Key to the world species of Holoparasitus Oudemans, 1936 (Acari: Parasitiformes: Parasitidae) Author Witaliński, Wojciech text Zootaxa 2017 4277 3 301 351 journal article 32824 10.11646/zootaxa.4277.3.1 426319f0-f361-4222-bf48-b093743b0b96 1175-5326 810605 70C1663B-F33F-42C1-99C9-FC3A0A4110DA Holoparasitus hemisphaericus species-group (Witaliński, 2006) Diagnosis. Both sexes. Gnathotectum trispinate; the gv1 pores present, gland pores gv 2 in unmodified cuticle. Female. Presternal plate wide, narrowed medially, its anterior margin smooth, lateral platelets free and narrow; posterior paragynial lobes distant; metagynial sclerites semicircular; posterolateral protrusions locking the epigynial plate minute or absent; the thickening of the anterior paragynial edge facing coxa III absent; central apex of the epigynial shield less pigmented and right-angled, lateral prongs large and acute; the epigynial subapical structure broad and barrel-shaped in the outline; lateral protrusions bipartite, comprised of small, semicircular and well sclerotised posterior structures passing anteriad into the less sclerotised hyaline projections; endogynium cupshaped, with the spines gathered in two lateral (left and right) groups, posterior endogynial margin forms two broad, partially overlapping lamellae, elliptical or leaf-shaped, partly covering the endogynial opening; distinct broad endogynial lamella covers the posterior part of endogynium ventrally. Male. Sternum with large excipulum open on both ends and formed by the three parallel, longitudinally oriented thickenings, accompanied by the two additional anterolateral ones (left and right); central part of hypostome regularly triangular and moderately sclerotised; hypostomatic setae on a separate piece of cuticle; corniculi slender or extended in the proximal half; fixed digit of chelicera straight and slender with many tiny denticles followed by a lamellar edge, movable digit with a large tooth proximally, and 4–5 smaller teeth distally. Included species: 1. H . hemisphaericus ( Vitzthum, 1923 ) 2. H . rhombogynialis Witaliński, 2006