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Oogenesis in the terrestrial hermit crab Coenobita clypeatus (decapoda, anomura). I. Previtellogenic oocytes
Author(s) -
Komm Barry S.,
Hinsch Gertrude W.
Publication year - 1985
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051830209
Subject(s) - biology , cytoplasm , endoplasmic reticulum , oocyte , anomura , golgi apparatus , microbiology and biotechnology , ultrastructure , decapoda , ribosome , anatomy , zoology , crustacean , biochemistry , rna , embryo , gene
Ultrastructural study of previtellogenic oocytes found in cystlike clusters scattered throughout the length of the bilobed ovary of the hermit crab Coenobita clypeatus shows a high nuclear:cytoplasm ratio. Large, round nuclei containing synaptinemal complexes serve as good temporal markers for identification of previtellogenic oocytes. The cytoplasm contains many smooth‐membraned vesicles filled with granules and probably of nuclear origin. In addition to its complement of Golgi complexes, endoplasmic reticulum, mitochondria, and free ribosomes, the cytoplasm also contains stacks of annulate lamellae, a feature not previously described for decapod oocytes. Typically, the previtellogenic oocyte with its accumulation of ribosomes has the appearance of a nonsynthetic cell preparing to go through a metabolic transition.