Adult and tritonymph of Scapheremaeus prodigialis sp. n. (Acari: Oribatida: Cymbaeremaeidae) from Vietnam

An adult and a tritonymphal instar of a new arboreal species—Scapheremaeus prodigialis sp. n. (Oribatida, Cymbaeremaeidae)—are described from the Kon Chu Rang Nature Reserve, central Vietnam. The adult is characterized by: costula with long, broad and rounded distally cusp; lamellar seta comparatively long, thickened; interlamellar and exobothridial setae absent; circumdorsal scissure absent; dorsocentral region of notogaster sparsely tuberculate, with two large, weakly developed raised parts and three weakly visible transverse furrows; nine pairs of notogastral setae with c, dm and dp short, weakly swollen distally, la, lm, lp and h1–h3 comparatively long, thickened, weakly dilated in distal half, c and la located close to each other, lm, lp and h1–h3 located in posterolateral position. The tritonymph is characterized by: flattened and comparatively broad body; sparsely plicate gastronotic surface; short, acicular bothridial seta; vestigial bothridium; long, setiform lamellar and interlamellar setae; long, setiform gastronotic setae c3, la, lm, lp, h1–h3 and p1 inserted on large tubercles; and short, acicular gastronotic setae c1, c2, da, dm and dp.