Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 92. (Budapest 2000)
Mahunka, S.: Some oribatid mites from Yemen (Acari: Oribatida) (Acarologica Genavensia LXXXVIII)
Ventral regions (Fig. 29): The surface of this region without any peculiar sculpture. Apodemes short, epimeral borders hardly observable. All epimeral setae ciliate and well observable. Anogenital setal formula: 6-1-2-3. Genital setae ordered in longitudinal, arching rows. Setae in anal and adanal regions much shorter than the epimeral or genital setae. Legs: All legs tridactylous, heterodactyly observable. The surface of the claws finely serrate. cp7 and cp2 arising on a common tubercle. Remarks - The research results on this genus and species were contributed by WALLWORK (1965). The new species may well be differentiated from all these, especially by the lack of rostral tooth, the presence of dsj, the position of setae lm and that of area porosa A 1. B AYOUMI & AL-KHALIFA ( 1985) published the presence of U. reticulatus WALLWORK, 1965 in Saudi Arabia. It might well be that our data refer to this species, however, the published figure is so primitive and full of errors that identification is impossible. Etymology - The species is named after its origin. Pilogalumna arabica BAYOUMI et AL-KHALIFA, 1986 (Figs 32-35) On the basis of some main features (ratio of prodorsal setae, form and position of porose area, measurements, etc.) the newly collected series of a Pilogalumna species is identifiable with the original description (BAYOUMI & AL-KHALIFA 1986) and the figures of Pilogalumna arabica. The drawings given by the authors are primitive and full of errors. On this ground, I give some new figures of this interesting species (Figs 32-35). * * * Acknowledgements - I am very grateful to Dr. B. HAUSER, Curator in the Museum d'Histoire naturelle, Geneva for allowing me to study this valuable material. The research was supported by the Hungarian Scientific Research Fund (OTKA 16729). REFERENCES AOKI, J. ( 1964): Some oribatid mites from Laysan Island. - Pacif. Insects 6: 649-664. BAYOUMI, B. M. & M. S. AL-KHALIFA (1985): Oribatid mites (Acari) of Saudi Arabia. - Fauna of Saudi Arabia 7: 66-92. BAYOUMI, B. M. & M. S. AL-KHALIFA (1986). Two new oribatid mites (Acari: Oribatida) from Saudi Arabia. - Acta Arachnol. 35: 15-21.
