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You are here:   OldClasses > 2012 > Pseudoceros prudhoei | Carolina Marques

 

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Pseudoceros prudhoei

Flatworm

Carolina Marques (2012)

 

 

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Summary


Physical Description


Ecology


Life History & Behaviour


Anatomy & Physiology


Evolution & Systematics


Biogeographic Distribution


Conservation & Threats


References & Links

Evolution & Systematics

The origin of turbellarians is one of the numerous evolutionary questions that are still under debate. Would the simplicity of the body be a primitive or a derived trait? Some biologists believe that turbellarians and cnidarians have a common ancestor, which place them in a basal position. Others believe that flatworms have evolved from a coelomate ancestor by pedomorphosis (evolve from a early developmental stage, e.g. larvae) or reduction (simplification of the ancestor’s body) (Ruppert et al, 2004).

 

Some studies have analysed the systematic relationships within the Policladida group based on morphological and molecular parameters. They have confirmed that the Pseudocerotidae family is a monophyletic group and that Pseudoceros is the largest genus, corresponding to 75% of the named species in the family (Litvaitis and Newman, 2001)(Rawlinson and Litvaitis, 2008).

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