STUDIES ON THE SEXUAL ORGANIZATION OF THE RIHZOCEPHALA. III. THE MODE OF SEX-DETERMINATION IN PELTOGASTERELLA
Open Access
- 1 April 1961
- journal article
- research article
- Published by University of Chicago Press in The Biological Bulletin
- Vol. 120 (2), 272-283
- https://doi.org/10.2307/1539383
Abstract
Adult females of Peltogasterella gracilis (syn. P socialis) occur gregariously on a single host-crab. Usually, females on 1 host produce eggs of 1 type[long dash]either large or small. The large eggs (160-175 [mu] in diameter) develop into large larvae which function as larval (cypris) males. The smaller eggs (140-150[mu] in diameter), on the other hand, develop into small larvae which give rise to adult females. No discernible structural difference is detected between the large-egg-producing females and the small-egg-producing females. In the meta-phase plate of the 1st maturation division of the large egg, 15 bivalent chromosomes are seen; while in the small egg a univalent chromosome is found beside 15 bivalent chromosomes. This univalent chromosome behaves like a sex-chromosome at the late stage of the first maturation division anaphase, but its exact nature is unknown.This publication has 1 reference indexed in Scilit:
- The reproductive rôle of the complemental males of peltogasterJournal of Morphology, 1942