The ventral striatum is characterized by an intricate neurochemical compartmentation that is reflected in the distribution of most of its afferent fiber systems. In the present study, the compartmental relationships of ventral striatal neurons projecting to the mesencephalon were studied by combining tract tracing with the immunohistochemical localization of leu-enkephalin. Injections of the re...

This paper provides a complementary description of Kuzinellus niloticus (El-Badry) based on specimens recently collected mandarin orange orchards, Citrus reticulata Blanco (Rutaceae) at Sohag governorate, Egypt. The mite were extracted using modified Tullgren funnels. predator could have role as possible biological control agent for some pests citrus trees.

Histological, morphological, genetic, and phylogenetic analyses of a Cryptosporidium molnari-like isolate from a guppy (Poecilia reticulata) identified stages consistent with those of C. molnari and revealed that C. molnari is genetically very distinct from all other species of Cryptosporidium. This study represents the first genetic characterization of C. molnari.

Thorecta reticulata Bergquist is a sponge of the family Thorectidae (order Dictyoceratida) collected from the Kaikoura Peninsula, New Zealand, by SCUBA at a depth of 20 m. Taxonomic identi"cation was provided by Professor Dame Patricia Bergquist, School of Biological Sciences, University of Auckland, and a voucher specimen (P.O.R. 436) has been deposited in the Museum of New Zealand, Wellington.

Evidence for the existence of different populations of gamma-aminobutyric acid (GABA)-ergic neurons in the substantia nigra comes partially from anatomical studies, which have shown there to be little if any overlap between the calcium-binding proteins parvalbumin and calretinin in individual neurons, suggesting that these may represent neuronal subtypes with distinct electrophysiological and/o...