Titlebook: Advances in the Biology of Turbellarians and Related Platyhelminthes; Proceedings of the F Seth Tyler Conference proceedings 1986 Dr W. Jun

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https://doi.org/10.1057/978-1-137-59783-0rate evolutionary capacity levels and to describe the possible origin of a number of invertebrate groups from various levels and their inter-relationships. My analysis on the basis of evolutionary capacity levels suggests that the deuterostomes originated early (very likely before mollusks and annel

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Contemporary Approaches to Outdoor Learningevolution of ‘higher’ metazoans from acoels related to the recent Acoela seems highly improbable..The ultrastructure of the spermatozoa of the parasitic groups of flatworms (Monogenea, Digenea, Cesto-da) is very similar to that found in the Kalyptorhynchia, a further indication that the parasitic gr

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The major parasitic platyhelminth classes — progressive or regressive evolutionggests there are various ‘evolutionary capacity levels’ occupied by major taxa. Two groups that are at the same evolutionary capacity level probably originated in common within that level, which in turn is often shared with several other groups. Morphogenesis by invagination is characteristic of an

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Initial morphological diversity as a criterion in deciphering turbellarian phylogenn those groups where these systems and mechanisms are evolutionarily most primitive. Here, such variety can involve the basic body plan of a given phylum and the types of morphogenesis characteristic of it. This correlation provides a new criterion of evolutionary primitive-ness, namely, the criteri

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