Taken primarily from Kozloff, 1987, 1996 p. 393 (Copyright 1987, 1996, University of Washington Press. Used in this web page by permission of University of Washington Press)
An excellent alternate, up-to-date key can be found in Wicksten, 2009 on page 15
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| Lower taxonomic level | Main Page | Alphabetic Index | Systematic Index | Glossary |
| 1a | Pereopods 1-3 obviously chelate [and the rostrum is usually obvious] | Family Penaeidae |
| 1b | Pereopod 1 not chelate, and pereopods 2 and 3 with small, inconspicuous chelae [rostrum usually very small or missing (photo)] | Family Sergestidae |
Family Penaeidae
Family Sergestidae