Journal ArticleDOI
Spermiophagy by the spermathecal epithelium of the salamander Eurycea cirrigera
TLDR
The spermathecae of Eurycea cirrigera are exocrine glands in the cloaca that secrete a substance that bathes sperm stored in the lumen after mating and prior to oviposition.Abstract:
The spermathecae of Eurycea cirrigera are exocrine glands in the cloaca that secrete a substance that bathes sperm stored in the lumen after mating and prior to oviposition. Many sperm remain in the spermathecae after oviposition, and the spermathecal epithelium becomes spermiophagic. Pseudopodia enclose sperm into endocytic vacuoles. The vacuoles become associated with primary lysosomes in the cytoplasm. Following formation of secondary lysosomes and resulting condensation of the sperm fragments, residual bodies are exocytized into the surrounding connective tissue stroma. By the start of the next breeding cycle, most sperm remaining from the previous mating have been degraded, but some sperm remain in the lumen, and the viability of these sperm is unknown.read more
Citations
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BookDOI
The Biology of Plethodontid Salamanders
TL;DR: This famous book will not become a unity of the way for you to get amazing benefits at all, but, it will serve something that will let you get the best time and moment to spend for reading the book.
Journal ArticleDOI
Segment-specific morphological changes in aging Brown Norway rat epididymis.
Valerie Serre,Bernard Robaire +1 more
TL;DR: Aging of the epididymis was accompanied by the emergence of characteristic features of aging and activation of the immune system, and there were many cell- and segment-specific changes.
Journal ArticleDOI
Female sperm storage in amphibians.
TL;DR: A phenetic analysis of variation in spermathecal characters reveals patterns of convergence in certain spermatic characters in unrelated taxa that breed in similar habitats, and proposes how the packaging of sperm in structurally different types of sperMathecae may influence male paternity.
Journal ArticleDOI
Comparative biology of sperm storage in female salamanders.
David M. Sever,R. Brizzi +1 more
TL;DR: Females in seven of the ten families of salamanders possess cloacal glands called spermathecae that store sperm, and this character has phyletic value as well as being highly conserved within the Salamandroidea.
References
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Journal ArticleDOI
A Comparative View of Sperm Ultrastructure
TL;DR: A comparative study of mammalian sperm showed common structure but species differences in the thickness of the outer fibers length of the midpiece and overall diameter of the tail, consistent with the interpretation that the axoneme is capable of functioning independently of a mitochondrial energy source but that the long middle piece of vertebrate sperm has evolved to meet the energy requirements of the accessory outer fibers.
Journal ArticleDOI
Role of Contractile Microfilaments in Macrophage Movement and Endocytosis
TL;DR: One of us has found that the peripheral or cortical cytoplasm of macrophages contains a network of microfilaments, some of which may be inserted into the plasma membrane and bind heavy meromyosin.
Book ChapterDOI
12 - Sperm Competition in Amphibians
Tim Halliday,P. A. Verrell +1 more
TL;DR: Among urodeles, the necessary conditions for sperm competition, internal fertilization, multiple mating by females and sperm storage are widespread, and several recent studies provide evidence that it has been very important in the evolution of urodele sexual behavior.
Book ChapterDOI
Transport and Survival of Spermatozoa in Female Amphibia
Claude Boisseau,Jean Joly +1 more
Journal ArticleDOI
The ultrastructure of the spermatheca in the red spotted newt
TL;DR: Each outpocketing, or tubule, when studied in thin section with the electron microscope showed a wall consisting of two components, a continuous inner or lining layer of epithelial cells and an outer covering layer of myoepithelial cells.