triclad

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triclad

an order of TURBELLARIANS with well-developed sense organs; the planarians.
References in classic literature ?
However, all these discoveries are nothing, to my mind, compared with that which I was able to make, in the presence of the acting-manager, in the managers' office, within a couple of inches from the desk-chair, and which consisted of a trap-door, the width of a board in the flooring and the length of a man's fore-arm and no longer; a trap-door that falls back like the lid of a box; a trap-door through which I can see a hand come and dexterously fumble at the pocket of a swallow-tail coat.
Turbellarians can be divided into two major groups, with no taxonomical association: the macroturbellarians or large worms, which include triclads and polyclads, and the microturbellarians including the other turbellarian groups, the members of which are smaller.
Triclads and polyclads occur generally on hard bottom, under stones, or associated with macrophytes, algae or gravel (Hyman, 1951; Du-Bois Reymond Marcus and Marcus, 1968).
Some ecological factors and their influence on competition between stream and lake living triclads.
The effect of temperature on the life-cycle of four species of lake-dwelling triclads.
Sperm resorption in triclads (Platyhelminthes, Tricladida).
The relationship between ration, reproductive effort and age-specific mortality in the evolution of life history strategies - some observations on freshwater triclads.
Age-specific mortality, to varying degrees, has been examined in studies of reproduction in freshwater triclads (Calow and Woollhead 1977) and red deer hinds (Clutton-Brock et al.
Morphological descriptive studies on the embryonic development of freshwater triclads have, until now, been mainly undertaken in organisms of the families Planariidae (Planaria and Polycelis) and Dendrocoelidae (Dendrocoelum).