Aeroppia friedrichi, Ermilov, Sergey G., 2016

Ermilov, Sergey G., 2016, Contribution to the knowledge of the oribatid mite genus Aeroppia (Acari, Oribatida, Oppiidae), Zootaxa 4138 (2), pp. 349-362 : 351-356

Aeroppia friedrichi sp. nov.

( Figs 1–10 )

Diagnosis. Body size: 614–647 × 381–415. Rostrum rounded. Lamellar setae inserted close to each other. Bothridial setae fusiform, barbed, shorter than interlamellar setae and similar to exobothridial setae in length. Twelve pairs of notogastral setae present, h 1 absent, dorsal setae long, setiform, thickened, barbed, h 2 and p 1 shorter, stiff, barbed, c, p 2 and p 3 shortest, thinnest, smooth. Subcapitular setae setiform, barbed. Anal, adanal, genital and aggenital setae setiform, barbed.

Description. Measurements. Body length: 614 (holotype: male), 614–647 (11 paratypes: 9 males and 2 females); notogastral width: 398 (holotype), 381–415 (11 paratypes). No distinct differences in size between females and males.

Integument ( Figs 1 , 3 ). Body color light brownish. Body surface, subcapitular mentum and genae, genital and anal plates, and legs punctate. Centro-dorsal part of prodorsum with sparse cerotegumental tubercles (diameter of tubercles up to 12), lateral parts of body with small, dense cerotegumental tubercles (diameter of tubercles up to 4).

Prodorsum ( Figs 1 , 3 ). Rostrum slightly protruding, rounded. Rostral (ro, 94–106), lamellar (le, 90–98), interlamellar (in, 110–114) and exobothridial (ex, 57–65) setae setiform, barbed; in thickest, ex thinnest, le located close to each other, divergent medio-distally. Bothridial setae (bs, 57–61) fusiform, indistinctly pointed distally, barbed, stalks slightly shorter than heads. Longitudinal rows of muscle sigillae poorly visible anteriad to bothridia. Interbothridial muscle sigillae distinct. Lateral ridges (rl) well developed, clearly not reaching acetabula IV.

Notogaster ( Figs 1 , 3 ). Twelve pairs of notogastral setae, h 1 absent. Setae da, la, dm, lm, dp, lp and h 3 long (147–155), setiform, thickened, barbed, h 2 (73–77) and p 1 (65–69) thinner, stiff, barbed, c, p 2 and p 3 shortest (36– 41), thinnest, smooth. Lyrifissures ia, im and ips well developed, ih and ip not visible. Opisthonotal gland openings (gla) located laterally and removed from im.

Gnathosoma ( Figs 4–6 ). Subcapitulum longer than wide: 131–139 × 106–110. Three pairs of subcapitular setae and two pairs of adoral setae setiform, barbed, h (61–69) longer than m (45–53), a (20–24) and or 1, or 2 (16– 20). Length of palps: 102–106. Postpalpal setae (6) spiniform. Length of chelicerae: 131–139. Cheliceral setae setiform, cha (36–41) straight, with long cilia unilaterally, chb (26) slightly curved in median parts, barbed. Trägårdh’s organ (Tg) tapered, indistinctly granulate.

Lateral podosomal and epimeral regions ( Figs 2 , 3 ). Epimeral setae setiform barbed, 3c and 4c (98–102) longer than 1b, 4a (65–73), 1a, 3b, 4b (49–53), 1c, 2a and 3a (32–41). Discidia rounded distally.

Anogenital region ( Figs 2 , 3 ). Five pairs of genital (g 1– g 5, 28–32), one pair of aggenital (ag, 53–61), three pairs of adanal (ad 1– ad 3, 53–57) and two pairs of anal (an 1, an 2, 41–45) setae setiform, barbed. Setae ad 1 slightly thicker than ad 2 and ad 3. Adanal lyrifissures (iad) distinct.

Legs ( Figs 7–10 ). Claws slightly serrate on dorsal sides. Formulas of leg setation and solenidia: I (1–5–2–4– 20) [1–2–2], II (1–5–2–4–16) [1–1–2], III (2–3–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 1 . Setae p setiform on tarsi I, and very short, conical on tarsi II–IV.

Note: Roman letters refer to normal setae, Greek letters to solenidia (except ɛ = famulus). Single prime (') marks setae on the anterior and double prime (") setae on the posterior side of a given leg segment. Parentheses refer to a pair of setae. Tr—trochanter, Fe—femur, Ge—genu, Ti—Tibia, Ta—tarsus.

Material examined. Holotype (male) and 11 paratypes (9 males and 2 females): Peru, 09°37'S, 74°56'W, Huánuco Department, Puerto Inca Province, Yuyapichis District, Área de Conservación Privada, Panguana (biological field station), nearby Rio Yuyapichis (river), 230–260 m a.s.l., upper soil and leaf litter in the primary evergreen lowland rainforest, Winkler extraction, 20.IX.2013 – 07.X.2013 (S. Friedrich and F. Wachtel).

Type deposition. The holotype is deposited in the collection of the Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Lima, Peru; 11 paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology. The specific name is dedicated to my friend and colleague, zoologist, Dr. Stefan Friedrich (Zoologische Staatssammlung München, München, Germany) for his help by handling the great diversity of the collected Peruvian mites.

Remarks. Aeroppia friedrichi sp. nov. is morphologically most similar to Aeroppia nasalis Mahunka, 1984 from the Neotropical region (see Mahunka, 1984) in having well-developed prodorsal setae, long dorsal notogastral setae, and in location of lamellar setae (close to each other). However, the new species differs from the latter by the absence of striate ornamentation on the notogaster (vs. present) and notogastral setae h 1 (vs. present), and the presence of setiform adanal setae ad 1 (vs. dilated in median parts).

Also, the new species is morphologically similar to Aeroppia sp4. from the Neotropical region (see Hammer 1962; Subías et al. 2004),but, differs by the smaller body length (614–647 vs. 920), thickness of notogastral setae p 1 (not thicker than dorsal notogastral setae vs. thicker) and short notogastral setae p 2 and p 3 (vs. of medium size).

Figures

FIGURES 1 – 2. Aeroppia friedrichi sp. nov., adult: 1 — dorsal view (gnathosoma and legs not shown); 2 — ventral view (gnathosoma and legs not shown). Scale bar 100 µm.

FIGURES 3 – 6. Aeroppia friedrichi sp. nov., adult: 3 — lateral view (gnathosoma and legs not shown); 4 — subcapitulum, ventral view; 5 — palp, except trochanter, left, paraxial view; 6 — chelicera, right, antiaxial view. Scale bars 100 µm (3), 50 µm (4 – 6).

FIGURES 7 – 8. Aeroppia friedrichi sp. nov., adult: 7 — leg I, except trochanter, right, antiaxial view; 8 — leg II, right, antiaxial view. Scale bar 100 µm.

FIGURES 9 – 10. Aeroppia friedrichi sp. nov., adult: 9 — leg III, left, antiaxial view; 10 — leg IV, left, antiaxial view. Scale bar 100 µm.

Tables

TABLE 1. Leg setation and solenidia of adult Aeroppia friedrichi sp. nov., A. longisensilla sp. nov., A. consimilis (Banks, 1910) and A. magnipilosa (Ewing, 1909) (* — setae l' on trochanters III absent in A. magnipilosa).

Leg	Tr	Fe	Ge	Ti	Ta
I	v'	d, (l), bv'', v''	(l), σ	(l), (v), φ1, φ2	(ft), (tc), (it), (p), (u), (a), s, (pv), v', (pl), l'', ɛ, ω1, ω2
II	v'	d, (l), bv'', v''	(l), σ	(l), (v), φ	(ft), (tc), (it), (p), (u), (a), s, (pv), l'', ω1, ω2
III	l'*, v'	d, l', ev'	l', σ	l', (v), φ	(ft), (tc), (it), (p), (u), (a), s, (pv)
IV	v'	d, ev'	d, l'	l', (v), φ	ft'', (tc), (p), (u), (a), s, (pv)