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Panstrongylus lignarius and P. herreri

Panstrongylus lignarius is an exclusively sylvatic species of Brazil, Guyana, Suriname, Venezuela, and perhaps Ecuador and found naturally infected by T. cruzi. Panstrongylus herreri from Peru and Ecuador, adapted to other habitats through its trophic link to guinea pigs and is the main domestic vector in northern Peru.31,137 Both species are morphologically and morphometrically (Gumiel, personal communication) difficult to distinguish, and although no intermediate forms have been found,7 they cross-fertilize giving rise to hybrids.106 No nucleotide difference was detected between their ITS-2 sequences, suggesting that there is

only one species.101


As can be seen from the above examples, the phylogenetic concepts (mainly PHG II) have been the most efficient techniques to retrieve ancestry and discuss the validity of supraspecific levels (genera, etc.). They were less useful (or less used) to discuss the species status of various entities. For species status discussion, the biological and evolutionary definitions of the species were more helpful (or more used).

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