TY  - JOUR
AB  - The fertilization of a calcareous sponge is studied by means of the electron microscope,
in Grantia compressa F . The mature oocyte lies beneath the choanoderm; the
carrier cell is applied to its surface, and the spermiocyst enters its cytoplasm. The ultrastructural study demonstrates two formations in this spermiocyst: (i) the 'head', surrounded by a lamellar envelope, consists mainly of a nucleus with ring-shaped chromatin; (ii) a large area with a periodic structure corresponding to the modified 'middle piece' or 'mitochondrial body' of other authors.
A1  - Gallissian, M.-F.
DO  - 10.1080/01651269.1980.10553366
JO  - International Journal of Invertebrate Reproduction
SP  - 321
EP  - 329
C1  - 2: 321-329
TI  - Etude ultrastructurale de la fécondation chez <i>Grantia compressa</i> F.
UR  - https://www.vliz.be/vmdcdata/narms/narms.php?p=sourcedetails&id=365425
VL  - 2
PY  - 1980
Y2  - 2026-08-09
ER  -