Titlebook: Aquatic Oligochaeta; Proceedings of the T Ralph O. Brinkhurst,Robert J. Diaz Conference proceedings 1987 Dr W. Junk Publishers, Dordrecht 1

forebear

Oligochaetes and oligochaete research in the Zoological Museum and Institute, Hamburgorked in Hamburg from 1887 till his death in 1937. In the year 1900 he compiled in “Das Tierreich” all species of Oligochaeta known until that time. On the basis of systematic studies he published fundamental works on the phylogeny and geographical distribution of oligochaetes. More than 150 publica

核心

被告

Spermiogenesis in , and the phylogenetic position of the Lumbriculidae (Oligochaeta, Annelida)c events follow the general microdrile pattern, some features are peculiar: chromatin is clumped in the first stages and its condensation is very irregular, as in .. Manchette geometry is similar to that of hirudineans, as the microtubules are helically arranged from the very early stages. A number

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Unusual model of lumbriculids’ helical muscles: comparison with body wall muscles in other microdril and sarcotubules crossing the fibres from one side to another. These act as a sequence of pivots for mechanical and functional control during contraction. Myosin filaments are equally ribbon-shaped, and in the XZ plane they appear sigmoid. All these characteristics can be deduced from a comparison

Temporal-Lobe

Ultrastructural features of gametogenesis during the life cycle in , Beddard (Oligochaeta, Tubificidpattern for the family, however, some interesting peculiarities are pointed out. The regression of sexual apparatus after reproductive period and its regeneration up to a new period of sexual maturity, has been followed throughout the year.

prosthesis

Physiological reactions of aquatic oligochaetes to environmental anoxiafrom laboratory stress (unnatural sediment, starvation, accumulation of toxic substances) than from lack of oxygen per se. . feeds under anoxia at 6 °C at a low rate and survives more than 40 days. A sudden transfer into anoxic water, however, results in a cessation of defaecation before the gut is

Isolate

Mawkish

inflame

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