Reading a book on Drosophilia, I discovered the answer to the question of why no new genera of fruit flies have evolved in Hawaii despite the hundreds of species. It is due simply to the classification approach used by Drosophilia workers. The Hawaiian lineage is apparently descended from within the genus Drosophilia, as presently defined. Based on cladistic terminology, one genus should not give rise to another genus. Rather than reclassifying the 2000 or so "Drosophilia" into multiple genera, fruit fly workers use a variety of subgenera and informal terms to group them. In fact, genus names have been proposed for some of the Hawaiian lineages.
Dr. David Campbell
"Old Seashells"
Biology Department
Saint Mary's College of Maryland
18952 E. Fisher Road
St. Mary's City, MD 20686-3001 USA
dcampbell@osprey.smcm.edu, 301 862-0372 Fax: 301 862-0996
"Mollusks murmured 'Morning!'. And salmon chanted 'Evening!'."-Frank Muir, Oh My Word!
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