Pilobates wachteli, Ermilov & Subias & Shtanchaeva & Friedrich, 2021

Ermilov, Sergey G., Subias, Luis S., Shtanchaeva, Umukusum Ya. & Friedrich, Stefan, 2021, New faunistical and taxonomic data on oribatid mites (Acari: Oribatida) of Ethiopia, with description of two new species of the superfamily Oripodoidea, Acarologia 61 (3), pp. 591-601 : 594-597

publication ID	https://doi.org/ 10.24349/ynmN-vroH
persistent identifier	https://treatment.plazi.org/id/03F1DC59-2632-FFAE-FE21-802C1DCBC820
treatment provided by	Felipe
scientific name	Pilobates wachteli
status	sp. nov.

Treatment

Pilobates wachteli View in CoL n. sp.

Zoobank: F8DAB902-DC32-4263-A4AD-67174C022C3C

( Figures 2 View Figure 2 , 3 View Figure 3 )

Diagnosis — Adult. Body size: 630–713 × 365–431. Body surface densely microgranulate and sparsely foveolate. Rostral, lamellar and interlamellar setae setiform, barbed; ro shortest,

in longest. Bothridial seta long, lanceolate, barbed. Tutorium of medium length. With 15 pairs of setiform, barbed notogastral setae, c 2 comparatively short, others long. Epimeral and anogenital setae setiform, barbed; anal and adanal ad (1, ad 2) setae long, ad 3 of medium length. With six pairs of genital and three pairs of aggenital setae. All leg tarsi with three claws. Trochanter IV without tooth distodorsally.

Description of adult — Measurements – Body length: 630 (holotype: male), 713 (one paratype: female); body width: 365 (holotype), 431 (paratype).

Integument ( Figs 2 View Figure 2 a-c, 3a) – Body color light brown. Body surface densely microgranulate and (except median part of epimeral region) sparsely foveolate (diameter of foveola up to 4).

Prodorsum ( Figs 2a, 2c View Figure 2 ) – Rostrum rounded. Lamella about 1/2 length of prodorsum. Prolamella absent. Sublamella slightly shorter than lamella. Sublamellar porose area oval (20–

24 × 12–16), located ventral to sublamella. Tutorium similar to lamella in length, ridge-like, distinctly not reaching rostral margin. Rostral (73–77), lamellar (131–143), interlamellar (151– 164), and exobothridial (53–57) setae setiform, barbed; ex thinnest. Bothridial seta (123–135) lanceolate, barbed, with long stalk and short head. Dorsosejugal porose area band-like, poorly visible.

Notogaster ( Figs 2a, 2c View Figure 2 ) – Anterior notogastral margin slightly convex medially. Pteromorph subtriangular, rounded laterally, with well-developed hinge. Fifteen pairs of notogastral setae (c 2: 36–41; others: 135–147) setiform, barbed; c 2 thinnest. Four pairs of sacculi drop-like. Opisthonotal gland opening and all lyrifissures distinct.

Gnathosoma ( Figs 3 View Figure 3 a-d) – Subcapitulum size: 147–151 × 98–106. Subcapitular setae setiform, a and h (24–28) barbed, m (20–24) slightly barbed, thinnest. Adoral seta (16–20) setiform, barbed. Palp (61–65) with setation 0–2–1–3–9(+ω). Postpalpal seta (8) spiniform, roughened. Chelicera (159–164) with two setiform, barbed setae cha (: 57–61; chb: 36–41).

Epimeral and lateral podosomal regions ( Figs 2b, 2c View Figure 2 ) – Epimeral setal formula: 3–1–3–3. Setae (1a, 1c, 2a, 3a: 20–24; 3c: 49–53; others: 36–41) setiform, barbed. Circumpedal carina long, directed to pedotectum II. Discidium subtriangular.

Anogenital region ( Figs 2b, 2c View Figure 2 ) – Six pairs of genital (20–24), three pairs of aggenital (20–24), two pairs of anal (73–82), and three pairs of adanal (ad 1, ad 2: 114–121; ad 3: 45–53) setae setiform, barbed. Adanal lyrifissure located close and parallel to anal plate. Marginal porose area complete, band-like.

Legs ( Figs 3 View Figure 3 e-h) – Tridactylous. Median claw distinctly thicker than lateral claws, all slightly barbed on dorsal side. Tibia I with small dorsodistal apophysis bearing solenidiaandφ 1

φ 2. Tibiae I and II with triangular tubercle proximoventrally. All femora rounded distoventrally. Trochanter IV rounded distodorsally (without tooth). Dorsoparaxial porose area on femora I–IV and on trochanters III, IV well visible; proximoventral porose area on tarsi I–IV and view; d – chelicera, right, antiaxial view; e – leg I, without trochanter, right, antiaxial view; f – leg II, without trochanter and tarsus, right, antiaxial view; g – leg III, without tarsus, left, antiaxial view; h – leg IV, left, antiaxial view. Scale bars 20 μm (a, b; c; d; e-h).

distoventral porose area on tibiae I–IV not observed. Formulas of leg setation and solenidia: I (1–5–3–4–18) [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 1. Famulus on tarsus I short, erect, slightly swollen distally, inserted between solenidion 2 ωand seta ft”. Seta s on tarsus

I eupathidial, located before setae a’ and a”. Seta l” on genu I located on small apophysis. Solenidion ω 1 on tarsi I, ω 1 and ω 2 on tarsus II and σ on genu III bacilliform, other solenidia setiform.

Type deposition — The holotype is deposited in the collection of the ZSM ; one paratype is deposited in the collection of the TSUMZ.

Etymology — The specific name is dedicated to our friend and colleague, the coleopterologist and all-around biologist Franz Wachtel (Grünwald, Germany) for his expertise and assistance by collecting the Ethiopian mites.

Remarks — In having tridactylous legs, Pilobates wachteli n. sp. is morphologically most similar to Pilobates incisura (Berlese, 1916) from Somalia (see Berlese 1916b ; Mahunka 1994), however, the new species differs from the latter by the presence of 15 pairs of notogastral setae including c 3 (versus 14 pairs, c 3 absent), very long notogastral (except comparatively short

c 2), anal and adanal ad (1, ad 2) setae (versus all these setae comparatively short), lanceolate bothridial seta (versus setiform), and foveolate body integument (versus not foveolate).