Pergalumna myrmophila (Berlese, 1914)

Bayartogtokh, Badamdorj & Bae, Yang-Seop, 2024, New findings of poronotic oribatid mites (Acari: Oribatida) from Korea, Zootaxa 5405 (2), pp. 151-184 : 178-180

Pergalumna myrmophila (Berlese, 1914)

( Figures 21 & 23A, B )

Measurements. Body length: 714 μm, width of notogaster 556 μm.

Supplementary description. Body colour dark brown. Body surface microgranulate. Rostrum rounded; lamellar and sublamellar lines thin, parallel, curving backwards. Rostral (63 μm), lamellar (92 μm) and interlamellar (84 μm) setae setiform, thin, smooth. Bothridial seta (151 μm) setiform, finely barbed in distal half. Dorsosejugal porose area oval; dorsophragma irregular in shape. Dorsosejugal suture absent; ten pairs of notogastral setae represented by their alveoli. Three pairs of elongate oval porose areas (Aa, A 1, A 3) more than twice longer than width, A 2 absent. Median pore absent; opisthonotal gland opening and all lyrifissures distinct. Subcapitulum wider than long; subcapitular setae short, setiform, seta h close to anterior edge of mentum. Chelicera and palp typical for family. Epimeral region smooth; epimeral setal formula: 1–0–3–2, epimeral setae smooth. Pedotectum II subtriangular in ventral aspect. Circumpedal carina not reaching pedotectum I. Genital, anal and adanal setae short, setiform, thin, smooth; g 6 and aggenital setae represented by their alveoli. Adanal lyrifissure located close and parallel to anal plate. Adanal setae ad 1 and ad 2 posteriorly, ad 3 laterally to anal aperture. Postanal porose area absent. Legs heterotridactylous, median claw distinctly thicker than lateral claws; setation of legs typical for family; formulas of leg setation and solenidia: I (1–4–3–4–20) II, (1–4–3–4–15); III, (1–2–1–3–15); IV, (1–2–2–3–12), formulas of solenidia I (1–2–2), II (1–1–2), III (1–1–0), IV (0–1–0).

Distribution. Palaearctic and Afrotropical regions.

Material examined. One male: Pachong, Daegu, Gyeongsangbuk-do, under broad-leaved trees, 15 October 2022, Coll. Y.S. Bae.

Remarks. The characters of the present material correspond well with those of the materials studied by Oudemans (1919), Mahunka (1987), and Pérez-Iñigo (1993).

Figures

FIGURE 21. Line drawing images of Pergalumna myrmophila (Berlese, 1914). A—Dorsal view; B—Ventral view of body; C—Lateral view of prodorsum.

FIGURE 23. Compound microscopic images of two species. A—Dorsal view, B—Ventral view of Pergalumna myrmophila (Berlese, 1914); C—Dorsal view, D—Ventral view of Trichogalumna boninensis Hagino, Bayartogtokh & Shimano, 2017.