ORDER : POLYCLADIDA
Sub order : COTYLEA
Super family : Pseudocerotoidea
Family : Pericelididae

Pericelididae Laidlaw, 1902

- Pseudocerotoidea with elongate oval or almost circular form of the body, with a pair of infolded marginal tentacles, each bearing a cluster of eye-spots

- Only a single genus Pericelis

Pericelis      Laidlaw, 1902

Ethymology :
      - Peri = around, celis = spot or stain ( a reference to eyes around the periphery)

Ventral characteristics :
      - They have a large, highly ruffled, central pharynx
      - Very small eyes are continuous around the body margin, cerebral eyes are in two elongate clusters and frontal eyes are also present
      - These flatworms resemble acotyleans, especially in the shape of the large ruffled pharynx and the presence of marginal eyes

Dorsal characteristics :
      - Species of Pericelis are relatively large in size, extremely soft and have a ruffled margin
      - The tentacle are well separated, simple, pointed folds of the anterior margin, with numerous small eyes.The tentacles may be difficult to distinguish from the ruffled margin


Publications :

Faubel, 1984 : The Polycladida, Turbellaria. Proposal and establishment of a new system. Part II. The Cotylea. Mitteilungen des hamburgischen zoologischen Museums und Instituts 80. 189–259.
    Newman, L.J. & Cannon, L.R.G. (2003). Marine Flatworms: the world of Polyclads. CSIRO Publishing : Melbourne 112