Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus Author Norton, Roy A. State University of New York, College of Environmental Science and Forestry, Syracuse, New York, 13210, USA. Author Behan-Pelletier, Valerie M. Invertebrate Biodiversity Program, Research Branch, Agriculture and Agri-Food Canada, K. W. Neatby Bldg., Ottawa, Ontario, Canada. text Acarologia 2020 2020-05-11 60 2 398 448 journal article 8260 10.24349/acarologia/20204375 1d0971e8-a0d9-4e39-921b-0de44a0a6e3c 2107-7207 4487919 393A73A9-253B-4A24-8635-C54C22326D10 Caleremaeus nasutus n. sp. Zoobank: 38F837A3-7D6C-4D2C-B339-D4183DA29EBB Etymology — The Latin species epithet ‘nasutus’ is an adjective referring to the large nose-like anterior lobe of the prodorsum. Material examined — Holotype and 13 paratype adults from: USA , Alabama , Randolph Co., State Route 48, ca. 1 km east of Woodland (33° 22.8 ஥ N, 85° 23.4 ஥ W);, 3.xii.1980 , R .A. Norton col., from litter layer in young shortleaf pine ( Pinus echinata Mill. ) and mixed-oak ( Quercus spp.) forest. Other material: Another 75 paratype adults are from Alabama , Lee Co., near Auburn, 7.xi.1975 (collector unknown), from litter in loblolly pine ( Pinus taeda Linn. ) forest. Holotype and 10 paratypes deposited in USNM ; 15 paratypes in CNC , remainder in RNC . Diagnosis — Caleremaeus species with adults having total length 284–348 µm . Prodorsum without cusp or distinct lamella; lamellar setae inserted on large, hollow, tongue-shaped anterior lobe; tutorium weakly developed, enantiophysis eA present; usually with single small pair of dorsosejugal tubercles. Notogastral setae small (mostly ~ 10–15 µm ), most barbed and curled beyond basal cerotegument nodule. Epimeral groove 2 without bordering tubercles or knots; ventrosejugal groove with only simple enantiophysis eS . Genital setation variable; females usually with five, males with 4–6 setae on each plate. Leg femora each with porose area. Juveniles unknown. Adult Figures 13–17 Dimensions — Total length of 20 paratypes 284–348 µm (mean 326); maximum width 162–196 µm (mean 180). Female (n = 10) length 336–348 µm (mean 342), maximum width 186–196 µm (mean 191); male (n = 10) length 284–323 µm (mean 309), width 162–181 µm (mean 169). Integument, setae — Cerotegument excrescences mostly in form of dome- to mushroomshaped or near-spherical excrescences, but partly irregular in form ( Figs 14 , 16A, B, H ); largest on notogaster (mostly 3–5 µm diameter), smallest ( 1–2 µm ) on venter where microgranules cover and fill intervening space ( Fig. 14 C–D). Dorsal setae (except bs ) short, inconspicuous, acute to acuminate; basal third hyaline, birefringent, smooth, straight, surrounded by distinct and usually shaded cerotegument nodule; distal region isotropic, pigmented, curved to curled, with minute barbs on outer curvature ( Fig. 16A, B, D ), sometimes pulled away during preparations ( Fig. 16C ). Ventral setae (except adanal series) simple, nearly straight, without pigment or distinct basal cerotegument nodule.