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Chromodoris kalawakan

Species Profile

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Chromodoris kalawakan

Author: Bonomo & Gosliner, 2020

Order: Nudibranchia  Family: Chromodorididae

Maximum Size: 20 mm

Sightings: Anilao, Philippines

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Chromodoris kalawakan Bonomo & Gosliner, 2020

This is currently the only known species of Chromodoris lacking dark lines or dark spots to the notum. Previously thought to be a Goniobranchus species it was identified as belonging to Chromodoris through the molecular sequencing of Bonomo & Gosliner, 2020.

A small species of Chromodoris up to 20 mm in length. Elongate-oval in shape, bluntly rounded anteriorly with the foot extending significantly beyond the mantle to a tapered point.

Translucent greyish-white in colour with opaque white spots on the notum. Small conical tubercles are scattered over the notum and these too have opaque white spots on their tips. Some of the tubercles are connected by diffuse white lines. The mantle margin carries a very thin, yellow, mostly continuous line. The extended tail also carries the opaque white spots. The perfoliate rhinophores have translucent stalks similar in colour to the notum whilst the clubs have white edging to the lamellae, orange to the top and a white tip. The gill is translucent white with opaque white spots and orange tinting, especially towards the tips.

Defensive mantle glands are located around the mantle margin apart from the anterior margin.

Although the specific diet of Chromodoris kalawakan is not known it is a spongivore like its fellow Chromodoris.

Distribution is the Western Pacific Ocean, specifically reported from Philippines, Palau, Indonesia and Vanuatu.

It is the Goniobranchus sp. 43 of Gosliner et al, 2018 page 160 top left.

David A. Mullins – February 2024

References:
– Gosliner, T. M., Valde ́s, A ́. & Behrens, D. W. (2018). Nudibranch & Sea Slug Identification – Indo-Pacific, 2nd Edition. New World Publications, Jacksonville, Florida, USA.

– Bonomo, L. J. & Gosliner, T. M. (2020). Adding stars to the Chromodoris (Nudibranchia, Chromodorididae) galaxy with the description of four new species. Zootaxa 4819 (3): 401-435.

Other Sea Slugs in this Family (sighted)

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