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Hawaiian Polyclad Flatworms
(last revised 02/07/10)
Although certainly not exhaustive, this is probably the most complete illustrated listing of Hawaii's polyclad flatworms available online. Those in Hawaii's Sea Creatures are here, as well as many others. Some are likely new species; others have not been identified. Although originally in alphabetical order, the thumbnails on this page have become scrambled over time as some species were identified and given names and other species were renamed. Sorry. Someday I will redo this page. Click on the thumbnails for a larger view.

Additional polyclad flatworm photos from Hawai`i can be found in Reef and Shore Fauna of Hawaii, Section 2 edited by Dennis M. Devaney and Lucius G. Eldredge and Marine Flatworms, the World of Polyclads by Leslie Newman and Lester Cannon, published in Australia by CSIRO in 2002. The latter is the best book available on polyclad flatworms and is highly recommended. You can get it here: http://www.publish.csiro.au

A large number of polyclads from around the world are illustrated and described on the CD "Fabulous Flatworms" by Newman & Cannon. Get it here: http://www.publish.csiro.au/nid/18/pid/4850.htm

Scott Johnson contributed the photos marked with an asterisk (*).



Acotylean1

Acotylean2

acotylean3

Paraplanocera sp.1*

Paraplanocera-h03*

Euryleptid 9

Pseudobiceros sp 1

Acotylean-h02*

Flatworm-h06*

Phrikoceros sp.1*

Flatworm-h08*

Flatworm-h09*

Tytthosoceros nocturnus*

Flatworm-h11*

Cestoplana sp.2*

Maritigrella eschara

Paraplanocera marginata

Paraplanocera oligoglena

Paraplanocera
sp 1

Pericelis sp 1.

Tytthosoceros nocturnus?*

Pseudocerotid #4

prosthiostomid*

Pseudobiceros flavocanthus

Pseudobiceros gratus

Pseudobiceros hymanae

Pseudobiceros periculosus*

Pseudobiceros sp 1

Pseudobiceros sp 2.

Pseudobiceros sp 3

Pseudobicerus stellae

Pseudoceros cf dimidiatus

Pseudoceros ferrugineus

Pseudoceros jebborum

Pseudoceros imperatus

Pseudoceros paralaticlavus

Pseudoceros sp. 2.

Pseudoceros cf scintillatus

Pseudobiceros sp 4*

Pseudoceros leptostichus*

pseudocerotid #2

pseudocerotid #3

Thysanozoon or Acanthozoon*

Thysanozoon or Acanthozoon

Pseudobiceros sp. 4

acotylean4

Cestoplana

Pseudoceros rubronanus?

Cory's flatworm #8

Euryleptid?


Pseudoceros? sp.


Phrikoceros sp. 3


Phrikoceros? sp. 4


stylochid?


Callioplana marginata


Euryleptid?


Pseudocerotid #5

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  Text and photos copyright John P. Hoover unless otherwise credited