Is the genus Potamophylax (Trichoptera: Limnephilidae) highly polymorphic?

Oláh János
Acta Entomologica Musei Nationalis Pragae 57(1): 253-257, 2017
Published online: 30th June 2017
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Abstract: The present deprived state of taxonomy gives no appropriate resources for taxonomists to apply more sophisticated phenomic tools and to carry out more appropriate population sampling. Without fine structure analysis of large population samples there is no hope to discover speciation traits and there is no chance to delineate young incipient sibling species with subtle but stable shape divergences. Phylogenetic species complexes of these incipient species are frequently mistaken with species polymorphism. However, historical polymorphism is a sympatric phenomenon based on discontinuous variation inside a panmictic population and not between geographically isolated populations. I continue to consider Potamophylax mista (Navas, 1918) a valid species following the evidence given by Oláh et al. (2013).
Key words: Trichoptera, Potamophylax, polymorphism, polyphenism
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