Carabodes ( Klapperiches ) paradilatatus Ermilov, 2025

ErmilovK, Sergey G. & RybalovK, Leonid B., 2025, New faunistic data on oribatid mites (Acari, Oribatida) from western, southern and southeastern Ethiopia, with description of two new species of the family Carabodidae, Acarologia 65 (2), pp. 559-574 : 565-569

Carabodes ( Klapperiches) paradilatatus Ermilov n. sp.

Zoobank: 1FEEB9AE-E513-459C-9B27-D2CFB0F9C746

( Figures 2 , 3 )

Type material — Holotype (female) and three paratypes ( three females): Southern Ethiopia, South Ethiopia Regional State, Gamo Zone, 6°01′36.7″N, 37°35′42.7″E, 1170 m a.s.l., 5 km

East from the town Arba Minch, 1 km from the lake Abai, litter in a mixed forest on the terrace (first layer of forest: Celtis sp. , Ficus sycomorus , Schefflera sp. , Acacia sp. ; second layer of forest: Lemon sp. , Coffea arabica ) on brown (black-brown) soil with light-medium loam soil texture, 7.XII.2018, dry season (L.B. Rybalov). Two paratypes ( two females): same as the holotype, but mineral soil ( 0–5 cm).

The holotype is deposited in the collection of the Senckenberg Museum of Natural History, Görlitz, Germany ; five paratypes are in the collection of the University of Tyumen, Museum of Zoology, Tyumen, Russia. All specimens are preserved in 70% solution of ethanol with a drop of glycerol.

Diagnosis — Body length: 300–345. Prodorsum between lamellae with unevenly spaced tubercles, frequently fused and forming short tuberculate ridges. Lamella triangular distally; translamella absent. Rostral and lamellar setae short, setiform, slightly barbed; interlamellar seta comparatively short, phylliform, dilated mediodistally, barbed; bothridial seta long, fusiform, with barbed head. Notogaster with unevenly spaced tubercles (dorsocentral part with some areas without tubercles). All notogastral setae comparatively short (posterior setae shorter than others), phylliform, dilated mediodistally, barbed. Subcapitular mentum and epimeral region without sculpture; epimere I with one pair of setae; all epimeral setae short, simple. Anogenital region with slightly developed unevenly spaced tuberculate ridges, simple ridges and some small depressions. Genital, aggenital and anal setae short, simple; all adanal setae short, slightly dilated and barbed mediodistally. Leg tarsus IV with 12 setae.

Description — Measurements. Body length: 345 ( holotype), 300–345 (female paratypes); notogaster width: 180 ( holotype), 165–180 (female paratypes). Body ratio (length/width): ≈ 1.8–1.9.

Integument ( Figs 2 (a–e), 3(e, d)) — Body color light brown. Body covered by thin layer of gel-like cerotegument. Prodorsum between lamellae with unevenly spaced tubercles (diameter up to 7), frequently fused and forming short tuberculate ridges; lateral part of prodorsum partially with foveolae (diameter up to 5); notogaster with unevenly spaced tubercles (diameter up to 7; dorsocentral part with some areas without tubercles); anogenital region with slightly developed unevenly spaced tuberculate ridges, simple ridges and some depressions; subcapitular mentum, epimeral region, genital and anal plates without sculpture; antiaxial side of leg femora

I, II partially with large, poorly developed foveolae.

Prodorsum ( Figs 2 (a, b, d)) — Rostrum broadly rounded. Lamella long and broad, triangular distally; translamella absent; tutorium short, ridge-like; lateral part of prodorsum with slight ridge lpr () directed to end of lamella and bearing indistinct teeth. Rostral (13–

15) and lamellar (17–19) setae setiform, slightly barbed; ro inserted dorsally on rostrum; le inserted dorsomedially in distal part of lamella; interlamellar seta (26–30) phylliform, dilated mediodistally, barbed; bothridial seta (45–55) fusiform, with long, roughened stalk and short, barbed head; exobothridial seta not observed. Bothridium interrupted ventrally.

Notogaster ( Figs 2 (a, d, e)) — Anterior notogastral margin slightly convex medially. Humeral shoulder small, visible in dorsolateral and lateral aspects. Ten pairs of notogastral setae ( p 1, p 2, p 3, h 3: 13–15; others: 22–30) phylliform, dilated mediodistally, barbed. Opisthonotal gland opening and lyrifissures ia, im visible; lyrifissures ip, ih and ips not observed.

Gnathosoma ( Figs 3 (a–c)) — Subcapitulum size: 75–77 × 60–64; subcapitular seta a (11) setiform, roughened; m (9–11) and h (7) setiform, nearly smooth. Palp length: 37; setation: 0-2-1-2-7(+ω); setae acm and v′ on tarsus and l″ on tibia absent; postpalpal seta (4) spiniform, smooth. Chelicera length: 82–86; seta cha (22–26) setiform, barbed; seta chb (11–13) setiform, roughened.

Epimeral and lateral podosomal regions ( Figs 2 (c, d)) — Epimeral setation: 1-1-3-3; all setae (7) setiform, nearly smooth. Discidium tubercle-like.

Anogenital region ( Figs 2 (c–e)) — Anogenital formula: 4-1-2-3; genital (7), aggenital (11)

and anal (11) setae setiform, nearly smooth; all adanal setae (11) slightly dilated and barbed mediodistally. Adanal lyrifissure not observed.

Legs ( Figs 3 (d–g)) — Claw of each leg strong, slightly roughened dorsally, with ventrobasal indistinct microtubercle. Dorsoparaxial porose area on femora I–IV elongate oval. Formulas of leg setation and solenidia: I (1-4-3-4-16) [1-2-2], II (1-4-3-2-15) [1-1-2], III (2-3-1-2-15)

[1-1-0], IV (1-2-2-2-12) [0-1-0]; homology of setae and solenidia indicated in Table 1 ; seta

s of tarsus I spiniform; phylliform seta absent on segments; solenidion φ 1 of tibia I long, subflagellate versus other solenidia medium-sized or short, thickened, rounded distally.

Remarks — Carabodes ( Klapperiches) paradilatatus Ermilov n. sp. is most similar to

C. ( K.) dilatatus Ermilov, Sidorchuk and Rybalov, 2010 from Ethiopia in having tuberculate notogaster and dorsal part of prodorsum, long bothridial seta with well-developed head, and short, phylliform interlamellar and notogastral setae. However, the new species differs from the latter by smaller body size (length: 300–345 versus 365–464), the morphology of lamellar, bothridial and adanal setae le (setiform; bs fusiform, with barbed head; ad 1 – ad 3 dilated mediodistally versus le dilated in median part; bs clavate, nearly smooth; ad 1 – ad 3 setiform),

the density of arrangement of the tubercles in dorsocentral part of the notogaster (unevenly spaced, with some comparatively large areas without tubercles versus evenly and densely spaced, without large free areas between tubercles), and the absence (versus presence) of foveolae on the subcapitular mentum.

Etymology — The species name paradilatatus refers to the similarity of C. ( K.) paradilatatus to C. ( K.) dilatatus.

Figures

Figure 2 Carabodes(Klapperiches) paradilatatusErmilov n. sp., adult: a–dorsal view; b–anterior part of prodorsum, anterior view; c– ventral view (gnathosoma and legs omitted); –dright lateral view (legs omitted); – eposterior view (part of left half omitted). Scale bar 50 μm.

Figure 3 Carabodes(Klapperiches) paradilatatusErmilov n. sp., adult: a–subcapitulum, ventral view; b –palp, left, paraxial view; c – chelicera, left, paraxial view; d–leg I, right, antiaxial view; e –leg II (tarsus omitted), right, antiaxial view; f –leg III (tarsus omitted), left, antiaxial view; g–leg IV, left, antiaxial view. Scale bars 20 μm (a, c –g), 10 μm (b).