Aeroppia magnipilosa ( Ewing, 1909 )

Ermilov, Sergey G., 2016, Contribution to the knowledge of the oribatid mite genus Aeroppia (Acari, Oribatida, Oppiidae), Zootaxa 4138 (2), pp. 349-362 : 360-361

Aeroppia magnipilosa ( Ewing, 1909)

( Figs 17–19 )

Supplementary description (based on two specimens from the personal collection of Prof. Dr. Roy A. Norton, State University of New York, College of Environmental Science & Forestry, Syracuse, New York, USA).

Measurements. Body length: 747, 796 (2 specimens: 2 females); notogastral width: 464, 498 (2 specimens).

Integument ( Figs 17, 19 ). Body color light brownish. Body surface, subcapitular mentum and genae, genital and anal plates, and legs punctate. Lateral parts of body with small, dense cerotegumental tubercles (diameter of tubercles up to 6).

Prodorsum ( Figs 17, 19 ). Rostrum broadly rounded. Rostral (102–110), lamellar (106–114), interlamellar (139–147) and exobothridial (57–65) setae setiform, barbed; in slightly thicker than ro and le, ex thinnest, le located close to each other, divergent medio-distally. Bothridial setae (41–45) lanceolate, distinctly pointed distally, barbed, stalks shorter than heads. Longitudinal rows of muscle sigillae well visible anteriad to bothridia. Interbothridial muscle sigillae distinct. Lateral ridges well developed, clearly not reaching acetabula IV.

Notogaster ( Figs 17, 19 ). Thirteen pairs of notogastral setae, h 1 present. Setae da, la, dm, lm, dp, lp (155–164) and h 2 (127–131) long, setiform, thickened, barbed, h 1 (73–82) setiform, thin, barbed, p 1 (65–77) slightly dilated medio-distally, barbed, c (57–61), p 2 and p 3 (24–32) short, thin, smooth. Lyrifissures ia well developed, im and ips poorly visible, ih and ip not visible. Opisthonotal gland openings located laterally and distanced from im.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae similar to Aeroppia consimilis . Size of subcapitulum: 151–155 × 102–106. Two pairs of subcapitular setae (h, m) and two pairs of adoral setae setiform, barbed, subcapitular setae a thickest, stiff, barbed, h (69) longer than m (53–57), a (28) and or 1, or 2 (12–16). Length of palps: 110. Postpalpal setae (6) spiniform. Length of chelicerae: 151–155. Cheliceral setae setiform, barbed, cha (49) straight, chb (32–36) slightly curved in median parts. Trägårdh’s organ tapered, indistinctly granulate.

Lateral podosomal and epimeral regions ( Figs 18, 19 ). Epimeral setae setiform barbed, 3c (98–106) longer than 1b, 3b, 4a (86–98), 1a and 4c (57–61), 4b (41) and 1c (24–28), 2a and 3a minute (4). Discidia slightly rounded distally.

Anogenital region ( Figs 18, 19 ). Five pairs of genital (24–32), one pair of aggenital (65–69), two pairs of adanal (ad 2, ad 3, 57–61) and two pairs of anal (49–53) setae setiform, barbed. Right genital plate with six genital setae in one specimens. Adanal setae ad 1 (61–69) slightly dilated medio-distally, barbed. Adanal lyrifissures distinct.

Legs. Morphology of leg claws, segments, setae and solenidia and the leg formulas similar to Aeroppia friedrichi sp. nov., but trochanter III only with one seta (the second seta and its alveolus absent) ( Table 1 ).

Material examined. Two specimens (2 females): U.S.A., Missouri Boone Co., Columbia, Hinkson Valley, within S. University Missouri campus, litter in hedgerow, under buckeye shrubs, 21.V.1980 (R.A. Norton).

Figures

FIGURES 17 – 19. Aeroppia magnipilosa (Ewing, 1909), adult: 17 — dorsal view (gnathosoma and legs except trochanters III and IV not shown); 18 — ventral view (gnathosoma and legs not shown), 19 — lateral view (legs not shown). Scale bar 100 µm.