Atys semistriatus Pease, 1860
- Location
- Red Beach, Okinawa Island (East coast), Okinawa, Japan
- Date
- 2017/02/18
- Length
- 8mm
- Depth
- 5.0m
- Water temperature
- 21.0℃
Description
A small cephalaspidean reaching about 8 mm in shell length. The shell is oval, contracted posteriorly, thin, fragile, pellucid and white. The aperture is slightly dilated at the base, and the apex is perforate. The shell carries transverse raised lines (sculptural striae) only at both extremities, the central portion being smooth. Pease's type-material is from Cuming's collection of Sandwich Islands shells.Distribution
Indo-Pacific. Type locality: Sandwich Islands (Hawaiian Islands), based on specimens in the Cuming collection described by Pease. Subsequently recorded from the Hawaiian Islands, southern Japan, the Philippines, Indonesia, Guam, the Red Sea and elsewhere.Etymology
The specific epithet combines Latin semi- ("half") with striatus ("furrowed, lined"), meaning "half-striated" or "striated in part", in reference to the sculptural striae confined to the two ends of the shell. Pease did not state an etymology.Remarks
Placed by Pease in Atys, where it is still currently retained. Pease originally used the feminine ending Atys semistriata; in current use the masculine combination Atys semistriatus is preferred. The Japanese name "コクテンタマゴガイ" refers to the small dark spots scattered on the shell surface.References
- Atys semistriata Pease n. sp., Pease W.H. (1860). Descriptions of new species of Mollusca from the Sandwich Islands. Part I. Proceedings of the Zoological Society of London. 28: 18-36.
- コクテンタマゴガイ（新称）, 中野理枝, 今川郁 & 今本淳. (2013). 南西諸島の後鰓類1. 頭楯亜目. ちりぼたん. 43(1-4): 1-22.
- Atys semistriatus, Terrence Gosliner, Ángel Valdés and David Behrens. (2015). Nudibranch and Sea Slug Identification Indo-Pacific. New World Pubns Inc.
- Oskars T.R., Too C.C., Rees D., Mikkelsen P.M., Willassen E. & Malaquias M.A.E. (2019). A molecular phylogeny of the gastropod family Haminoeidae sensu lato (Heterobranchia: Cephalaspidea): a generic revision. Invertebrate Systematics 33(3): 426-472.
Featured in this book
Terrence Gosliner, Ángel Valdés and David Behrens. (2018). Nudibranch and Sea Slug Identification Indo-Pacific 2nd Edition. New World Pubns Inc.
New World Publications
This species, Atys semistriatus, is included in the book.
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Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.