Chromodoris aspersa (A. A. Gould, 1852)

モンコウミウシ Chromodoris aspersa

Location
Horse Shoes, Okinawa Island (Onna and Yomitan area), Okinawa, Japan
Date
2015/12/21
Length
12mm
Depth
3.0m
Water temperature
23.0℃

Description

A small chromodorid reaching 1.5 inches (ca. 3.8 cm) in length and 0.5 inches (ca. 1.3 cm) in breadth. The body is small, depressed, elongate-oval, a little the widest in front, pearl-coloured, becoming pale yellow towards the edge, and margined with pale orange. The whole upper surface is densely sprinkled with crimson (Latin puniceus) spots. The labial tentacles are subulate; the cervical tentacles are broad lanceolate, with numerous lamellae standing on a slender pedicle. The branchial star is small, about one-third the width of the back; plumules eight, lanceolate, simply pinnate; pinnae about twelve on each side, with a terminal one finely fringed. The tentacles and gills are rusty-yellow. The foot is somewhat longer than the body. The described specimen was probably a juvenile. Specimens with a greyish-yellow ground colour, or lacking the fine yellow submarginal line, are occasionally observed.

Distribution

Type locality: Vincennes Island, Paumotu Group (now Tuamotu Archipelago, French Polynesia). Based on a specimen collected by the U.S. Exploring Expedition. The species has subsequently been recorded across the Indo-West Pacific, including East Africa, Aldabra Atoll, the Seychelles, Réunion, Australia, Papua New Guinea, the Philippines, the Marshall Islands, Japan, and Hawaii.

Etymology

The specific epithet aspersa is the Latin perfect participle of aspergere ("to sprinkle, scatter"), meaning "sprinkled, besprinkled", in reference to the densely scattered crimson spots on the pearl-coloured ground.

Remarks

In the original description Gould placed the species in Doris. The species was later transferred to Chromodoris (the parentheses in the author citation reflect this generic transfer). "ゴマフリイロウミウシ" is a synonym.

References

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. cover

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, Chromodoris aspersa, is included in the book.

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Academic Database

Sea slug observation data is available in international marine biodiversity databases.

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