Author: Undescribed

Order: Nudibranchia  Family: Discodorididae

Maximum Size: 18 mm

Sightings: Milne Bay, PNG

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Thordisa sp. 04 Undescribed

Oval in shape, reddish-brown in colour, lighter at the mantle margin, a darker patch between the rhinophores. The notum is covered in small conical tubercles some extending into thin translucent tendrils. The rhinophores are brown the white flecks on the the edges of the lamella. The gill is light brown with white flecks.

Feeds on sponges. Found under coral plates and rubble.

David A. Mullins – January 2025

References:
– Chan, J. M. & Gosliner, T. M. (2007). Preliminary Phylogeny of Thordisa Nudibranchia: Discodorididae) with Descriptions of Five New Species. The Veliger, 48(4): 284–308.

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

– Donohoo, S. A. & Gosliner, T. M. (2024). Variability in the white spot: a new genus and species of Discodorididae (Nudibranchia) from the central and western Pacific Ocean. Journal of Molluscan Studies 90: eyad027