Ardeadoris angustolutea (Rudman, 1990)

Location: Sunabe Water Treatment Plants, Okinawa Island (Chatan and Southern area), Okinawa, Japan
Date: 2016/12/20
Length: 10mm
Depth: 7.0m
Water temperature: 24.0℃

Description

Mantle elongately ovate with a broad overlap, and a large fold on each side midway between the gills and the rhinophores. Rhinophore clubs long and tapering, set in raised pockets. Simple gills form an arc that opens posteriorly around the anal papilla, with a fast flickering motion. Mantle translucent creamy white with an opaque-white midline band over the viscera (running from in front of the rhinophores to just behind the gills) and another opaque-white band around the margin, with a thin orange-yellow line right at the edge. Foot translucent white with a yellowish tinge and an opaque-white marginal band. Rhinophore stalks transparent or translucent white; lamellae light brown to orange-red, with white anterior and posterior midline bands on the club. Gills translucent with the lower half opaque white; lamellae brown to orange-red, giving the upper half of each gill a reddish-brown appearance. Reaches about 25 mm in body length.

Distribution

Type locality is the north-west side of Ruby Reef on the Great Barrier Reef, Queensland, Australia (15°44′S, 145°47′E; 10 m depth, December 1984, on a purple sponge). A western-Pacific tropical species recorded from the Great Barrier Reef, the Marshall Islands (Enewetak Atoll), and the Philippines (Palawan). Subsequent records extend to Papua New Guinea, Thailand, Samoa, and Japan.

Etymology

The specific epithet angustolutea is a Latin compound of angustus (narrow) and luteus (orange-yellow), referring to the narrow orange-yellow line at the mantle margin (verbatim from the original description).

Remarks

Originally described as Noumea angustolutea and later transferred to Ardeadoris. Among species of the Chromodoris aureomarginata colour group, this one is distinguished by its thin orange-yellow mantle line and brownish-tinged rhinophores and gills. Feeds on purple sponges.

Photographed by 名谷朋浩

Description

Distribution

Etymology

Remarks

References

A Kindle field guide by the site author

Seasonality

Shooting Locations

Photos of Ardeadoris angustolutea

Same Genus Nudibranchs

Academic Database