Occigamasus lindquisti, Juvara-Balş, 2019

Juvara-Balş, Ilinca, 2019, Occigamasus, a new genus of pergamasine mites, with description of two new species from the west coast of North America (Parasitiformes: Gamasina: Parasitidae), Acarologia 59 (4), pp. 551-570 : 553-557

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

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.

Figures

Figure 1 Occigamasus lindquistin. 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 lindquistin. 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 lindquistin. 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.

Figure 4 Occigamasus lindquistin. sp., female: Leg II: A – Tarsus; B – Tibia and genu; C – Femur. Leg III: D – Tarsus; E – Tibia; F – Genu and femur; G – Trochanter.

Figure 5 Occigamasus lindquistin. sp., female: Leg IV: A – Tarsus; B – Tibia; C – Genu; D – Femur; E – Trochanter.

Figure 6 Occigamasus lindquistin. sp., male: A – Chelicera; B – Sternogenital shield. Leg II: C – Tibia; D – Genu and femur.