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The fauna of zerconid mites (Acari: Mesostigmata: Zerconidae) of the Nearctic region is comprehensively revised. All known 69 species grouped in 26 genera occurring in the Nearctic region are examined. Five new genera are proposed: Betaechinozercon gen. nov., Neoechinozercon gen. nov., Paramixozercon gen. nov., Rafaskas gen. nov., and Whartonas gen. nov. Twelve new species are described: Amerozercon briareus sp. nov., Bakeras evansi sp. nov., Microzercon yamoriae sp. nov., Paramixozercon alaskanus sp. nov., P. aoki sp. nov., Rafaskas blaszaki sp. nov., Zercon lucidus sp. nov., Z. manitous sp. nov., Z. morazae sp. nov., Z. raveni sp. nov., Z. oregonus sp. nov., and Z. skorackii sp. nov. The following new combinations are proposed: Blaszakiella mahunkai (Ujvári, 2013) comb. nov., B. pardus (Ujvári, 2013) comb, nov., Paramixozercon jasoniana (Díaz-Aguilar et Ujvári, 2010) comb, nov., P. albertanensis (Díaz-Aguilar et Ujvári, 2010) comb, nov., P. borealis (Díaz-Aguilar et Ujvári, 2010) comb, nov., Betaechinozercon americanus (Błaszak, 1982) comb, nov., Neoblaszakiella alaskaensis (Ujvári, 2013) comb, nov., N. luiseae (Ujvári, 2013) comb, nov., N. nudus (Ujvári, 2013) comb, nov., and Whartonas krantzi (Blaszak, 1980) comb. nov. The genera, Mixozercon Halašková, 1963 and Echinozercon Błaszak, 1976 are excluded from the list of the Nearctic zerconid genera. Keys to the zerconid genera and all Nearctic species are provided. Main aspects of the zoogeography of the family Zerconidae are discussed.
In this study, Prozercon celali sp. nov., collected from Honaz Mountain National Park in Turkey is described and illustrated on the basis of the adults females. Diagnostic characters of Prozercon celali: Postero-lateral tips of peritrematal shields reaching bases of marginal setae R₃ or R₄. Margin of opisthonotum with eight pairs of setae. Setae j1, r1, r4, r6, r7 markedly elongated, densely plumose, brush-like and apically rounded, setae j2, r2, r3 and r5 pilose or plumose, other podonotal setae short, smooth and neddle-like. Setae J₁–J₅, Z₁–Z₄ and S₁ plumose and apically tapering, seate J₆, S₂ and S₄ densely plumose, brush-like and apically rounded. Setae S₃ absent. Setae R₁–R₈ and Z₅ short and smooth. Dorsal cavities are distinct, sclerotized, equal in size and form. Additionally, a key to the adults of genus Prozercon known from Turkey is given.
Neomicrozercon nearcticus gen. et sp. nov., a new genus and species of zerconid mites (Acari: Mesostigmata: Zerconidae) are described based on material of both sexes collected in the United States of America (Oregon).
In this study, a new species of zerconid mites, Zercon anatolicus, is described and illustrated on the basis of material collected from Turkey. Diagnostic characters of Zercon anatolicus: Anterior margin of ventro-anal shield with two pairs of setae. Dorsal cavities of general size and appearence, star-like with undulated and weakly sclerotised on their anterior margin. Pores Po3 situated beetwen setal rows J and Z, on the line connecting setae Z4–J3 located closer to the setae Z4. Pores Po4 lie on the line connecting the base of setae S4–Z5. Setae J1–J5, Z1, Z2, Z5, S1–S3 and R1–R7 short and smooth. Setae J6, Z3–Z4 and S4 long and barbed with hyaline ending. Setae J6 the longest opisthonotal setae (63–76 µm). Opisthonotal shield with distinct reticulate pattern in the anterior region and punctuate pattern in the posterior region. A key to the adults of Zercon species known from Turkey is also given.
Blaszakiella americana gen. et sp. nov., a new genus and species of zerconid mite (Acari: Mesostigmata: Zerconidae) is described and figured. This new genus differs from the closely related Microzercon Blaszak, 1976 by the presence both of small adgenital shields with openings of adgenital glands gv2. A key for females of Zerconidae genera in the Nearctic Region is provided.
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