Abstract：
:Cryptic species occur within most of the major taxonomic divisions, and a current challenge is to determine why some lineages have more cryptic species than others. It is expected that cryptic species are more common in groups where there are life histories or genetic architectures that promote speciation in the absence of apparent morphological differentiation. Chromosomal rearrangements have the potential to lead to post-zygotic isolation and might be an important factor leading to cryptic species. Here we investigate the potential role of chromosomal change in driving speciation in the karyotypically diverse scale insect genus Apiomorpha, focussing on four species placed in the same species group (the A. minor species group Gullan, 1984). Using mitochondrial and nuclear DNA sequence data, we find that Apiomorpha minor is not monophyletic and consists of at least nine cryptic species. Diploid chromosome counts range from 2n=4 to 2n=84 across the four currently recognized species, and some of the chromosomal variation exists in the absence of other genetic or host use differences, consistent with karyotypic changes being involved in lineage divergence and the generation of cryptic species.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Mills PJ,Cook LGdoi
10.1016/j.ympev.2014.03.015subject
Has Abstractpub_date
2014-08-01 00:00:00pages
126-35eissn
1055-7903issn
1095-9513pii
S1055-7903(14)00115-8journal_volume
77pub_type
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