Karyotypic diversity in the subfamily Eurytominae (Hymenoptera: Eurytomidae).

New data on the karyotype structure of five species of the subfamily Eurytominae are described, including the following species: Eurytoma rosae (2n = 20), E. robusta (n =7, 2n = 14), E. serratulae (n = 6, 2n = 12), E. compressa (2n = 10) and Sycophila biguttata (2n = 18). 2n = 10, 12 and 14 are reported for the first time for the Eurytominae, in which only 2n = 20 and 18 have been previously found. The taxonomic and phylogenetic implications of the new chromosomal information are discussed. Karyotypes containing ten subtelo/acrocentric chromosomes which gradually decrease in size can be considered as initial for the Eurytominae. Eurytoma robusta + (E. serratulae + E. compressa) form a particular clade where all branches are well-supported by morphological, biological and chromosomal apomorphies.