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Breakdown of Known Hawaiian Opisthobranchs by Group

Group # spp.
%
Cephalaspidea (trad.)
95
18.1
     Acteonoidea
11
2.1
     Cephalaspidea 82
15.6
     Runcinacea
2
0.4
Thecosomata 25
4.8
Gymnosomata 5
1.0
Anaspidea 14
2.7
Sacoglossa 64
12.2
Notaspidea (trad.)
18
3.4
     Tylodinoidea 4
0.8
     Pleurobranchomorpha 14
2.7
Nudibranchia 305
58.0
     Doridacea 190
36.1
          cryptobranchs
142
27.0
          phanerobranchs
48
9.1
     Dendronotacea 18
3.4
     Arminacea 6
1.1
     Aeolidacea 91
17.3
Total
526

 
For those who are interested in figures for the benthic fauna, the following table excludes the pelagic/planktonic species in the Thecosomata and Gymnosomata as well as Stylocheilus longicauda, Cephalopyge trematoides, Phylliroe bucephala, Doto sp. #1, Tergipes sp. #1, Fiona pinnata, Glaucus marginatus and Glaucus atlanticus.
Group # spp.
%
Cephalaspidea (trad.)
95
19.5
     Acteonoidea 11
2.2
     Cephalaspidea 82
16.8
     Runcinacea
2
0.4
Anaspidea 13
2.7
Sacoglossa 64
13.1
Notaspidea (trad.) 18
3.7
     Tylodinoidea 4
0.8
     Pleurobranchomorpha 14
2.9
Nudibranchia 298
61.1
     Doridacea 190
38.9
          cryptobranchs
142
29.1
          phanerobranchs
48
9.8
     Dendronotacea 15
3.1
     Arminacea 6
1.2
     Aeolidacea 87
17.8
Total
488

 
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