Magyaria krisztinae, Mahunka, 2008

Mahunka, S., 2008, A New Genus And Some Other Data Of Oribatids From Thailand (Acari: Oribatida), Acta Zoologica Academiae Scientiarum Hungaricae 54 (2), pp. 125-150 : 141-143

Magyaria krisztinae sp. n.

( Figs 38–43 )

Diagnosis: Rostrum protruding. Lamellar apex bifurcate, with long inner part. Bothridium with sharply pointed inner and outer margins. Sensillus directed backwards, with lanceolate head. Rostral and lamellar setae setiform, interlamellar setae minute. Pteromorphae linguliform, movable. Whole notogastral surface with polygonal pattern. Ten pairs of alveoli or minute notogastral setae present. Surface of epimeral region, whole ventral plate and anal plates ornamented by polygonal pattern. Genito-anal setal formula: 4–1–2–3. Setae ad 3 in preanal position. All legs monodactylous.

Material examined: Holotype: Thailand: Tham Sakoen National Park headquarters, 29–30.

11. 2003. Leg. L. PEREGOVITS (No. 21). Holotype (1743-HO-2007): HNHM.

Measurements: Length of body: 433 µm, width of body: 289 µm.

Prodorsum: Rostral apex rounded medially, excavated laterally. Surface of the anterior part of rostrum punctate, behind of which polygonate pattern observable on the prodorsum ( Fig. 43 ). Lamellar apex bifurcate, its outer part with two minute teeth, inner ones narrow, directed anteriorly. Rostral and lamellar setae setiform, distinctly barbed laterally, rostral ones slightly shorter than lamellar setae. Interlamellar setae minute. Bothridium large, its inner and outer margins bearing large, spiniform projection. Sensillus ( Fig. 40 ) curved backwards, its peduncle long, sensillar head comparatively small, lanceolate, covered by short bristles.

Notogaster: Pteromorphae large, auriculate in dorsal-, linguliform in lateral view. Dorsosejugal suture convex. Surface of pteromorphae and notogaster ornamented by poplygonal pattern. A narrow band anteriorly with narower lines, the other part with thicker lines separated from each other ( Fig. 42 ). Ten pairs of minute notogastral setae and 4 pairs of small sacculi present. Some setae represented only by their alveoli. Surface of genital plates ornamented by elongate alveoli.

Lateral part of podosoma: Tutorium large, well punctate, rostral setae arising on its cusp. Pedotecta 1 narrow, small, on its basal part ciliate exobothridial seta situated. Circumpedal carina reaching to the lateral margin of ventral plate ( Fig. 43 ).

Ventral parts ( Fig. 39 ): Infracapitulum ornamented by alveoli anteriorly and polygonal pattern basally. Setae h minute. Epimeral surface with polygonal pattern. Apodemata weakly developed, sejugal apodema reaching to the genital aperture. Epimeral borders hardly observable. Epimeral setae short and setiform, setae 1c and 3c longer than others. Genito-anal setal formula: 4–1–2–3. Anterior genital setae much longer than the others. Whole surface of ventral plate ornamented also by polygonal pattern, but consisting of mostly round polygons. Aggenital and anterior adanal setae located near to each other. Anal plates also with polygonate pattern. Posterior adanal setae arising in posterolateral position.

Legs: Strongly damaged, not studied.

Remarks: The new species is well characterised by the closed pattern of the notogastral surface, the bilateral large bothridial spines, the elongate alveoli on the genital plates, and by the pattern of the ventral plate. This combination of the features is unknown in the heretofore species of the genus Magyaria BALOGH, 1958 .

Etymology: I dedicate the new species to Mrs. KRISZTINA TEMESVÁRI-POZSÁR, researcher of the Zootaxonomical Research Group of Hungarian Academy of Sciences and Eötvös University, for her help in my scientific work.

Figures

Figs 38–43. Magyaria krisztinae sp. n. – 38 = body in dorsal view, 39 = body in ventral view, 40 = trichobothrium, 41 = rostrum in lateral view, 42 = sculpture of notogaster, 43 = rostral part of