Lagenobates fossatus Ermilov and Kontschán, 2023

ErmilovK, Sergey G., KontschánK, Jenő, Kolesnikov K, Vasiliy B., KlimovK, Pavel B. & SharapovK, Denis V., 2023, Faunistic and taxonomic additions to the oribatid mites (Acari, Oribatida) of Cuba, Acarologia 63 (3), pp. 770-782 : 775-778

Lagenobates fossatus Ermilov and Kontschán n. sp.

Zoobank: 4E7C8F98-6F94-4702-AB9E-F9DE2C77357B

( Figures 1 , 2 )

Material — Holotype (female) and three paratypes (three females): Cuba, 22°1′N, 80°7′W, Cienfuegos Province, Sierra del Escambray, El Nicho, leaf litter in mixed forest. The holotype is deposited in the collection of the Senckenberg Museum of Natural History, Görlitz , Germany ; three paratypes are deposited in the collection of the Tyumen State University Museum of Zoology , Tyumen, Russia ; all specimens are preserved in 70% solution of ethanol with a drop of glycerol.

Diagnosis — Body length: 270. Rostrum slightly protruding, narrowly rounded. Rostral, lamellar and interlamellar setae long, setiform, barbed; ro inserted on distinct tubercle; bothridial seta clavate, barbed. Notogastral setae short, setiform, smooth. Four pairs of rounded notogastral porose areas. Epimeral and anogenital setae short, setiform, smooth. Ventral plate with two thin, longitudinal furrows extend from the sternal epimeral region to the anal aperture. Leg tarsus I with 18 setae (pl′ and l″ absent); genu IV with one seta d ().

Description of adult — Measurements – Body length: 270 (holotype: female), 270 (three paratypes: all females); body width: 150 (holotype), 135–150 (paratypes).

Integument – Body color light brown, partially covered by thin layer of gel-like cerotegument. Body surface smooth.

Prodorsum – Rostrum slightly protruding, narrowly rounded. Lamella about 1/2 length of prodorsum; translamella, prolamella and tutorium absent; sublamella linear, well visible. Sublamellar porose area (4–6) rounded. Rostral (26–30), lamellar (43–47) and interlamellar (37–41) setae setiform, barbed; ro inserted dorsally on distinct tubercle; le inserted on the lamellar end; exobothridial seta (9) setiform, thin, smooth; bothridial seta (37–45) clavate, barbed; length of bothridial stalk approximately equal to head. Dorsosejugal porose area not observed.

Notogaster – Anterior notogastral margin convex medially. Pteromorph broadly rounded laterally. All setae (c: 13–17; others: 9) setiform, thin, smooth. All porose areas (Aa: 6–8; A1, A2, A3: 2–4) rounded. Lyrifissures im and ip distinct, ia poorly visible, ih and ips not observed.

Gnathosoma – Subcapitulum size: 60–62 × 41–45; subcapitular (a, m: 11–13; h: 13–15)

and adoral (6) setae setiform, roughened. Palp length: 37–41; postpalpal seta (4) spiniform, smooth. Chelicera length: 60–62; setae cha (: 19–22; chb: 11–13) setiform, barbed.

Epimeral and lateral podosomal regions – Epimeral formula: 3–1–3–3; setae (1b, 3c: 11;

1c: 6–7; others: 7–9) setiform, smooth. Custodium, discidium and circumpedal carina well developed.

Anogenital region – Two thin, longitudinal furrows extend from the sternal epimeral region to the anal aperture. Genital (4–6), aggenital (6–7), anal (9–11), and adanal (9–11) setae setiform, thin, smooth. Adanal lyrifissure distinct. Marginal porose area not observed.

Legs – Claw of all tarsi strong, slightly barbed on dorsal side. Dorsoparaxial porose area on femora I–IV and on trochanters III, IV present; ventrodistal porose area on tibia I–IV and proximoventral porose area on tarsi I–IV not observed. Formulas of leg setation and solenidia: I (1–5–3–4–18) [1–2–2], II (1–5–2–4–15) [1–1–2], III (2–3–1–3–15) [1–1–0], IV (1–2–1–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 1 ; famulus of tarsus I short, erect, slightly swollen distally, inserted posterior to solenidion 2 ω; solenidia ω 1 on tarsus I, ω 1 and ω 2

on tarsus II and σ on genu III bacilliform, other solenidia setiform.

Remarks — Lagenobates fossatus Ermilov and Kontschán n. sp. differs from the single representative of the genus— Lagenobates lagenula ( Berlese, 1905) — in the morphology of the bothridial seta (clavate, barbed versus fusiform, smooth) and in the presence (versus absence) of two longitudinal furrows in the anogenital region.

Etymology — The specific epithet fossatus is from Latin fossa (“furrow” or “groove”) and refers to two furrows on the ventral plate.

Figures

Figure 1 Lagenobates fossatusErmilov and Kontschánn. sp., adult: a – dorsal view (legs omitted); b – ventral view (gnathosoma and legs omitted); c – right lateral view (gnathosoma and legs omitted). Scale bar 50 μm.

Figure 2 Lagenobates fossatusErmilov and Kontschánn. sp., adult: a – posterior view; b – subcapitulum, ventral view; c – palp, left, paraxial view; d – chelicera, left, paraxial 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 50 μm (a), 20 μm (b, d–h), 10 μm (c).