Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 92. (Budapest 2000)

Mahunka, S.: Some oribatid mites from Yemen (Acari: Oribatida) (Acarologica Genavensia LXXXVIII)

Description - Measurements: Length of body: 436-502 urn, width of body: 276-317 j-im. Prodorsum: Rostral apex pointed at tip, elongated (well observable in lateral aspect). Lamellae conspicuously converging toward each other, these and especially the translamella very narrow. Between the lamellae some fine, arched transversal lines visible (Fig. 25). Rostral setae setiform, rarely ciliate, lamellar and interlamellar ones blunter at tip and distinctly barbed. Sensillus short, with rounded head. Its surface spiculate. Notogaster: Dorsosejugal suture gradually arched medially. Sejugal porose area large. Notogastral surface ornamented by fine, indistinct foveolae and some longitudinal wrinkles in the humeral region. All the fourteen pairs of notogastral setae short, slightly dilated, distinctly barbed and no essential difference among their size and length. Among the four pairs of porose areae Aa the largest, and becoming gradually smaller toward the posterior end of body. Lateral part of podosoma (Fig. 27): Tutorium long, but weakly developed. Sublamellar porose area absent, circumpedal carina weakly developed. Only a short part of the longitudinal minitectum observable. Ventral regions (Fig. 26): Well foveolate (this sculpture is the strongest among the presently described Zygoribatula species). The surface of genital and anal plates smooth. Remarks - The new species stands closest to Zygoribatula pennata GROEBLER, 1993. It is distinguished from the latter by the sharply pointed rostral apex (rounded in pennata) and the shape of the lamellae, and the sculpture in the interlamellar region. Etymology -1 dedicate the new species in recognition of the collector Mr. A. VAN HARTEN, for his valuable material. Unguizetes yemenitica sp. n. (Figs 28-31) Material examined - Holotype: Yemen 1829, 2 paratypes from the same sample. Holotype and 1 paratype: MHNG, 1 paratype: HNHM (1554-PO-1996). Description - Measurements: Length of body: 625-676 pm, width of body: 460-552 pm. Prodorsum: Rostral apex slightly conical. Lamellae typical for the genus, with well developed cusps. Only the outer apices developed, inner margin rounded. Translamella thin, arched medially. Ratio of prodorsal setae ex ro < le < in, all setiform, finely ciliate. Sensillus small, characteristically bent outwards and backwards, its head well barbed. Notogaster: Dorsosejugal suture strongly narrowed or interrupted medially, but in this part a weaker line always observable. Pteromorphae well protruding anteriorly (in dorsal aspect), its outline arched as high as the arch of the dorsosejugal suture (Fig. 28). Surface displaying radiate lines. Notogastral surface smooth, with four pairs of round porose areae and ten pairs of setal alveoli present. Areae porosac A, located comparatively laterally. The insertion of setae lm present always behind the porose area Aa. Lateral part of podosoma (Fig. 30): Tutorium with sharp apex, rostral setae arising close to it. Pedotecta I, 11—111 and discidium large. Cusps strong, long, reaching over the pedotecta II-III. Pedotectal carina docs not reach to the ventral margin. Along the lateral margin of the ventral plate a narrow band of porose areae observable.