Ampullobates ecuadoriensis, Ermilov & Sandmann & Marian & Maraun, 2013

Ermilov, S. G., Sandmann, D., Marian, F. & Maraun, M., 2013, THREE NEW SPECIES OF ORIBATID MITES (ACARI, ORIBATIDA) FROM ECUADOR Sergey G. E, Dorothee S, Franca M and Mark M, Acarologia 53 (1), pp. 111-123 : 112-115

Ampullobates ecuadoriensis n. sp.

( Figures 1-2 )

Diagnosis — Body size 664 – 713 x 431 – 481. Surface of prodorsum microtuberculate. Surface of notogaster and anogenital region foveolate. Interlamellar and exobothridial setae well developed. Sensilli long, with poorly developed, lanceolate head. Exuvial centrodorsal setae simple, thick. Notogastral setae h 1, h 2 and p 1 dilated distally, and p 2 and p 3 simple. Epimeral setae 1a, 2a and 3a bifurcate. One pair of genital setae inserted separately from others.

Measurements — Body length 697 (holotype), 664 – 713 (mean 693; four paratypes); notogaster width 448 (holotype), 431 – 481 (mean 452; four paratypes).

Integument — ( Figures 1A , 2I ). Body color yellowish to brown. Surface of prodorsum and ventral side microtuberculate (diameter of tubercles up to 2). Surface of notogaster, anogenital region, genital and anal plates foveolate (diameter of foveolae up to 12).

Prodorsum — ( Figures 1A, C, D ; 2A ). Rostrum widely rounded in dorsal view. Rostral (ro, 98 – 102) and lamellar (le, 123 – 127) setae setiform, smooth. Interlamellar (in, 57 – 65) and exobothridial (ex, 41 – 45) setae setiform, slightly barbed. Sensilli (ss, 143 – 147) thickened, with poorly developed, lanceolate, barbed head. Pedotecta I (Pt I) and II (Pt II) developed typically for genus.

Notogaster — ( Figures 1A, C ; 2 B-D). Anterior margin convex. Notogaster covered by the thin exuvium, having three pairs of centrodorsal setae (d 1 E, 65 – 73; e 1 E, 49 – 53; f 1 E, 36 – 41) and six pairs of setal alveoli. Exuvial setae simple, thick, straight, densely barbed. Notogastral setae c 1, c 2, cp, d 1, d 2, e 1, e 2, f 1 and f 2 reduced. Only six pairs of notogastral setae well developed: p 1, h 1 and h 2 (32 – 41) dilated distally, slightly serrate; p 2 and p 3 (28 – 32) thickened, setiform, straight, slightly barbed; c 3 (16) setiform, thin, smooth. Lyrifissures and opisthonotal gland openings (gla) located typically for the family.

Gnathosoma — ( Figures 2 E-G). Typical for Hermanniellidae ( Grandjean 1962b; Ermilov and Kaloez 2012a). Subcapitulum longer than wide: 164 – 172 x 123. Subcapitular setae setiform, straight, smooth; m (53 – 57) longer than h (41 – 45) and a (32 – 36). Adoral setae or 1 (20 – 24) fusiform, smooth; adoral setae or 2 (24 – 28) thickened, densely barbed. Palps (length 94) with setation 0-2-1-3-6(+1ω). Solenidion not attached with eupathidium (acm). Chelicerae (length 164) with two setiform, barbed setae: cha (82) longer, than chb (36). Trägårdh’s organ not evident.

Epimeral region — ( Figures 1B ; 2H ). Epimeral setal formula: 3-1-2-3. Setae slightly barbed: 1a, 2a, 3a (all 32 – 36) bifurcate; others (all 41 – 45) setiform, straight. Discidia (dis) blunt-ended distally.

Anogenital region — ( Figures 1B ; 2I ). Seven pairs of genital setae (anterior pair 32 – 36; others 16 – 20) setiform, smooth inserted in two parallel rows; seventh pair longest (41 – 45), inserted separately from others. One pair of aggenital (ag) and two pairs of anal setae similar in length (an 1, an 2, 36 – 41), setiform, smooth. Three pairs of adanal setae (ad 1, 45 – 49, ad 2, ad 3, 36 – 41) setiform, slightly barbed. Lyrifissures iad in inverse apoanal position, located laterally to adanal setae ad 3.

Legs — ( Figure 2J ). Typical for Hermanniellidae ( Grandjean 1962a; Ermilov and Kaloez 2012a). Claw of each tarsus smooth. Homology of setae and solenidia is indicated in Table 1. Famulus (e) and solenidia setiform.

Material examined — Holotype (male) and four paratypes (two males, two females): Southern Ecuador, 3°58’ S, 79°50’ W, Estation Scientifica San Francisco, 2000 m. a.s.l., upper organic soil layer in mostly undisturbed rain forest, 01.04.2008, collected by F. Marian and D. Sandmann.

Type deposition — The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia ; two paratypes are deposited in the collection of the Siberian Zoological Museum , Novosibirsk, Russia ; two paratypes are in the personal collection of the first author.

Etymology — The specific name " ecuadoriensis " refers to the country of origin, Ecuador.

Remarks — Ampullobates ecuadoriensis n. sp. can be distinguished from the type species Ampullobates nigriclavatus Grandjean, 1962 (see Grandjean 1962b) by the setiform, bent lamellar setae (versus thickened, straight in A. nigriclavatus ), longer interlamellar and exobothridial setae (versus minute in A. nigriclavatus ), poorly developed, lanceolate sensillar head (versus well developed, rounded distally in A. nigriclavatus ), thick, not dilated centrodorsal setae (versus clearly dilated in A. nigriclavatus ), bifurcate epimeral setae 1a, 2a, 3a (versus setiform in A. nigriclavatus ), and the position of one pair genital seta separated from the other six pairs (versus all genital setae inserted in two rows in A. nigriclavatus ).

Figures

FIGURE 1: Ampullobates ecuadoriensis n. sp.: A – dorsal view; B – ventral view, legs, subcapitular setae and palps not shown; C – lateral view of prodorsum, legs and gnathosoma not shown; D – sensillus. Scale bar (A, B) 200 µm, scale bar (C) 100 µm, scale bar (D) 20 µm.

FIGURE 2: Ampullobates ecuadoriensis n. sp.: A – interlamellar seta; B – exuvial seta d1E; C – notogastral seta h1; D – notogastral seta p2; E – subcapitulum, left half; F – palptarsus; G – anterior part of chelicera; H – epimeral seta 3a; I – genital plate, left; J – leg tarsus I, left, antiaxial view. Scale bar (A+D, G, I) 20 µm, scale bar (E, J) 50 µm, scale bar (F, H) 10 µm.