S. Mahunka szerk.: Folia Entomologica Hungarica 33/2. (Budapest, 1980)

FOLIA ENTOMOLOGICA HUNGARICA ROVARTANI KÖZLEMÉNYEK XLI (XXXIII). 2. 1980 . p. 21-22 A new Perxylobates species from Egypt (Acari, Oribatida) By B. M. BAYOUMI (Received December 1, 1979) Abstract: A new Haplozetid mite, Perxylobates mahunkai sp. n. is described from Egyptian soil samples. With two figures. Perxylobates mahunkai sp. n. Measurements: Length: 593-624 urn; width: 300-320 ujm. Prodorsum (Fig. 1): Broadly rounded in front. Rostral hair emitted laterally, inwardly curved and barbed. Lamella relatively broad, long and its tip reaching beyond insertion of lamellar hair. Latter long, barbed and about 1.5 times as long as rostral one

. Interlamellar hair also barbed, directed laterad and as long as rostral hair. Sensillus long, barbed and directed latero-posteriorly

. Notogaster: A thin dorsosejugal suture separates it from prodorsum. Ten pairs of short, thin and smooth notogastral hairs present. Three pairs of area porosae present; Aa slightly oval and the largest A-y nearly circular, A2 the smallest. Coxisternal region (Fig. 2): Apodemes weakly developed. All epimeral setae smooth and short. Epimeral surface ornamented with light polygonal foveolae. Epimeral setal formula: 3-1-2-2. All legs monodactyle. Anogenital region: Genital plate elongated, bearing 5 pairs of thin, smooth genital hairs. One pair of aggenital setae present. Anal plate broad, slightly quadrangular, with pore iad parallel to its upper edge. Two pairs of anal and 3 pairs of adanal setae present. Material examined: Holotypus: Egypt, Tanta city: clay-loamy soil cultivated with onion, U.V. 1979, leg. A. MOHAMED. 3 ex. Paratypes: from the same locality as holotype. Holotype and one paratype deposited in author's collection; 2 paratypes are deposoted in the Hungarian Natural History Museum, Budapest. Remarks: The genus Perxylobates Hammer, 1972 is characterized by having monodactyle legs, lamellar hair removed from tip of lamella, 10 pairs of notogastral setae, 3 pairs of area porosae, 5 pairs of genital and one pair of aggenital hairs. In addition, Hammer also reported the absence of a dorsodejugal suture as an important character. The new species shows all the generic characters stated by Hammer, but a dorsosejugal suture also exists. On the basis of its main characters, the new species should not be placed in a different genus. The presence or absence of a dorsosejugal suture as a generic character may be elucidated through the discovery of more new taxa. The present species is closest to P. vermiseta (Balogh et Mahunka, 1968), but may readily be distinguished from it by its barbed lamellar and Interlamellar hairs, by the dorsal and ventral sculpture (being punctate in P. vermiseta

) as well as by the shape of area porosae. I respectfully dedicate the new species to Dr. S. MAHUNKA, Hungarian Natural History Museum, Budapest for his valuable comments.