This section consists of three parts:

1. An alphabetical (by genus) listing of the 150 species described herein (see List of described species).

2. A phylogenetic classification of the 150 species described herein (see Classification of described species). Family-level taxonomy is primarily that of Riedel (1967b), Goll (1968; 1969), Foreman (1973), and Sanfilippo and Riedel (1980).

3. Description sheets for 150 species (see Species descriptions). These sheets include a brief synonymy, usually consisting of the original designation and a more recent description, a modern description of the taxon, dimensions, distinguishing characters, variability, stratigraphic and geographic distribution, phylogeny, and an illustration. All illustrations are x215 unless otherwise noted.