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worms > Phylum Platyhelminthes > Class Turbellaria > Order Polycladida
Marbled flatworm
Pseudoceros sp. 1
Family Pseudocerotidae
updated Feb 2020

Where seen? This small flatworm is sometimes seen on Beige sheet asicidians that are growing under rocks. So far, only seen on our Northern shores.

Features: 1-3cm long. Body pale beige with irregular dark markings, irregular dark stripe along the middle. Body margin with irregular dark bars perpendicular to the margin and a fine narrow orange line cutting across the dark bars near the body edge. Has a pair of pseudotentacles made up for simple folds of the body edge.

What does it eat? When one flatworm was removed, there was a circular hole in the encrusting ascidian under it. Did the flatworm eat the ascidian?

Tanah Merah, Dec 10
 

*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

Marbled flatworms on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores


Pulau Ubin, Jun 21
Photo shared by Toh Chay Hoon on facebook.
   


Pasir Ris Park, Dec 20
Photo shared by Jianlin Liu on facebook.

Pasir Ris Park, Jan 21
Photo shared by Jianlin Liu on facebook.

Pasir Ris Park, Jan 21
Photo shared by Jianlin Liu on facebook.


Changi, Jun 20
Photo shared by Jianlin Liu on facebook.

Chek Jawa, Jul 18
Photo shared by Jianlin Liu on facebook.

Chek Jawa, Jul 18
Photo shared by Jianlin Liu on facebook.


Chek Jawa, Jul 16
Photo shared by Toh Chay Hoon on facebook.

Chek Jawa, Jun 17
Photo shared by Loh Kok Sheng on facebook.

References
  • Rene S.L. Ong and Samantha J.W. Tong. 29 October 2018. A preliminary checklist and photographic catalogue of polyclad flatworms recorded from Singapore. Nature in Singapore 2018 11: 77–125
 
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