Metapterodectes Mironov, 2008

Mironov, Sergey & González-Acuña, Daniel, 2011, New feather mites of the subfamily Pterodectinae (Acariformes: Proctophyllodidae) from passerines (Aves: Passeriformes) from Chile and Cuba, Zootaxa 3057, pp. 1-48 : 42-43

Genus Metapterodectes Mironov, 2008

Type species: Metapterodectes furnarius Mironov, 2008 by original designation.

Diagnosis. BOTH SEXES. Vertical setae ve absent. All hysterosomal setae present. Prodorsal shield covering most part of prodorsum, with well developed posterior angles. Scapular shields narrow. Humeral shields absent or represented by minute rudimentary sclerites on ventral surface near setae cp. Setae c2 situated dorso-laterally on striated tegument. Setae wa anterior to setae la and ra on tarsi I, II. Seta gT of tibia I in distal half of segment. Setae cG and mG on genua I,II setiform. Solenidion σ 1 of genu I much shorter than solenidion ω 3 of corresponding tarsus. Femora I, II usually bear ventral crests, other segments of these legs without processes and other modifications. Seta sR of trochanters III absent; solenidion σ 1 of genu III absent. Supranal concavity usually distinct.

MALE. Epimerites I fused into a narrow U, fused part not connected with epimerites II. Coxal fields II–IV open; epimerites II and IV without extensive sclerotized areas. Opisthosomal lobes moderately elongated, approximately as long as wide, with roughly rounded posterior margin. Terminal cleft as a wide inverted U. Setae h3 short, narrowly lanceolate or spiculiform, situated on lobar apices. Setae h1 situated anterior to bases of opisthosomal lobes. Setae ps1 setiform, minute. Genital arch with well developed branches, situated at level of trochanters IV; aedeagus sword-shaped, much (2.5 or more times) longer than genital arch. Genital papillae anterior to genital arch. Pregenital apodeme, paragenital apodemes, genital shield and other sclerotized structures around genital apparatus absent. Setae 4a situated on soft tegument of coxal fields IV. Opisthoventral shields present, relatively wide. Corolla of anal suckers without indentations; suckers surrounded by membrane with radial striation. Adanal shields absent. Setae ps3 postero-lateral or lateral to anal suckers, situated on opisthoventral shields. Setae g and ps 3 in high trapezoid arrangement. Legs I slightly thicker and longer than legs II. Legs III and IV subequal in size. Solenidia φ of legs III, IV subequal. Tarsus IV without apical claw-like process, setae d and e button-like.

FEMALE. Epimerites I fused into a narrow U. Lobar region of opisthosoma clearly separated from remaining part of opisthosoma; opisthosomal lobes well developed, with long terminal appendages. Hysteronotal shield completely split into anterior and lobar shields. Macrosetae h2 with spindle-like basal part and filiform apical part. Epigynum horseshoe-shaped, large. Apodemes of oviporus separated from epimerites IIIa. Translobar apodemes present. Setae ps2, ps3 sucker-like or filiform (in M. leptasthenurae ), arranged in transverse rectangle or low trapezium, both pair situated at level of anal opening. Legs I slightly thicker and longer than legs II. Legs III, IV subequal in size; genu IV dorsally inflated. Solenidia φ of tibiae III much longer than on tibiae IV.

Remark. Up to now, the genus Metapterodectes included only two species ( Mironov et al. 2008; Valim & Hernandes 2008). This genus clearly differs from the genera Amerodectes and Tyrannidectes, the two closest genera of the Pterodectes complex, by the simultaneous absence of solenidion σ 1 and seta sR on legs III ( Fig. 23 H). Metapterodectes furnarius Mironov, 2008 and the new species described below are associated with ovenbirds (Tyrannida: Furnariidae ); and M. muticus ( Banks, 1909) was described from the Vesper Sparrow Pooecetes gramineus (Gmelin) (Passerida: Emberizidae ).

Redescriptions of previously known Metapterodectes species are given in the papers by Mironov et al. (2008b) and Valim and Hernandes (2008, 2010).

Figures

FIGURE 23. Tyrannidectes and Metapterodectes species, details. A – E — Tyrannidectes cinclodes sp. n., F – K — Metapterodectes leptasthenurae sp. n. A, B — legs I – II of male, C — tibia and tarsus IV of male, D — femur and genu IV of female, E — spermatheca and spermaducts, F – H — legs I – III of male, I — tibia and tarsus IV of male, J — femur and genu IV of female, Kspermatheca and spermaducts.