Occigamasus, a new genus of pergamasine mites, with description of two new species from the west coast of North America (Parasitiformes: Gamasina: Parasitidae) Author Juvara-Balş, Ilinca Muséum d’histoire naturelle, CP 6434, Genève 6. Switzerland. text Acarologia 2019 2019-12-13 59 4 551 570 http://dx.doi.org/10.24349/acarologia/20194354 journal article 10.24349/acarologia/20194354 2107-7207 5173912 D9D1B3C7-98C9-4284-9F53-8D451D4746E5 Occigamasus lindquisti n. sp. Zoobank: C72F41AF-161A-48F9-8413-EB6A549EE64F Figs. 1–6 Type material — Canada . British Columbia (B. C.), Vancouver Island : Holotype : 1 female , Cowichan Lake , Experimental Station , mixed Douglas fir, alder, fern litter, 25 July 1975 . Paratypes : 2 females , 1 male , same data as holotype ; Cowichan Lake Experimental Station , Mesachie Lake : 1 male , 2 females , Douglas fir litter, 24 July 1975 ; 1 female , from moss, herbs on log; 3 females , moss on rock; 1 male , 2 females , from mixed cedar deciduous shrub litter, 25 July 1975 ; 1 male , from alder, crab apple litter, 8 July 1975 . Other material examined. Canada . Vancouver Island (B. C.): 2 males , 2 females , Miracle Beach Provincial Park, from Douglas fir shrub litter, 10 July 1975 . U.S.A. , Oregon Curry County: 3 males , 3 females , Loeb State Park, 8 miles NE, from tan oak, willow, fern litter, 12 July 1985. Diagnosis — Length of idiosoma: 936– 940 female , 768– 816 male . Both sexes: gnathotectum with three simple prongs, the central one slightly shorter than the lateral ones. Female: epigynial spindle-like structure 72 long; endogynium a double sack with two curved prongs on its posterior margin and one or two denticles on lateral walls; sternal shield with gland pores gv1 located medially on posterior margin; on tarsus IV seta pd2 , 240 long. Male: armature of leg Figure 1 Occigamasus lindquisti n. sp. , female: A–C, F. male: D, E. A, D – Podonotum; B, E – Opisthonotum; C – Submarginal setae UR on lateral cuticle; F – Opisthogaster. Figure 2 Occigamasus lindquisti n. sp. , female: A – Sternal shield; B – Tritosternum; C – Paragynia and epigynium; D – Subapical structure of epigynium; Endogynium, E – dorsal view; F – ventral view. Figure 3 Occigamasus lindquisti n. sp. , female: A–E. male: F. A – Gnathosoma, ventral view; B – Palpfemur and palpgenu; C, F – Gnathotectum; D – Chelicera; E – Dorsal seta of fixed digit. II with simple rounded protuberance on genu, triangular spur on tibia and a basal protuberance on femoral apophysis; on tarsus IV seta pd2 , 190–216 long. Etymology — The species is dedicated to the eminent acarologist Evert E. Lindquist who collected the mites and gave us the opportunity to study the material.