Scheloribates (Bischeloribates) eduardoi, Ermilov & Subías & Shtanchaeva & Friedrich, 2021

Ermilov, Sergey G., Subías, Luis S., Shtanchaeva, Umukusum Ya. & Friedrich, Stefan, 2021, New sacculonotic Oripodoidea (Acari: Oribatida) from Peru, Zootaxa 5048 (3), pp. 422-434 : 423-426

Scheloribates (Bischeloribates) eduardoi sp. nov.

( Figs 1 , 2 )

Diagnosis. Body size: 265–282 × 166–182. Rostrum pointed. Prolamella short, represented only by basal part. Translamella present, interrupted medially. Rostral, lamellar and interlamellar setae long, setiform, barbed; ro shortest. Bothridial seta long, clavate, barbed. Notogaster with one pair of short, setiform, smooth setae (p 1) and nine pairs of alveoli. Epimeral and anogenital setae short, setiform, roughened. Circumpedal carina of medium length. Leg tarsus I with 19 setae (l” absent); genu II with two setae (v’ absent).

Description of adult. Measurements. Body length: 273 (holotype: female), 265–282 (three paratypes: all females); body width: 173 (holotype), 166–182 (three paratypes).

Integument. Body color light brown. Cuticle microporose (visible under high magnification, ×1000). Lateral side of body with microgranulate cerotegument between bothridium and acetabula I–III.

Prodorsum ( Figs 1A, C ). Rostrum pointed. Lamella about 1/2 length of prodorsum. Prolamella short, represented only by basal part. Sublamella linear, similar to lamella in length. Sublamellar porose area (4–6) rounded. Translamella present, shortly interrupted medially. Lateral keel-shaped ridge distinct. Rostral (41–45), lamellar (57–61) and interlamellar (61–65) setae setiform, barbed. Exobothridial seta not observed. Bothridial seta (41–45) clavate, barbed. Dorsosejugal porose area not observed.

Notogaster ( Figs 1A, C ). One pair of setiform, smooth notogastral setae (p 1: 10–12) developed; other setae represented by alveoli. Four pairs of small sacculi. Opisthonotal gland opening and all lyrifissures distinct.

Gnathosoma ( Figs 2A–D ). Subcapitulum longer than wide (69–77 × 53–57). All subcapitular (a: 14–16; m: 10–12; h: 18–20) and adoral (10–12) setae setiform, barbed; m thinner than a and h. Palp (45–49) with typical setation: 0-2-1-3-9 (+ω). Postpalpal seta (6) spiniform, roughened. Chelicera (77–82) with two setiform, barbed setae (cha: 24–26; chb: 16).

Epimeral and lateral podosomal regions ( Figs 1B, C ). Epimeral setal formula: 3-1-3-3. All setae (1b, 3b, 3c, 4c: 18–20; others: 10–12) setiform, roughened. Pedotectum II with small posterolateral tooth. Discidium triangular, rounded apically. Circumpedal carina of medium length, directed to pedotectum II but not reaching it.

Anogenital region ( Figs 1B, C ). Genital (g 1: 12; others: 8–10), aggenital (12), anal (8–10), and adanal (12) setae setiform, roughened. Adanal lyrifissure distinct. Marginal porose area band-like, complete.

Legs ( Figs 2E–H ). Bidactylous; all claws slightly barbed on dorsal side; paraxial claw (on tarsi I, II) and antiaxial claw (on tarsi III, IV) thinner than the accompanying claw, with small tooth distoventrally. Tibiae I and II with tubercle proximoventrally. Femur II with broadly rounded ledge distoventrally. Dorsoparaxial porose area on femora I-IV and on trochanters III, IV well visible; proximoventral porose area on tarsi I-IV and distoventral porose area on tibiae I-IV not observed. Formulas of leg setation and solenidia: I (1-5-3-4-19) [1-2-2], II (1-5-2-4-15) [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 of tarsus I short, erect, slightly swollen distally, inserted between solenidion ω 2 and seta ft”. Solenidion ω 1 on tarsi I, ω 1 and ω 2 on tarsus II and σ on genu III bacilliform, other solenidia setiform. Seta s on tarsus I setiform, barbed (not eupathidial), inserted behind setae a’ and a”.

Note: Roman letters refer to normal setae, Greek letters to solenidia (except ɛ = famulus), Single quote (’) marks seta on anterior and double quote () seta on posterior side of the given leg segment. Parentheses refer to a pair of setae. * – Seta v’ on genu I present and l” on femur II absent in P. elisabethae (versus v’ on genu I absent and l” on femur II present S. (B.) eduardoi and S. (H.) dianae ).

Type deposition. The holotype is deposited in the collection of the MUSM ; three paratypes are deposited in the collection of the TSUMZ. All specimens are preserved in 70% solution of ethanol with a drop of glycerol.

Etymology. The specific name eduardoi is given in honour of our friend and colleague Dr. Eduardo Ruiz (Complutense University, Madrid, Spain).

Remarks. Distinctive characters of the new species compared with other recent members of the genus can be found in the identification key below.

Figures

FIGURE 1. Scheloribates (Bischeloribates) eduardoi sp. nov., adult: A—dorsal view; B—ventral view (gnathosoma and legs omitted); C—lateral view (gnathosoma and legs omitted). Scale bar 50 μm.

FIGURE 2. Scheloribates (Bischeloribates) eduardoi sp. nov., adult: A—subcapitulum, ventral view; B—right lip with adoral setae, ventral view; C—palp, right, antiaxial view; D—chelicera, right, antiaxial view; E—leg I, right, antiaxial view; F—leg II (tarsus omitted), right, antiaxial view; G—leg III (tarsus omitted), left, antiaxial view; H—leg IV, left, antiaxial view. Scale bars 20 μm (A, B, D–H), 10 μm (C).