, Li and Le situated in soft integument: Oe, Li and Le subequal, shorter than other setae situated in the integument. Coxal plates moderately large and elongate, plate II–III with a posteromedial muscle attachment scar on each side (Fig. 2). Setae C1 relatively short and extending beyond bases of C4; the latter setae longest among the coxal setae and extending to posterior margin of the coxal plates II–III. Setae C2 and C3 subequal, longer than C1 but shorter than C4. Well developed tmas situated in posteromedial corner of coxa III on each side. Setae Ci very long, well thickened, located on small tubercles; Si very short; Pi longer than Pe and Se . Excretory pore plate oval (Fig. 3), much longer than wide (L/W ratio 1.4–1.5), rounded posteriorly, narrow anteriorly; setae Ai relatively short, thin located anteriorly close to each other, and reaching or slightly extending to posterior margin of excretory pore plate; setae Ae longer and thicker than Ai , located laterally nearly in ...