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Background   Meccus ' taxonomy has been quite complex since the first species of this genus was described by Burmeister in 1835 as  Conorhinus phyllosoma . In 1859 the species was transferred to the genus  Meccus  and in 1930 to  Triatoma . However, in the twentieth century, the  Meccus  genus was revalidated (alteration corroborated by molecular studies) and, in the twenty-first century, through a comprehensive study including more sophisticated phylogenetic reconstruction methods,  Meccus  was again synonymous with  Triatoma . Events of natural hybridization with production of fertile offspring have already been reported among sympatric species of the  T. phyllosoma  subcomplex, and experimental crosses demonstrated reproductive viability among practically all species of the  T. phyllosoma  subcomplex that were considered as belonging to the genus  Meccus , as well as between these species and species of  Triatoma . Based on the above, we carried out experimental crosses between  T. longipennis  (considered  M. longipennis  in some literature) and  T. mopan  (always considered as belonging to  Triatoma ) to evaluate the reproductive compatibility between species of the  T. phyllosoma  complex. In addition, we have grouped our results with information from the literature regarding crosses between species that were grouped in the genus  Meccus  with  Triatoma , in order to discuss the importance of experimental crosses to confirm the generic reorganization of species.    Results  The crosses between  T. mopan  female and  T. longipennis  male resulted in viable offspring. The hatching of hybrids, even if only in one direction and/or at low frequency, demonstrates reproductive compatibility and homeology between the genomes of the parents.    Conclusion  Considering that intergeneric crosses usually do not result in viable offspring in Triatominae, the reproductive compatibility observed between the  T. phyllosoma  subcomplex species considered in the  Meccus  genus with species of the  Triatoma  genus shows that there is “intergeneric” genomic compatibility, which corroborates the generic reorganization of  Meccus  in  Triatoma .    Graphic Abstract

parasites and vectors

Trends in taxonomy of Triatomini (Hemiptera, Reduviidae, Triatominae): reproductive compatibility reinforces the synonymization of Meccus Stål, 1859 with Triatoma Laporte, 1832