Ceratobates pachiteaensis, Ermilov & Subías & Shtanchaeva & Friedrich, 2022

Ermilov, Sergey G., Subías, Luis S., Shtanchaeva, Umukusum Ya. & Friedrich, Stefan, 2022, A New Species Of Ceratobates (Acari, Oribatida) From Peru And A Key To Known Species Of The Genus, Acta Zoologica Academiae Scientiarum Hungaricae 68 (3), pp. 231-238 : 233-236

Ceratobates pachiteaensis sp. n.

( Figs 1 , 2 )

Diagnosis. Body length: 365–381. Rostrum bidentate. Lamellar cusp with long lateral tooth. Rostral seta setiform, barbed; lamellar and interlamellar setae thick, barbed; ro shortest, in longest. Bothridial seta long, clavate, slightly barbed; head elongate oval. All notogastral setae setiform, slightly barbed. Epimeres III, IV with two and three pairs of setae, respectively; 1c of medium length, thickened, barbed; other setae and anogenital setae short, setiform, slightly barbed. Leg tarsi with one (in typical case) or three claws.

Description of adult. Measurements. Body length: 381 (holotype, female), 365–381 (four paratypes, two males and two females); notogaster width: 265 (holotype), 249–265 (four paratypes). No difference between males and females in size (in studied population).

Integument. Natural body color brown. Surface of body microsculpturing microgran- ulate; epimeral region, genital plate and subcapitular mentum hardly striate; antiaxial side of leg femora I-IV and trochanters III, IV with rounded end elongate tubercles. Podosomal part of body partially with granulate cerotegument.

Prodorsum. Rostrum bidentate, with two strong teeth and semi-rectangular incision between them. Lamella (without cusp) shorter than half of prodorsum; lamellar cusp short, with long (longer than distance between insertions of lamellar setae), thin lateral tooth. Rostral seta (65–73) setiform, barbed, mediodistally directed anteromediad. Lamellar (77– 82) and interlamellar (102–110) thick, barbed. Bothridial seta (61–69) clavate, with longer stalk and shorter, elongate, slightly barbed head. Exobothridial seta not observed. Tutorial tip and genal tooth narrowly triangular. Dorsosejugal porose area not observed.

Notogaster. Pteromorph forming slight right angle laterally (visible in lateral aspect). All notogastral setae (c, la, lm, h 3: 28–32; lp, h 2: 20–24; h 1, p 1 – p 3: 14–16) setiform, slightly barbed. Notogastral lyrifissure ip not observed; ia, im, ih, and ips visible. Opisthonotal gland opening distinct.

Gnathosoma . Subcapitulum size: 82–90 × 61–65. All subcapitular setae (a: 14–16; m, h: 20–24) setiform, slightly barbed. Adoral seta (6) setiform, roughened. Palp (length: 61–65) setation: 0-2-1-3-9(+ω). Postpalpal seta (4) spiniform, smooth. Axillary saccule not observed. Chelicera (length: 82–90) with two setiform, barbed setae (cha: 28–32; chb: 18–20).

Epimeral and lateral podosomal regions. Epimeral setal formula: 3–1–2–3. Seta 1c (32) thickened, barbed; other setae (1a, 2a, 3a: 12; 1b, 3b, 4a, 4b, 4c: 16) setiform, slightly barbed. Custodium, discidium and circumpedal carina well developed. Humeral porose area Ah poorly visible, oval; Am absent.

Anogenital region. Genital (g 1: 16–20; g 2 – g 6: 16), aggenital (16), anal (16), and adanal (12) setae setiform, slightly barbed. Adanal lyrifissure located close and parallel to anal plate. Postanal porose area oval (10–12 × 4).

Legs. Holotype and three paratypes monodactylous; one paratype heterotridactylous. All claws slightly barbed dorsally. Paraxial porose area on femora I-IV and on trochanters III, IV distinct. Genua I, II with ventral tooth. 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]; homologies of setae and solenidia indicated in Table 1. Famulus of tarsus I short, erect, slightly swollen distally, inserted before solenidion ω 1. Seta s of tarsus I eupathidial, located anterior to setae a. Tibia II and genua I, II with thick lateral (antiaxial) seta. Solenidion φ of tibia IV represented by alveolus.

Material examined. Holotype (female) and three paratypes (two males and one female): South America, Peru, Central Peru, Andes , 09°54’30’’S, 76°03’48’’W, Huánuco De - partment, Pachitea Province , Molino District , W Molino, Monte Potrero , 2850–3100 m a.s.l., upper soil and leaf litter in a primary mountain cloud forest, 15–17.IV.2016 (S. Friedrich, F. Wachtel and D. Hauth). One paratype (one female): South America , Peru, Central Peru, Andes , 10°01’47’’S, 76°08’29’’W, Huánuco Department, Ambo Province , Conchamarca District , Pichcacocha Lakes, 3800 m a.s.l., upper soil and leaf litter in mountain forest, 9.IV.2016 (S. Friedrich, F. Wachtel and D. Hauth). Mites were extracted from samples into 75% ethanol using Winkler’s apparatus.

Type deposition. The holotype is deposited in the collection of the Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Lima, Peru; four paratypes are deposited in the collection of the Tyumen State University Museum of Zoology , Tyumen, Russia . All specimens are preserved in 70% ethanol solution with a drop of glycerol.

Etymology. The species name refers to the place of origin of the holotype, Pachitea

Province.

Remarks. Ceratobates pachiteaensis sp. n. differs from all representatives of the genus by the presence of comparatively long outer tooth of lamellar cusp (longer than distance between insertions of lamellar setae versus shorter than distance between insertions of lamellar setae).

KEY TO KNOWN SPECIES OF CERATOBATES (modified after ERMILOV & ANICHKIN 2015)

Figures

Fig. 1. Ceratobates pachiteaensis sp. n., adult, legs not shown: A = dorsal view; B = ventral view; C = right lateral view; D = posterior view, right half. Scale bar 50 μm

Fig. 2. Ceratobates pachiteaensis sp. n., adult: A = subcapitulum, ventral view; B = palp, right, antiaxial view; C = chelicera, left, paraxial view; D = leg I, right, antiaxial view; E = leg II, without tarsus, right, antiaxial view; F = leg III, without tarsus, left, antiaxial view; G = leg IV, left, antiaxial view. Scale bar 20 μm