Atys semistriata
Pease, 1860

Family: Haminoeidae


under a coral slab on the hard reef flat in front of Afono village, north Tutuila Island, American Samoa, 20 May 2000. PHOTO: Don Barclay.
LOWER: Shell of 8mm long animal; shell 6.1 x 3.5mm; Piti Bomb Hole, Guam: 19 July 1995. Coll. by John Starmer. PHOTO: C. Carlson.

"Atys semistriata appears to have a fairly wide Western Pacific distribution. We have photos from Atsushi Ono that probably represent this species as well as material from Indonesia. The red color can be very sparse or be present on almost all of the mantle. Various degrees of dark specking can be found on the headshield and parapodia. The Hancock's Organs differ from the ribbon like forms we see in most haminoeids. In A. semistriata they appear to be a line of papilla or platelets along the side of the head into the neck area. These organs in Guam animals are yellow. A. semistriata is most commonly found at night on algae covered material. During the day they can be occasionally found under rocks or coral rubble." .... C.Carlson & P.J.Hoff.

For further photos see message below.

• Pease, W.H. (1860) Descriptions of new species of mollusca from the Sandwich Islands. Proceedings of the Zoological Society of London, 28: 18-36.

Authorship details
Rudman, W.B., 2000 (May 24) Atys semistriata Pease, 1860. [In] Sea Slug Forum. Australian Museum, Sydney. Available from

Related messages

  1. Atys semistriata from Samoa
    From: C.Carlson & P.J.Hoff, June 4, 2000
  2. Another Samoan haminoeid
    From: Don Barclay, May 25, 2000

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