Taken primarily from Kozloff, 1987, 1996 p. 396 (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 page 44.
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| Lower taxonomic level | Main Page | Alphabetic Index | Systematic Index | Glossary |
| 1a | With a prominent lateral spine on both sides of the carapace at or close to the anterior end; without a distinct rostrum at the anterior end of the carapace, but with a large, anteriorly directed median spine close to the anterior end | 2 |
| 1b | Without a prominent lateral spine on both sides of the carapace at or close to the anterior end; with a distinct rostrum projecting from the anterior end of the carapace | Parapasiphae sulcatifrons |
| 2a | Lateral spines of the carapace slightly behind the anterior edge of the carapace; mostly transparent when alive, but generally spotted or tinged with red; length up to about 8 cm | Pasiphaea pacifica |
| 2b | Lateral spines of the carapace at the anterior edge of the carapace; mostly crimson when alive; length up to about 21 cm | Pasiphaea tarda |
Parapasiphae sulcatifrons
Pasiphaea pacifica
Pasiphaea tarda