Key:  Order Sacoglossa

Phylum Mollusca
 Class Gastropoda
  Subclass Opisthobranchia

[Sacoglossans are mostly small, greenish herbivores, though some species feed on opisthobranch eggs.  Some have shells, while others have no shells but have ridges, folds, or papilli on the back.  Most have rolled, tube-like rhinophores]

Taken primarily from  Kozloff, 1987, 1996 p. 242 (Copyright 1987, 1996, University of Washington Press.  Used in this web page by permission of University of Washington Press)
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Lower taxonomic level Main Page Alphabetic Index Systematic Index Glossary
1a Cerata present (there may also be a pair of rhinophores); without parapodia (broad lateral outgrowths of the foot) 2
1b Cerata absent; with well developed parapodia that may be turned up to cover the dorsum or spread flat against the substratum Elysia hedgpethi
2a Cerata (about 10) limited to the posterior half of the body; body mostly black (head and tail pale gray) Olea hansineensis
2b Cerata (usually more than 10) on both the anterior and posterior halves of the body; body not black (except in Aplysioipsis smithi) 3
3a
3b
4a
4b
5a
5b
6a
6b
7a
7b
8a
8b
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
26a
26b
27a
27b
28a
28b
29a
29b
30a
30b
31a
31b
32a
32b
33a
33b
34a
34b
35a
35b



Taxonomic Levels Represented in This Key:

  Elysia hedgpethi



Page created by Dave Cowles, 2006
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