Zerconopsini, Makarova & Marchenko & Lindquist, 2021

Makarova, Olga L., Marchenko, Irina I. & Lindquist, Evert E., 2021, Distribution, habitats, and redescription of the rare mite species Iphidonopsis sculptus Gwiazdowicz, 2004 (Mesostigmata: Ascidae), Zootaxa 4952 (3), pp. 448-464 : 450

Zerconopsini tribe n.

Type genus: Zerconopsis Hull, 1918 .

Diagnosis. Adult dorsal shield entire, often fully covering body dorsum, with or without lateral incisions, its setae mostly simple but usually some (1–8 pairs) paddle-shaped, rarely setae j 1, z 1 and often seta J 5 serrated or pilose. Sternal or sternitigenital shield consolidated with endopodal sclerites between coxae I–II and II–III but usually not connected with free endopodal strips between coxae III–IV. Female with ventrianal shield bearing 1–6 pairs of opisthogastric setae but never expansive enough to include metapodal platelets and setae JV 1; rarely, broad anal shield present bearing only three circumanal setae ( Iphidonopsis ). Peritreme long, its margins often crenulate. Subcapitulum with deutosternum wide or of moderate width; hypostomatic setae hp -1 and usually hp -3 elongated, often whip-like, 2–5 times longer than distance between them. Palp tarsus without distinct macroseta but apically with two distinct sensillae—large erect one with truncated tip, and curved “S”-like sensilla ( Fig. 10 ). Palp trochanter internal seta whip-like, often much (3–6 times) longer than external seta (as an exception, 1.5 times in one undescribed Zerconopsis species). Male spermatodactyl of different length, tube-like, sometimes with membranous frenulum. Tarsus I with or without claws. Genu III usually plesiomorphically with eight setae (pv -1 present); tarsi II–IV each with dorso-proximal setae ad -2, pd -2 elongated, curved; males of few Zerconopsis species have ventral seta mv on tarsus II modified, thickened and attenuated. Genera included: Zerconopsis , Xenoseius , Iphidonopsis .

Figures

FIGURES 7–10. Iphidonopsis sculptus Gwiazdowicz, 2004, female. 7. Idiosomal dorsum, 7a—chaetome variation; 8. Cheliceral digits; 9. Gnathotectum; 10. Palp tibia and tarsus (complete setation not shown).