Kongsbergia setosa, Radwell & Smith, 2012

Radwell, Andrea J. & Smith, Ian M., 2012, North American members of the reticulata-like species group of the water mite genus Kongsbergia (Acari: Hydrachnidiae: Aturidae), Zootaxa 3540, pp. 1-49 : 16-18

Kongsbergia (s.s.) setosa sp. nov.

( Figs. 23–27, 87–89)

Description. Character states of the setosa subgroup. Male: Idiosoma in dorsal view elongate and ellipsoidal, usually widest near midlength. Dorsal shield ( Figs. 23, 87) with anterior margin nearly transverse or slightly convex and crenellate with a small medial projection or a very small depression medially ( Figs. 23a and 23b arrows) but lacking a nipple- or dome-shaped projection; edge of shield linear or slightly convex in area between eyes and humeral region and with a modest humeral angle; with reticulate sculpturing weakly developed and diffuse in area between and anterior to postocular setae; posterior edge of shield conspicuously indented to form a shallow notch; anteromedial hump moderately large, lateral ridges moderately well developed and meeting lateral edges of shield near midlength, posterior depression moderately deep; ridge bearing excretory pore moderately well developed; bearing three pairs of long, curved, thick setae on posterior edge; variable in color from colorless to yellowish with red or purple patches anteriorly and posteriorly. Ventral shield ( Figs. 25, 88) with projections covering insertions of fourth legs well developed; conspicuously indented posteriorly to form a concave notch bearing gonopore and bearing paired patches of numerous, long, thick, curved setae on posterior edge flanking gonopore. Pedipalp ( Fig. 26) with femur enlarged and bearing three papillate projections proximoventrally. Fourth leg ( Fig. 27) with segments and setae as illustrated. Female: Dorsal shield ( Figs. 24, 89) similar in shape, sculpturing and color to that of male but with ridges relatively weakly developed; anterior margin with or with a small medial projection ( Figs. 24a and 24b arrows); lacking long, curved setae on posterior edge. Ventral shield with projections covering insertions of fourth legs smaller than in male and lacking patches of curved setae on posterior edge. Pedipalp with femur not enlarged and tibia proportionally longer than in male Measurements: Male (n=5): Length/width dorsal shield 320–330(320)/254–290(272), length/width ventral shield 346–370(352)/ 264–290(280). Lengths pedipalp segments: Tr 21–24(23), Fe 72–92(92), Ge 28–34(28), Ti 100–106(106), Ta 30–34(30). Height pedipalp femur 65–88(88). Lengths leg segments: IGe 61–65(61), ITi 78–88(88), ITa 82–95(90); IIGe 63–72(64), IITi 83–89(86), IITa 75–90(92); IIIGe 77–88(84), IIITi 93–98(98), IIITa 95–96(96); IVTr 72–80(72), IVBFe 85–96(85), IVTFe 69–76(70), IVGe 85–89(88), IVTi 79–88(86), IVTa 72–85(82). Female (n=5): Length/width dorsal shield 312–352/260–280, length/width ventral shield 320–352/260–292. Lengths pedipalp segments: Tr 22–26, Fe 65–69, Ge 27–30, Ti 105–110, Ta 30–32. Lengths leg segments: IVTr 58–65, IVBFe 67–75, IVTFe 55–58, IVGe 68–74, IVTi 79–84, IVTa 79–86.

Types. Holotype: Male from Papineau Creek at Maple Leaf , Hastings Co., Ontario , Canada, 10–11 June 1981 by IMS (slide) . Paratypes: CANADA: New Brunswick: Charlotte Co.: Digdeguash River at Rolling Dam , 2 October 1984, IMS and S.C. Smith – 1 male (slide). Digdeguash River beside road from Digdeguash to Elmsville, 2 October 1984, IMS – 6 males, 6 females (slides), 4 males, 18 females (GAW) . Nova Scotia: Lunenburg Co.: LaHave River beside road to Hwy 10 just west of Bridgewater , 26 September 1984, IMS – 1 male, 1 female (slides). LaHave River beside Hwy 10 at Hwy 103 bridge, 9 October 1989, IMS – 2 males (slides) . Ontario: Hastings Co.: same data as holotype, IMS – 7 males, 7 females (slides), 9 males, 41 females (GAW). Opeongo River beside Hwy 60, Madawaska, 29 August 1981, IMS – 11 males, 8 females (GAW). Peterborough Co. : Eels Creek crossing Hwy 28 at picnic area just north of Woodview , 13 June 1981, IMS – 1 male, 9 females (GAW) . USA: Alabama: DeKalb Co.: same data as holotype– 6 males, 3 females (slides), 7 males, 12 females (GAW) . Georgia: Dawson Co.: Amicalola River beside Rt. 53 between Dawsonville and Marble Hill, 1 October 1992, IMS – 2 males (slides) . Maine: Aroostook Co.: Wytopoilock Stream beside Rt. 2A ca. 7 miles northeast of Macwahoc , 5 September 1968, DRC – 1 male (GAW). Coldbrook beside Rt. 2, 3.7 miles south of Island Falls , 19 June 1969, HH – 1male, 1 female (slides, NBM, CNC), 1 female (GAW, NBM, CNC). Aroostook River beside Rt. 11 at bridge over river, Ashland, 4 July 1989, IMS – 1 male, 3 females (GAW). Washington Co.: Machias River beside Rt. 9, 24.7 km east of Hancock Co. Line , Machias Forest Camp, 10 September 1992, IMS – 2 males, 1 female (slides), 4 males (GAW) . New Hampshire: Coos Co.: Upper Ammonoosuc River at picnic area beside Rt. 110 ca 1 km east of Stark , 5 July 1989, IMS – 1 male (slide) . New York: Essex Co.: Boreas River beside Rt. 28N, 13.8 km northwest of Morse Memorial Parkway , Minerva , 21 June 1990, IMS – 2 males, 2 females, 1 deutonymph (slides), 3 males, 13 females (GAW). Hamilton Co. : East Branch of Sacandaga River beside Rt. 8, 3.5 km northeast of Rt. 30, 7–8 July 1989, IMS – 2 males, 3 females (slides), 5 females (GAW). Warren Co. : East Branch of Sacandaga River beside Rt. 8, 14.5 km east of Rt. 30, 21 June 1990, IMS – 1 male (slide) . West Virginia: Pocahontas Co.: East Fork of Greenbrier River beside Rt. 28 north east of Thornwood , Island Campground , 16 July 1990, IMS – 6 males, 5 females (slides), 4 males, 3 females (GAW) .

Etymology. From the Greek setose meaning “adorned with setae” to describe the paired patches of numerous, long, curved setae on the ventral shield flanking the gonopore.

Distribution. Streams of New Brunswick, Nova Scotia, and Ontario in Canada; Alabama, Georgia, Maine, New Hampshire, New York, and West Virginia in USA.

Remarks. Males of Kongsbergia setosa sp. nov. differ conspicuously from those of all other North American species of the genus in having paired patches of numerous, long, curved setae on the posterior edge of the ventral shield flanking the gonopore. Males and females of most populations have a medial projection on the anterior margin of the dorsal shield but this projection is absent in members of some populations.