Goniobranchus decorus

Goniobranchus decorus is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.

Goniobranchus decorus
Goniobranchus decorus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Order: Nudibranchia
Suborder: Doridina
Superfamily: Doridoidea
Family: Chromodorididae
Genus: Goniobranchus
Species:
G. decorus
Binomial name
Goniobranchus decorus
(Pease, 1860)[1][2]
Synonyms[3]
  • Chromodoris decora (Pease, 1860)
  • Chromodoris ndukuei Risbec, 1928
  • Doris decora Pease, 1860 (original combination)
  • Glossodoris (Chromodoris) ndukuei (Risbec, 1928)
  • Glossodoris decora (Pease, 1860)
  • Glossodoris ndukuei (Risbec, 1928)

Taxonomic history

This species was known as Chromodoris decora for many years before it was transferred to the genus Goniobranchus on the basis of molecular (DNA) evidence in 2012.[4]

Distribution

This species was described from Hawaii.[1] It has been confused with Goniobranchus setoensis and many records are therefore misidentifications. It occurs in the western Pacific Ocean from Hawaii to the Marshall Islands and New Caledonia. The two species are sympatric in the Marshall Islands.[5][6]

Description

The body of this chromodorid nudibranch is translucent white with opaque white lines, purple spots and a sub-surface margin of orange-red. There is usually a white line around the centre of the back which can extend into patches of white running towards the midline. The midline itself is usually marked with white patches or a broad white stripe with diffuse edges. Within the white are a few purple spots and these usually form a line down the centre of the back, always with a halo of white around them. The tips of the rhinophores and the outer part of the gills is white.[6]

Ecology

Goniobranchus decorus feeds on sponges of the family Aplysillidae including Chelonaplysilla violacea.

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References
  1. Pease, William Harper. 1860. Descriptions of new species of Mollusca from the Sandwich Islands. Proceedings of the Zoological Society of London, pt. 28, pp. 18-36.
  2. Pease, W.H. 1871. Descriptions of new species of Nudibranchiate Mollusca inhabiting Polynesia. No.2. American Journal of Conchology. 7 (1): 11-19
  3. Bouchet, P. (2014). Goniobranchus decorus (Pease, 1860). Accessed through: World Register of Marine Species on 2014-11-27
  4. Johnson R.F. & Gosliner T.M. (2012) Traditional taxonomic groupings mask evolutionary history: A molecular phylogeny and new classification of the chromodorid nudibranchs. PLoS ONE 7(4): e33479.
  5. Scott Johnson (2015) Goniobranchus decorus. [In] Underwater Kwajalein
  6. Rudman, W.B., 2007 (September 13) Chromodoris decora (Pease, 1860). [In] Sea Slug Forum. Australian Museum, Sydney. (Description includes both G. decorus and G. setoensis)
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