This 1987 book examines the structure, as seen by the scanning and transmission electron microscopes, of the spermatozoa of insects, centipedes, millipedes and onychophorans.

Highlighting caecilians, salamanders, and frogs and toads, this book synthesizes current literature and original research and describes the anatomy, histology, cytology, and molecular mechanisms that regulate reproductive cycles. Devoting separate chapters to males and females, it discusses gonad structure and development, gametogenesis, urogenital connections, and reproductive tracts. Heavily illustrated with original schemes and photographs, the text investigates somatic and germ cell origin during formation of undifferentiated gonads as well as embryonic and post-embryonic development, direct development, neoteny, and modifications in gametogenesis and meiosis in hybrids and polyploids.

This volume contains original contributions from an international group of authors with the highest reputations in their respective areas of phylogenetic and reproductive studies on salamanders and newts. A full panoply of topics is covered, from morphology of gametes and reproductive systems to considerations of behavior and life history, all plac

This book covers the major aspects of phylogeny and reproductive biology of frogs in chapters written by major authorities. Topics treated are: anuran phylogeny, classification and reproductive modes; gross anatomy of the reproductive system; oogenesis; endocrinology of reproduction; spermatogenesis and the mature spermatozoon; breeding glands; int

This book contains the proceedings of the International Symposium on the Mechanisms of Sexual Reproduction in Animals and Plants, where many plant and animal reproductive biologists gathered to discuss their recent progress in investigating the shared mechanisms and factors involved in sexual reproduction. This now is the first book that reviews recent progress in almost all fields of plant and animal fertilization. It was recently reported that the self-sterile mechanism of a hermaphroditic marine invertebrate (ascidian) is very similar to the self-incompatibility system in flowering plants. It was also found that a male factor expressed in the sperm cells of flowering plants is involved in gamete fusion not only of plants but also of animals and parasites. These discoveries have led to the consideration that the core mechanisms or factors involved in sexual reproduction may be shared by animals, plants and unicellular organisms. This valuable book is highly useful for reproductive biologists as well as for biological scientists outside this field in understanding the current progress of reproductive biology.