Chromodoris orientalis

Chromodoris orientalis
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Nudibranchia
Family: Chromodorididae
Genus: Chromodoris
Species:
C. orientalis
Binomial name
Chromodoris orientalis
Rudman, 1983

Chromodoris orientalis is a species of colourful nudibranch in the family Chromodorididae. It is a white sea slug with irregularly spaced black spots and a yellow, orange, or brown ring around its whole body and on its gills.

Distribution

They are commonly found in Sagami Bay and on the Echizen Coast of Japan. They are also less frequently seen in Taiwan, Hong Kong, and Korea.

Description

Chromodoris orientalis is translucent white with oval black spots on the mantle. The edge of the mantle has a narrow orange border and the rhinophore clubs and outer gill surfaces are orange. The rhinophores are scent and taste receptors that protrude on the front of the sea slug, the gills protrude on the opposite end from the rhinophores. They, like other sea slugs, use their foot to move around, which they protect with a thick mantle that secretes toxins. The maximum size and weight of these animals is unknown.

Diet

Chromodoris orientalis have various feeding methods and are generally carnivorous. They feed on sponges, hydroids, bryozoans, entoprocts, and ascidians.

Defense

This species is thought to be good at camouflaging and hiding in tight crevices. Related nudibranchs have been known to accumulate sponge toxins in their mantle.

Reproduction

An example of a similar egg whorl laid by Tambja capensis.

Chromodoris orientalis lay eggs in long ribbons that are attached along one side to algae or potentially other substrates. Egg size was studied among them and three others in the Chromodoris genus, and it was found that eggs size varied among species but did not change within species depending on the parental body length. The number of egg whorls also varied depending on the species. They reproduce sexually and are simultaneous hermaphrodites (as are all nudibranchs), possessing both male and female reproductive organs at the same time. When they mate, they dart their penises at one another, with the first to penetrate the other becoming the male parent. Their eggs are laid in whorls, which then hatch to become vestigial veliger larvae until they grow into adults.

References

  1. ↑ Caballer, M. (2015). Chromodoris orientalis Rudman, 1983. In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2015-12-06
  2. ↑ Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. Classification and nomenclator of gastropod families. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. ISBN 3-925919-72-4. ISSN 0076-2997. 397 pp.
  3. ↑ Masayoshi, Nishina (August 29, 2001). "Chromodoris orientalis from Japan". seaslugforum.net.
  4. ↑ Serene, P. R. (1952-06-16). "Etude d'une collection de stomatopodes de l'Australian Museum de Sydney [Study of a collection of stomatopods from the Australian Museum, Sydney]". Records of the Australian Museum. 23 (1): 1–24. doi:10.3853/j.0067-1975.23.1952.617. ISSN 0067-1975.
  5. ↑ Chan, Tin-yau (1994). Hong Kong biodiversity museum (Thesis). The University of Hong Kong Libraries. doi:10.5353/th_b3198194. hdl:10722/30178.
  6. 1 2 Rudman, W.B., 2001 (July 5) Chromodoris orientalis Rudman, 1983. [In] Sea Slug Forum. Australian Museum, Sydney.
  7. ↑ Nakano, Rie; Hirose, Euichi (May 26, 2011). "The Veiliger". Field Experiments on the Feeding of the Nudibranch Gymnodoris spp. (Nudibranchia: Doridina: Gymodorididae) in Japan. 51 (2). Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan: 66–75.
  8. ↑ Faulkner, DJ; Ghiselin, MT (1983). "Chemical defense and evolutionary ecology of dorid nudibranchs and some other opisthobranch gastropods". Marine Ecology Progress Series. 13: 295–301. Bibcode:1983MEPS...13..295F. doi:10.3354/meps013295. ISSN 0171-8630.
  9. ↑ Avila, C; Paul, VJ (1997). "Chemical ecology of the nudibranch Glossodoris pallida:is the location of diet-derived metabolites important for defense?". Marine Ecology Progress Series. 150: 171–180. Bibcode:1997MEPS..150..171A. doi:10.3354/meps150171. hdl:10261/150343. ISSN 0171-8630.
  10. ↑ Allan, Joyce K. (1932-04-20). "A new genus and species of sea-slug, and two new species of sea-hares from Australia". Records of the Australian Museum. 18 (6): 314–320. doi:10.3853/j.0067-1975.18.1932.736. ISSN 0067-1975.
  11. ↑ Trickey, Jennifer S.; Vanner, Jennifer; Wilson, Nerida G. (November 2013). "Reproductive variance in planar spawningChromodorisspecies (Mollusca: Nudibranchia)". Molluscan Research. 33 (4): 265–271. Bibcode:2013MollR..33..265T. doi:10.1080/13235818.2013.801394. ISSN 1323-5818.
  12. ↑ Miller, M. C.; Willan, R. C. (July 1986). "A review of the New Zealand arminacean nudibranchs (Opisthobranchia: Arminacea)". New Zealand Journal of Zoology. 13 (3): 377–408. doi:10.1080/03014223.1986.10422671. ISSN 0301-4223.

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