Morphometric analyses of Palaearctic Dasineura and Jaapiella species developing in flower heads of Asteraceae, with description of four new species
Sylven, E.; Lindberg, B.
Entomologica Scandinavica 29(3): 241-265
Morphometric studies of males and females of species of oligotrophine Cecidomyiidae reared from flower heads of seven genera of Asteraceae (Centaurea, Cirsium, Hieracium, Hypochoeris, Inula, Reichardia, and Saussurea) demonstrated, despite great overall morphological conformity, many instances of statistically significant differences between the species. Measurement values of structures in adult specimens were corrected for allometric deviations according to a procedure representing a further development of a method previously used for taxonomic purposes in gall midges. No galls produced by these midges have been observed. Beyond adults, also pupae and larvae were studied. Two Dasineura species and several Jaapiella species are represented. Four new species are described: Dasineura vulgatiformiae Sylven, Jaapiella hypochoeridis Sylven, Jaapiella pilosellae Sylven, and Jaapiella reichardiae Sylven.