Pilosocereus (Cactaceae): the in , Daniela C. Zappi, D. Hunt, 1994, 0951723448, 9780951723449, 160 pages. .

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Daniela Zappi wrote her doctoral thesis on the Pilosocereus of Brazil and this book is a translation of that work. The focus of the genus in Brazil doesn't detract from its value as a study of the entire genus. Ample informatin is given covering the history of discovery and nomenclature of this group of cacti, which was only starting to be understood at the time this book was written in 1988. Daniela made many trips to the field, studied preserved materials, and living secimens of field-collected plants. Being a thesis, this book contains a good deal of technical information, such as charts, graphs, and microscopic photos of seeds, but it is also quite useful to the casual cactus grower who would like a better understanding of the genus. Aside from information on the genus in general, detailed description are given for the various species. Many line-art illustrations are included, mostly drawn by Zappi herself and a section in the middle of the book contains color photos of the various species. Distribution maps are also included. The book is 160 pages, published in 1994.

ABSTRACT: Drosophila gouveai Tidon-Sklorz & Sene and Drosophila antonietae Tidon-Sklorz & Sene (Diptera: Drosophilidae) are two cactophilic sibling species that belong to the Drosophila buzzatii cluster, which comprises seven species living in . D. gouveai uses the decaying stems of Cactaceae of the genus Pilosocereus as breeding sites, whereas D. antonietae is mainly associated with hildmannianus K. Schum. In this article, we investigate the effect that growing in alternative host cacti may have on fitness-related traits, developmental time and viability, relevant for species that live in ephemeral resources. Both species were reared in seminatural media prepared with fermenting tissues of either Pilosocereus machrisis Y. Dawson or C. hildmannianus. Our results show that the specific differences in the traits analyzed are host dependent. Overall, both species performed very well in P. machrisis, whereas survival in C. hildmannianus differed dramatically between species. The viability of D. antonietae was lower than in P. machrisis, whereas D. gouveai barely survived in C. hildmannianus. The results are discussed in relation to biogeographic, morphological, and molecular evidence, and they stress the need to assess the relative significance of host use in diversification of the D. buzzatii cluster.

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