Goniobranchus fabulus Soong & Gosliner, 2022

External morphology. Living animals 12–18 mm in length. Body oval with three marginal bands on the mantle edge. Notum smooth with no apparent spots. Six to ten unipinnate gill branches. Eleven or twelve lamellae on rhinophores. The color pattern exhibits two distinct morphotypes. Morphotype A (Fig. 4a–c) has a creamy opaque white body. The outermost portion of the mantle edge is tinged an opaque bluish white, followed by a deep red band, followed by a yellow submarginal band, and then an opaque white band, with all bands having similar widths. Gill branches and rhinophores are reddish purple with white edges. Morphotype B (Fig. 4d) has an opaque creamy white body. The outermost portion of the mantle edge is surrounded by a speckled opaque white band, followed by a deep red band, a yellow submarginal band, and then an innermost opaque white band. The gill and rhinophores are reddish purple with white edges and opaque white speckles.

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References

• クロモドーリス・プレキオーサ, 中野 理枝. (2004). 本州のウミウシ.
• Chromodoris preciosa, Helmut Debelius, Rudie H. Kuiter. (2007). Nudibranchs of the World.
• ハスイロウミウシ(新称), 中野理枝, 朝倉知子, 池田紫, 石川雅教, 今本淳, 岩瀬南美, 西田和記, 堀江諒, 山田久子, 渡井久美. 2017. 奄美大島北部海域における後鰓類相の調査報告. Kuroshio Biosphere 11. 41-60. +5pls.
• Goniobranchus fabulus sp. nov., Giun Yee Soong, Lynn J. Bonomo, James D. Reimer, Terrence M. Gosliner. (2022). Battle of the bands: systematics and phylogeny of the white Goniobranchus nudibranchs with marginal bands (Nudibranchia, Chromodorididae)