Atrichophyllodes, Hernandes & Valim & Mironov, 2007

Hernandes, Fábio A., Valim, Michel P. & Mironov, Sergey V., 2007, Two new genera and five new species of the feather mite subfamily Proctophyllodinae (Astigmata: Proctophyllodidae) from suboscine birds in Brazil, Journal of Natural History (J. Nat. Hist.) 41 (41 - 44), pp. 2653-2681 : 2661-2662

Genus Atrichophyllodes gen. n.

Type species: Atrichophyllodes delalandi gen. n., sp. n.

Differential diagnosis

The new genus, Atrichophyllodes , is similar to Nycteridocaulus Atyeo (1966) in the following characters in males: terminal lamellae are wide and short, almost semicircular, genital arch is much wider than long, legs III and IV subequal in size and not hypertrophied; epimerites I free. Atrichophyllodes gen. n. is readily distinguished from the latter genus by the absence of idiosomal setae d2 and e2, and by the branches of genital apparatus forming a low arch (rather than a bat-shaped structure, as in Nycteridocaulus ). This genus also resembles Tyranniphyllodes gen. n. (see above) in the absence of hysterosomal setae d2 and e2; however, it differs from Tyranniphyllodes gen. n. by having a sword-shaped aedeagus sheath, a trochanteral seta sRIII, a uniquely shaped prodorsal shield (in both sexes), and by males lacking an opisthogastral shield.

Description

Both sexes. Moderately elongated proctophyllodids. Prodorsal shield entire, covering nearly the entire prodorsum, with acute antero-lateral extensions, posterior angles rounded. Scapular setae si and se arranged in transverse line. Humeral shields well-developed dorsally, encompassing bases of setae c2 and cp. Epimerites I free, their posterior parts close to each other. Epimerites IIa L-shaped, bent to median line. Hysteronotal setae d2 and e2 absent. Solenidion S 1 of genu I slightly longer than v 3 on tarsi I, situated in median part of the segment ( Figure 17 ). Setae wa anterior to setae la and ra on legs I and II ( Figures 17, 18 ). Segments of legs I and II without processes or other modifications.

Male. Scapular setae se and si situated on prodorsal shield. Opisthosomal lobes short and wide; posterior margin of lobes with semi-circular terminal lamellae. Supranal concavity well expressed. Setae h3 setiform, much shorter than macrosetae h2. Setae h1 anterior to the level of setae ps2. Coxal fields I– IV open, without extensive sclerotized areas. Genital organ at level of trochanters IV; genital arch large and low, sheath of aedeagus approximately twice longer than arch. Adanal shields present, situated between anal suckers and setae ps3, weakly connected to each other anterior to anal opening. Genital acetabula at level of genital arch apex, acetabular plates surrounding these acetabula present or absent. Anal suckers cylindrical, corolla dentate. Pregenital and paragenital plates absent. Opisthoventral shields not developed. Legs III and IV subequal, not hypertrophied. Tarsus IV without apical claw-like process, modified setae d and e buttonlike.

Female. Lobar region of opisthosoma clearly separated from hysterosoma, opisthosomal lobes well developed, with long terminal appendages. Anterior hysteronotal and lobar shields separated by narrow band of striated tegument. Supranal concavity absent. Macrosetae h2 setiform, long. Epigynium horseshoe-shaped, large. Translobar sclerites present. Legs III and IV subequal in size; segments without modifications; solenidia ϕ of tibiae III and IV subequal in length.

Etymology

Contraction of a (without, G.), tricho (hair, G.), and Proctophyllodes to point out the absence of dorsal setae d2 and e2.

Figures

Figures 17–21. Atrichophyllodes delalandi gen. n., sp. n. (17–20) Male legs I–IV, dorsal views. (21) Female spermatheca. pd, primary duct; sd, secondary ducts.