Trichogalumna ohkuboi 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 : 181-182

Trichogalumna ohkuboi Hagino, Bayartogtokh & Shimano, 2017

( Figure 22D, E )

Measurements. Body length: 316–336 μm, width of notogaster 240–256 μm.

Supplementary description. Body colour brown to dark brown. Body surface faintly microtuberculated; pteromorph striated; notogaster and ventral plate with transverse granular bands. Rostrum protruding, slightly nasiform, rounded. Tutorial and lamellar ridges (S and L) distinct, nearly parallel. Rostral and lamellar setae medium long, smooth. Interlamellar seta very short, thin, smooth. Bothridial seta with long, thin stalk and lanceolate head barbed. Dorsosejugal porose areas rounded, located posterolaterad to seta in. Anterior margin of notogaster not developed; dorsophragmatic apophysis (D) medium in size, rounded. Notogastral setae short to medium long, thin, smooth. Porose areas Aa, A 1, A 2 and A 3 nearly circular; A 1 and A 2 closely situated to each other; A 3 situated posterolateral to seta h 1. Lyrifissures ia, im, ih, ip and opisthonotal gland opening (gla) well developed. Morphology of subcapitulum, palp and chelicera typical for genus. Seven pairs of short, thin epimeral setae (1a, 1c, 3a, 3c, 4a, 4b, 4c) observed. Pedotectum II scale-like, subtriangular in ventral view. All ano-genital setae short, thin, smooth; g 1, g 2, and g 3 inserted on anterior margin of genital plate, other setae arranged longitudinally; adanal setae ad 1 and ad 2 inserted posterior to anal plates; ad 3 inserted in paraanal position; lyrifissure iad situated lateral to anal plate. Postanal porose area (Ap) oval, transversely oriented. Legs heterotridactylous, lateral claws serrated dorsally, but median claw smooth. 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. Three males and three 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; 31 females: Sinhwayeoksa-ro, Andeok-myeon, Seogwipo-si, Jeju-do, Korea, soil under Japanese silverberry ( Elaeagnus umbellata ), 1 September, 2022, Coll. Y.S. Bae.

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.