|Gonophorenentwicklung der Hydroide Myriothela = Gonophore development of the hydroid Myriothela|
Beigel, U. (1976). Gonophorenentwicklung der Hydroide Myriothela = Gonophore development of the hydroid Myriothela. Cah. Biol. Mar. 17(2): 119-129 (4plates)
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
During the development of the gonophores of Myriothela cocksi 7 stages may be distinguished. During the 1st stages, female and male gonophores show the same development; undifferentiated ectodermal cells have an important role. An entodermal evagination pushes the undifferentiated cells, which normally lie basal in the ectoderm near the hyaline Iamella, outwards against the periphery of the ectoderm. The entocodon ('Glockenkern'), composed of ectodermal cells, sinks into the entodermal evaination. Afterwards the gonogenetic cavity ('Glockenhohle') is formed. The entodermal lamellae separate themselves from the spadix and the ring-channel develops. Differences in the development of the female and the male gonophores may now be observed. The female gonophore contains many nutritive cells and later on a fecundative oocyte, which leaves the apex of the gonophore through an orifice between the entodermal lamellae. The mature male gonophore gives origin to many spermatozoids which lie in bands and leave the gonophore in the same manner.