ABSTRACT The male genital system of the water mite, _Unionicola aegyptiaca_ consists of an accessory gland, two spherical testes, two vasa deferentia, common vas deferens, an ejaculatory complex and spermatopositor (penis) and is supported with the male genital skeleton. It is evident that each testis is enclosed in a very thin amorphous layer (basal lamina) and consists of a germinal ... Read more

The oribatid mite _Trimalaconothrus crassipes_ n. sp. was described for the first time from the roots of the floating aquatic plant, _Eichhornia crassipes_, River Nile, Girga, Sohag, Egypt. The present species has the characteristic features that are in accordance with those of family Malaconothridae and genus_ Trimalaconothrus_. The present species has specific characters compared with characters of other species of ... Read more

ABSTRACT: _Unionicola aegyptiaca_ was described for the first time from the freshwater mussel,_ Caelatura__aegyptiaca,_ River Nile, Sohag, Egypt. The descriptive characters of the present species are in accordance with those of the superfamily, family and the genus. The present species has a specific characters compared with characters of other species of the same genus. These characters are summarized as follows: ... Read more

ABSTRACT A description is given for a new species of free living water mites belonging to the genus _Eutetranychus_. The descriptive characters of the present species are in accordance with those of family, subfamily, tribe and the genus. The specific characters of the present species, the identity of the sire and ifs distribution in Awlad- Nousier canal in Sohag, Egypt ... Read more

Abstract The fine structure of haemocytes in the freshwater mite Unionicola tetra/uTcatus is described and compared with other species of invertebrates. The present study reveals that the haemocytes consist mainly of two types; agranulocytes and granulocytes. The granulocytes is subdivided into 7-types (I-VD). The granulocytes are more abundant, larger in' size with smaller nuclei and larger amount of granulated cytoplasm. ... Read more