OGrady et al. 2001
Datasets usually provide raw data for analysis. This raw data often comes in spreadsheet form, but can be any collection of data, on which analysis can be performed.
Figure for O’Grady, PM,Val, FC, Hardy, DE, and Kaneshiro, KY. 2001. The rustica species group of Hawaiian Drosophila (Diptera: Drosophilidae). Pan-Pacific Entomologist 77(4): 254-260.