Clark, F., and Patterson, R.T., 1993. A taxonomic key to the unilocular genera of calcareous foraminifera. Journal of Paleontology, 67:20-28.
Taxonomic keys are rarely used as an aid to the identification of foraminifera. Such keys become increasingly attractive, however, as the number of taxa which must be distinguished becomes large. The proliferation of known genera over the last 25 years is nowhere more apparent than in the unilouclar foraminifera, where the number of genera has risen from five to 46. We present herein a dichotomous key in which any species may be assigned to its proper genus by progressing through a series of steps, consisting of paired statements, in which only one choice is made at a time.