To the knowledge of the genus Sadocepheus (Acari, Oribatida, Compactozetidae) Author Ermilov, Sergey G. Tyumen State University, Tyumen, Russia ermilovacari@yandex.ru Author Corpuz-Raros, Leonila Institute of Weed Science, Entomology and Plant Pathology, College of Agriculture and Food, and Museum of Natural History, University of the Philippines Los Baños, Los Baños, Philippines lacraros@gmail.com text Ecologica Montenegrina 2017 2017-07-08 11 28 36 journal article 10.37828/em.2017.11.7 2336-9744 13238875 urn:lsid:zoobank.org:pub:51725F56-87A9-43F3-A0E6-81F2F2EA43F8 Genus Sadocepheus Aoki, 1965 Type species: Sadocepheus undulatus Aoki, 1965 Adult . Compactozetidae (as Cepheidae in Sitnikova 1975b and Norton & Behan-Pelletier 2009 ). Body broad, medium sized or large, covered by thick layer of amorphous cerotegument, surface without heavy ornamentation and sculpture. Rostrum rounded. Lamellae long and very broad, located dorsolaterally and usually well separated, rounded, truncate or bifurcate distally. Translamella absent or present. Tutoria present. Prodorsal setae setiform, ro inserted on prodorsum, le on the lamellar ends, in mediobasally on the lamellae or in the interlamellar region. Bothridial setae of medium size or long, lanceolate, fusiform, clavate, bacilliform or brush-shaped. Anterior notogastral margin present or absent. Humeral regions of notogaster with triangular, quadrangular or bifurcate expansions. Notogaster with nine or ten pairs of setiform setae inserted on notogastral surface or tubular apophyses, dorsal setae c , la , lm , lp , h 2 , h 3 located laterally, setae h 1 , p 1 – p 3 posteriorly on the notogaster, centrodorsal notogastral part without setae. Subcapitular setae setiform. Palps setation 0–2–1–3–9(+ω), solenidion fused to distal seta mediodistally. Axillary saccules present. Chelicerae with two setiform setae inserted close to each other dorsally. Trägårdh’s organ tapered. Epimeral setal formula 3–1–3–3. Pedotecta I represented by large laminae, pedotecta II quadrangular in ventral view. Discidia strong, elongate triangular. Six to nine pairs of genital, one pair of aggenital, two pairs of anal and three pairs of adanal setae setiform. Adanal lyrifissures located close to anal aperture, in paraanal or inverse apoanal positions. Legs monodactylous. Juvenile instars . Not known.