THE ORIBATID MITE FAMILIES NANHERMANNIIDAE AND LOHMANNIIDAE OF CAT TIEN NATIONAL PARK (VIETNAM)

In the oribatid mite fauna of Cat Tien National Park (southern Vietnam), we discovered four species, each representating a different genus of the family Nanhermanniidae, and eight species representing four genera of Lohmanniidae. Our records of Cosmohermannia robusta and Masthermannia mammillaris (Nanhermanniidae) are the first for the respective genera from Vietnam; the lohmanniids Meristacarus sundensis, Mixacarus exilis, Papillacarus ramosus and P. cornutus are also newly reported from this country. The morphology of juvenile instars of Cosmohermannia robusta is described and illustrated. The juve- nile instars of Cosmohermannia differs from those of Nanhermannia by the morphology of prodorsal and gastronotic setae, the presence two large latero-posterior body apophyses, the epimeral formulae, and the length of some epimeral setae. Diagnoses of juvenile instars of the family Nanhermanniidae and the genus Cosmohermannia are proposed. Papillacarus polygonatus sp. n. is described from dark loamy soil of a lagerstroemia forest; it differs from all other species of the genus by its larger body and three different forms of neotrichous setae

NEW ORIBATID MITES OF THE GENERA PERGALUMNA AND GALUMNELLA (ACARI, ORIBATIDA, GALUMNOIDEA) FROM VIETNAM

Three new species of oribatid mites of the superfamily Galumnoidea, Pergalumna cattienica sp. n., P. yurtaevi sp. n. and Galumnella microporosa sp. n., are described from Cat Tien National Park (southern Vietnam). Diagnostic keys to the Vietnamese species of Pergalumna and Asian of Galumnella are presented

ORIBATID MITES OF DONG NAI BIOSPHERE RESERVE (= CAT TIEN NATIONAL PARK) OF SOUTHERN VIETNAM, WITH DESCRIPTION OF A NEW SPECIES OF PERGALUMNA (ACARI, ORIBATIDA, GALUMNIDAE)

An annotated checklist of oribatid mite taxa in Dong Nai Biosphere Reserve (= Cat Tien National Park) with distributions is provided. We have registered 121 species, 84 genera and 45 families, of which 40 species, 27 genera, 12 families were found for the first time in Vietnam, and of which 30 species and one genus were described as are new. A new species of the genus Pergalumna, Pergalumna paraelongata sp. n., is described

A NEW SPECIES OF ORIBATID MITES OF THE GENUS MALACONOTHRUS (ACARI, ORIBATIDA, MALACONOTHRIDAE) FROM VIETNAM

A new species of oribatid mites of the genus Malaconothrus, M. adilatatus sp. n., is described from Vietnam. It differs from M. heterotrichus by the body size, morphology of interlamellar and exobothridial setae ex1 and some epimeral and leg setae. An identification key to species of the genus Malaconothrus known from Vietnam is given

THE ORIBATID MITE GENUS HAMMERELLA, WITH DESCRIPTION OF A NEW SUBGENUS AND SPECIES FROM VIETNAM (ACARI: ORIBATIDA: GRANULOPPIIDAE)

The oribatid mite genus Hammerella Balogh, 1983 (Granuloppiidae) is discussed and a new generic diagnosis is presented. Hammerella (Parawoasella) bayartogtokhi, a new subgenus and species, is proposed, based on specimens from dark loamy soil and litter (under Dipterocarpus alatus) in Vietnam. Parawoasella subgen. n. is distinguishable from other subgenera of Hammerella by the presence of dorsocentral setae in the adult, resulting in 13 pairs of notogastral setae (versus 10 pairs). An identification key to subgenera and species of Hammerella is given