Taken primarily from Kozloff, 1987, 1996 p. 332 (Copyright 1987, 1996, University of Washington Press. Used in this web page by permission of University of Washington Press)
| Jump to: | ||||
| Lower taxonomic level | Main Page | Alphabetic Index | Systematic Index | Glossary |
| 1a | Pleon with 4 or 5 visible free pleonites, plus the pleotelson | 2 |
| 1b | Pleon with not more than 3 visible or partly free pleonites, plus the pleotelson (pleonite 1 is hidden beneath pereonite 7) | 15 |
| 2a | Uropod with both rami well developed, these usually lamellar in form (photo); not capable of rolling up into a ball; not boring in wood or kelps | 5 |
| 2b | Uropod with a rudimentary and more or less clawlike exopodite; capable of rolling up into a ball; boring in wood or kelps | 3 |
| 3a | ||
| 3b | ||
| 4a | ||
| 4b | ||
| 5a | None of the pereopods with large, hooklike dactyls for attachment to fishes (but there may be small hooks) (photo) | 6 |
| 5b | Pereopods 1-3, or all pereopods, with large, hooklike dactyls for attachment to fishes | 9 |
| 6a | Posterior border of telson fringed by about 26 short, simple setae; anterior edge of cephalon with an inconspicuous rostrum; on rocky shores, among mussels, etc. | Cirolana harfordi |
| 6b | Posterior border of telson fringed by long, plumose setae; anterior edge of cephalon with an obvious spatulate rostrum; on sandy shores | 7 |
| 7a | Telson broadly rounded or almost truncate posteriorly | Excirolana linguifrons |
| 7b | Telson somewhat angular posteriorly | 8 |
| 8a | Tip of angular portion of telson rather sharply pointed | Excirolana kincaidi |
| 8b | Tip of angular portion of telson rounded | Excirolana vancouverensis |
| 9a | ||
| 9b | ||
| 10a | ||
| 10b | ||
| 11a | ||
| 11b | ||
| 12a | ||
| 12b | ||
| 13a | ||
| 13b | ||
| 14a | ||
| 14b | ||
| 15a | ||
| 15b | ||
| 16a | ||
| 16b | ||
| 17a | ||
| 17b | ||
| 18a | ||
| 18b | ||
| 19a | ||
| 19b | ||
| 20a | ||
| 20b | ||
| 21a | ||
| 21b | ||
| 22a | ||
| 22b | ||
| 23a | ||
| 23b | ||
| 24a | ||
| 24b | ||
| 25a | ||
| 25b |