Key To The Onuphidae
This key is organised in a slightly different way to the others in this section. Please select the appropriate character by clicking on the image or text. This will then take you to the next set of characters and so on down the page. If you make a mistake then go back to the previous level using the back a level option.
The most recent treatment of this family was given by H. Paxton 1986. Generic revision and relationships of the Family Onuphidae (Annelida: Polychaeta). Records of the Australian Museum 38:1-74.
(Images are adapted from Day (1967), Fauchald (1973, 1974) and Paxton (1986))
| A. 2 or more anterior segments strongly modified | B. Anterior segments not strongly modified |
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| A. 2 or more anterior segments strongly modified | |
| A.i Only first two segments modified | A.ii More than two segments modified |
| Paradiopatra
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| A.ii More than 2 anterior segments strongly modified | ||||
| Modifed segments with pseudocompound falcigers | Modified segments with hook-shaped setae | |||
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Americonuphis
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Antennae
short Rhamphobranchium
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Antennae
long Longibranchium
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| B. Anterior segments not strongly modified | |
| B.i Tentacular Cirri Present
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B.ii Tentacular Cirri Absent |
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| B.i Tentacular cirri present | |||
| C. Branchiae | |||
| C.i
Absent
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C.ii Simple
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C.iii
Spiral |
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| C.iii Branchiae spiral | |
| Antennae with short ceratophores | Antennae with long ceratophores |
Diopatra
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Heptaceras
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D. Branchial position |
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D. i Branchiae start on S1 Onuphis
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| D.ii Branchiae start on S6 | ||||||||
| E. Number of rings on ceratophore | ||||||||
E. i Ceratophores 3-7 rings Kinbergonuphis
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E.ii Ceratophores 10-25 rings
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| Back to previous choice | Dorsal Cirri Long Hirsutonophis
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Dorsal Cirri Short Australonuphis
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| B.ii Tentacular Cirri Absent | ||
| Branchiae | ||
Present as simple filaments |
Present -spiral |
Absent |
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Hyalinoecia
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Epidiodiopatra
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Hyalinoecia |
