Cingulacarus Elsen, 1975

Kazemi, Shahrooz & Klompen, Hans, 2024, Description of the second species of Cingulacarus Elsen (Acari, Mesostigmata, Diplogyniidae), and notes on the genus, Zootaxa 5397 (2), pp. 225-238 : 226

Genus Cingulacarus Elsen

Cingulacarus Elsen, 1975: 348 . Type species Cingulacarus gangeticus Elsen, 1975 , by monotypy.

Diagnosis (adults). Dorsal shield oval shaped, covering whole dorsum, slightly bent to venter posteriorly; with 32–39 pairs and one unpaired (j2) setae; setae heterogeneous in shape and size, including 5–6 pairs of elongated submarginals, 2–3 pairs on podonotal and three pairs on opisthonotal areas of shield, posterior pair longest. Tritosternal laciniae fused for more than half of their length, plumose. Female sternal and metasternal shields fused, moderately narrow medially, arched ( Figures 3–4 and 18 ); with three pairs of setae, st1 and st3 inserted at the same level on anterior margin of shield. Latigynal shields subtriangular, twice as long as wide, each with two setae; mesogynal shield small, somewhat elongate trapezoidal ( Figure 5 ) and free. Vaginal sclerites without lateral projections ( Figure 4 ). Ventrianal shield expansive and fused with exopodal and peritrematal shields, posteriorly sub-triangular, extending almost to posterior margin of idiosoma; shield hypotrichous, with six pairs of setae including one pair of para-anals inserted at anterior level of anus, anterior ventrianal setae (Jv1) intercoxal. Ventrimarginal shields large, laterally flanking ventrianal shield, narrowly fused to each other posteriorly, and to peritrematal (at level of coxae II) and dorsal shield anteriorly; each shield with 1–8 setae: single Zv4 seta always present, seven posterior R -series setae may be captured by either ventrimarginal or dorsal shield. Peritremes long, extending to coxae I. Two porous areas present dorsolateral to peritremes at level of coxae I and II. Hypostomal region unspecialised, similar in male and female; hypostomal setae simple, h3 inserted almost between h 1–2 in an oblique line; subcapitular setae pectinate ( Figure 8 ). Excrescences on moveable digit of chelicera in female different from those of male: movable digit of chelicerae in female with three brushy excrescences, and a comb-like structure slightly longer than movable digit ( Figures 11–12 ), but in male with two brushy excrescences and a scoop-like process ( Figure 13 ). Setae pd1 on genua III–IV elongated ( Figures 16–17 ); setae ad1 and pd1 on tarsi II–IV lanceolate ( Figure 16 , inset).

Figures

FIGURES 3–6. Cingulacarus kermanensis sp. nov. 3. Female, sternitigenital region; 4. Female, sternal shield and vaginal sclerites (red arrow: minute spines on presternal soft cuticle; yellow arrow: pore-like structure between setae st2); 5. Female, latigynal and mesogynal shields (inset: marginal gland); 6. Male, sternitigenital region. Scale bar: 100 µm.

FIGURES 14–18. Cingulacarus spp., female. 14–17. Cingulacarus kermanensis sp. nov. 14. Peritrematal shield; 15–16. Legs II–III, excluding coxa-trochanter; 17. Leg IV, genu; 18. Cingulacarus gangeticus Elsen, sternitigenital region, holotype. Scale bar: 100 µm.

FIGURES7–10.Cingulacarus kermanensissp. nov., gnathosomal structures.7.Female,gnathotectum;8. Female, subcapitulum; 9. Female, palp; 10. Male, palp femur. Scale bar: 50 µm.

FIGURES 11–13. Cingulacarus kermanensis sp. nov. 11. Female, chelicera; 12. Female, chelicera, DIC image; 13. Male, chelicera. Scale bar: 50 µm.