Protoribates ecuadoriensis, Ermilov, Sergey G., Bayartogtokh, Badamdorj, Sandmann, Dorothee, Marian, Franca & Maraun, Mark, 2013

Ermilov, Sergey G., Bayartogtokh, Badamdorj, Sandmann, Dorothee, Marian, Franca & Maraun, Mark, 2013, New and little known species of oribatid mites of the family Haplozetidae (Acari, Oribatida) from Ecuador, ZooKeys 346, pp. 43-57 : 48-51

Protoribates ecuadoriensis sp. n. Figs 3, 4

Diagnosis.

Body size 547-647 × 332-431. Prodorsal setae long, setiform, barbed. Exobothridial setae minute. Sensilli with long stalk, lanceolate head and thin, point tip; distal part of stalk and sensillar head ciliate. Sublamellar porose areas large, oval. Notogastral porose areas of medium size, oval. Notogastral setae short. Adanal setae ad1 longer than ad2, ad2 longer than ad3.Legs monodactylous. Leg tarsi I, II with large dorsal tubercles. Tarsi I with 20 setae.

Description.

Measurements. Body length: 630 (holotype), 547-647 (five paratypes); notogaster width: 415 (holotype), 332-431 (five paratypes).

Integument. Body color light brownish to brown. Body surface microgranulate (visible only under high magnification).

Prodorsum. Rostrum rounded. Lamellae located dorso-laterally, not longer than half of prodorsum, hardly reaching insertions of lamellar setae. Rostral (49-57), lamellar (86-94) and interlamellar setae (123-135) setiform, barbed. A pair of elongate, narrow porose areas Ad present latero-posterior to interlamellar setae (visible under high magnification in dissected specimen). Exobothridial setae minute (4), thin, smooth. Sensilli (102-108) with long stalk, lanceolate head and thin, pointed tip; distal part of stalk and sensillar head ciliate. Tutoria short, narrow, slightly arched distally. Sublamellar lines short, very thin, straight, poorly visible. Sublamellar porose areas large, oval (20 × 16). Porose areas Am and Ah not observed.

Notogaster. Anterior notogastral margin convex medially. Dorsophragmata and pleurophragmata distinct. Pteromorphs sub-triangular. Ten pairs of notogastral setae short (4-6), thin, smooth. Four pairs of porose areas of medium size, oval: Aa (16-20 × 12-16) slightly larger than A1, A2 and A3 (10-14 × 8-12). Setae lp inserted posteriorly to A1. Lyrifissures (ia, im, ip, ih, ips) and opisthonotal gland openings located typically for the genus (see Weigmann et al. 1993; Miko et al. 1994). Postanal porose area absent.

Gnathosoma. Subcapitulum longer than wide (147-164 × 102-110). Subcapitular setae setiform, barbed; h and a (both 24-28) longer than m (10-14). Two pairs of adoral setae (16-20) setiform, barbed. Palps (90) with setation 0 –2–1–3– 9(+ω). Solenidion thickened, coupled with eupathidium. Chelicerae (147-164) with two setiform, barbed setae; cha (41-45) longer and thicker than chb (24-28). Trägårdh’s organ conical.

Epimeral and lateral podosomal regions. Apodemes 1, 2, 3 and sejugals well developed. Epimeral setal formula 3 –1–3– 3; setae setiform, slightly barbed. Medial setae 1a, 2a, 3a (12-14) shorter than others (20-24). Pedotecta I, II, discidia and circumpedal carinae developed typically for the genus (see Weigmann et al. 1993; Miko et al. 1994). Custodia indistinct, widely blunt.

Anogenital region. Five pairs of genital (g1, 18-24, g2-g5, 12-16), one pair of aggenital (12), two pairs of anal (12) and three pairs of adanal (ad1, 22-24, ad2, 14-16, ad3, 12) setae setiform, slightly barbed. Lyrifissures iad in paraanal position.

Legs. All tarsi monodactylous. Morphology of leg segments, setae and solenidia typical for genus (see Weigmann et al. 1993; Miko et al. 1994), but tarsi I, II with large dorsal tubercles (t). Formulae of leg setation and solenidia: I (1 –5–3–4– 20) [1 –2– 2], II (1 –5–3–4– 15) [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 2.

Material examined.

Holotype (female) and five paratypes (two females and three males): Ec-1.

Type deposition.

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

Etymology.

The specific name “ecuadoriensis” refers to the country of origin, Ecuador.

Remarks.

In having the combination of main morphological characters (monodactylous legs; body of medium size; prodorsal setae long, simple, barbed; sensilli long, with lanceolate, ciliate head; four pairs of porose areas oval; adanal setae ad1 longer than ad2, ad2 longer than ad3), Protoribates ecuadoriensis sp. n. is most similar to Protoribates oblongus (Ewing, 1909) from the Nearctic region (see Ewing 1909; Jacot 1937), however, the new species clearly differs from the latter by the presence of large tubercles on dorsal side of leg tarsi I and II.