Trichogalumna boninensis Hagino, Bayartogtokh & Shimano, 2017

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

Trichogalumna boninensis Hagino, Bayartogtokh & Shimano, 2017

( Figures 22A–C & 23 C, D )

Measurements. Body length: 280–288 μm, width of notogaster 202–208 μm.

Supplementary description. Body colour deep reddish brown. Body surface microgranulate; pteromorph covered with dense granules; notogaster and ventral plate with transverse granular bands. Rostrum protruding, slightly nasiform, rounded. Tutorial and lamellar ridges (S and L) distinct, curving backwards. Rostral (ro) and lamellar (le) setae setiform, smooth. Interlamellar seta (in) short, thin, smooth. Bothridial seta (bs) having thin stalk and lanceolate head. Dorsosejugal porose area (Ad) rounded, located posterolaterad to seta in. Anterior margin of notogaster not developed. Dorsophragmatic apophysis (D) rounded, medium in size. Notogastral setae, thin, smooth. Four pairs of porose areas, Aa, A 1, A 2 and A 3 nearly circular in shape; A 1 and A 2 closely situated to each other; A 3 situated posterior to seta h 1. Lyrifissures ia, im, ih, ip and opisthonotal gland opening (gla) well developed. Subcapitulum, palp and chelicera typical for genus, subcapitular setae thin, smooth. Only four pairs of short epimeral setae (1a, 3a, 3b, 4c) observed, other setae not evident. Pedotectum II scale-like, subtriangular in ventral view; circumpedal carina well developed. Genital setae short, thin, smooth; g 1 – g 3 inserted on anterior margin of genital plate, other setae arranged longitudinally. Aggenital, anal and adanal setae represented by their alveoli, ad 1 and ad 2 inserted posterior to anal plates; ad 3 inserted in paraanal position; lyrifissure iad situated anteromediad to ad 3. Postanal porose area (Ap) rounded. Legs heterodactylous, formulas of leg setae: 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 (1–2–2), III (1–1–0), IV (0–1–0).

Distribution. Japan and Korea.

Material examined. Two females: San171, Taeha-ri, Seo-myeon, Ulleung-gun, North Gyeongsang Province, Korea, 37°29’35.13”N, 130°49’40.71”E, soil and litter of mixed forest composed by Siebold humlock ( Tsuga sieboldii Carrière ), Japanese white pine ( Pinus parviflora Siebold & Zuccarini ) and Engler’s beech ( Fagus engleriana Seemen ex Diels ), 26 May 2022, Coll. T.G. Lee; one female: Pyeongchan, Jinbu, Gangweong-do, 920 m a.s.l., 17.IX.2022, Coll. Y.S. Bae, Korea.

Remarks. The characters of the present material correspond well with those of the type specimens studied by Hagino et al. (2017).

Figures

FIGURE 22. Line drawing images of two species of Galumnidae. A—Dorsal view, B—Ventral view ofbody,C—Rostrum (dorso-frontal view)of Trichogalumna boninensis Hagino,Bayartogtokh & Shimano, 2017; D—Dorsal view, E—Rostrum (dorso-frontal view) of Trichogalumna ohkuboi Hagino, Bayartogtokh & Shimano, 2017.

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.