Magyaria leonilae, Ermilov & Sandmann & Scheu, 2019

Ermilov, Sergey G., Sandmann, Dorothee & Scheu, Stefan, 2019, New and interesting species of sacculonotic Haplozetidae (Acari, Oribatida, Haplozetidae) from Indonesia, Zootaxa 4656 (3), pp. 459-474 : 464-468

Magyaria leonilae sp. nov.

( Figs 4–6 )

Material examined. Holotype (male) and eight paratypes (four females and four males): Indonesia, Sumatra, Harapan landscape, secondary tropical rainforest, research site HF1a, 02°09’09.9’’S, 103°21’43.2’’E, litter, November 2013 (B. Klarner).

Type deposition. The holotype is deposited in the collection of LIPI (Indonesian Institute of Science) Cibinong, Indonesia; eight paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia. All in ethanol with a drop of glycerol.

Diagnosis. Body size: 298–365 × 199–249. Prodorsum, notogaster and ventral side of body partially reticulate. Rostrum pointed. Prolamellae and lateral carinae of prodorsum connected distally, forming arch-like structure. Tutoria connected with lateral keel-shaped ridges. Rostral, lamellar and interlamellar setae long, setiform, barbed. Bothridial setae long, clavate, barbed. Notogastral, epimeral, genital and anal setae short, setiform, smooth. Four pairs of genital setae. Leg tarsi with two claws.

Description. Measurements. Body length: 298 (holotype: male), 298–365 (eight paratypes: four females and four males); notogaster width: 199 (holotype), 199–249 (eight paratypes). No differences between females and males in body size.

Integument ( Figs. 4A, 4B , 5A, 5C ). Body color light brown to brown reddish. Body surface (including subcapitular mentum and genae, genital and anal plates, legs) punctate (visible under high magnification, × 1000). Prodorsum, notogaster and ventral side of body partially reticulate. Subcapitular mentum and genae and posterior part of notogaster sparsely foveolate (diameter of foveoles up to 2). Lateral parts of epimere I microtuberculate.

Prodorsum ( Figs 4A, 4C ). Rostrum pointed. Lamellae well-developed, located dorsolaterally, longer than half of prodorsum (measured in lateral view). Lamellar cusps short, truncate or with very small lateral tooth. Sublamellae short, poorly visible. Sublamellar porose areas oval (6–10 × 4–6). Prolamellae and lateral carinae of prodorsum thin, connected, forming arch-like structure. Tutoria long, lineate, connected with lateral keel-shaped ridges. Rostral (32–36) and lamellar (32–36) setae setiform, barbed; ro thinnest, inserted at the tutorial ends, le on the lamellar ends. Interlamellar setae (41–45) setiform, erect, barbed. Exobothridial setae (4) setiform, thin, smooth. Bothridial setae (45–49) clavate, barbed, erect, with long stalk and short head. Dorsosejugal porose areas poorly visible, oval (8 × 2), located posterolateral to interlamellar setae. Dorsophragmata distinctly elongate.

Notogaster ( Figs 4 A–4C, 5B). Anterior notogastral margin convex medially. Incision on anterior part of pteromorphs (behind bothridia) incomplete, developed only on their ventral side, forming distinct groove. Ten pairs of notogastral setae short (4), setiform, thin, smooth. Four pairs of sacculi with small openings and drop-like channels. Distance S1–S1 shorter than S2–S2. All lyrifissures and opisthonotal gland openings distinct. Circumgastric scissure and circumgastric sigillar band well visible.

Gnathosoma ( Figs 5 C–5E). Subcapitulum longer than wide (77–82 × 61–65). Subcapitular setae (a, 16–20; m, 20–28; h, 12–16) setiform, similar in thickness, slightly barbed. Adoral setae (12–16) setiform, heavily barbed. Palps (length 45–49) with setation 0-2-1-3-9(+ω). Solenidion and seta acm of tarsi connected, straight. Postpalpal setae (4) spiniform, smooth. Chelicerae (length 82–86) with two setiform, barbed setae (cha, 22–24; chb, 14–16). Trägårdh’s organ of chelicerae elongate triangular.

Epimeral and lateral podosomal regions ( Figs 4C , 5A ). Epimeral setal formula: 3-1-3-3. Epimeral setae (1b, 3b, 3c, 12–16; 4a, 4b, 8–10; others 4) setiform, thin, smooth. Pedotecta II rounded in ventral view. Discidia pointly triangular. Humeral porose areas Ah present, but poorly visible, elongate oval, Am not observed. Circumpedal carinae long, directed to pedotecta II.

Anogenital region ( Figs 4B, 4C , 5A, 5B ). Four pairs of genital (g 1, 10; others 4), one pair of aggenital (4), two pairs of anal (4) and three pairs of adanal (4) setae setiform, thin, smooth. Adanal lyrifissures located close and lateral to anal aperture. Adanal setae ad 1 and ad 2 lateral, ad 3 anterior to anal aperture. Marginal porose area represented by several rounded parts. Preanal organ goblet-like. Ovipositor elongated (107 × 24), blades (45) shorter than length of distal section (beyond middle fold; 61). Each of the three blades with four smooth setae, ψ 1 ≈ τ 1 (26–28) setiform, ψ 2 ≈ τ a ≈ τ b ≈ τ c (12–14) thorn-like. Coronal setae (8) spiniform.

Legs ( Figs 6 A–6D). All legs bidactylous. Median claw thick, lateral claw (paraxial on tarsi I, II, antiaxial on tarsi III, IV) thin, with small tooth ventrodistally; both barbed on dorsal side. Femora I-IV and trochanters III, IV with distinctly developed dorsoparaxial porose area. Ventroproximal porose area on tarsi and ventrodistal porose area on tibiae poorly visible. Tibiae I, II with slightly developed ventroproximal tubercle. Tibiae II with broadly triangular process ventrodistally. 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 (1-3-1-3-15) [1-1-0], IV (1-2-2-3-12) [0-1-0]; homology of setae and solenidia indicated in Table 1 . Famulus of tarsi I located posterior to solenidion ω 2. Solenidion φ 2 of tibiae I located paraxial to φ 1; dorsodistal apophysis absent. Seta pl’ located laterally on tarsi I.

Etymology. The species name is dedicated to our colleague, the well-known acarologist Dr. Leonila Corpuz- Raros (University of the Philippines Los Baños, Los Baños, Philippines), for her extensive contributions to our knowledge of oribatid mites.

Remarks. Magyaria leonilae sp. nov. is morphologically most similar to Magyaria annobonica Pérez-Íñigo, 1981 and Magyaria ornata Balogh, 1963 from the Ethiopian region in having long interlamellar setae, but differs from both by the presence of bidactylous legs (versus monodactylous in M. ornata , tridactylous in M. annobonica ), pointed rostrum (versus rounded) and reticulate prodorsum (versus not reticulate).

Figures

FIGURE 4. Magyaria leonilae sp. nov., adult: A—dorsal view (legs not shown); B—posterior part of body, lateral view; C—anterior part of body, lateral view (gnathosoma and legs not shown). Scale bar 50 μm.

FIGURE 5. Magyaria leonilae sp. nov., adult:A—ventral view (gnathosoma and legs not shown); B—posterior view; C—subcapitulum, ventral view; D—palp, left, paraxial view; E—chelicera, left, paraxial view. Scale bar 50 μm (A, B), 20 μm (C, E), 10 μm (D).

FIGURES 6. Magyaria leonilae sp. nov., adult: A—leg I, without trochanter, right, antiaxial view; B—femur and genu of leg II, right, antiaxial view; C—trochanter, femur and genu of leg III, left, antiaxial view; D—leg IV, left, antiaxial view. Scale bar 20 μm.