Borealea nobilis explained

Borealea nobilis is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Flabellinidae.^[1]

Distribution

Borealea nobilis was described from a single specimen dredged in 145 m depth off Cape Cod in 1879. It is widely distributed in the northern Atlantic Ocean from Norway south to Ireland and on the North American coast south to New England.^[2]

Description

This species is translucent white with opaque white markings. The digestive gland in the cerata is either orange or red in colour. The rhinophores are pale yellow-brown in colour and covered with small papillae.^[3]

Notes and References

1. Picton, B. (2017). Borealea nobilis (A. E. Verrill, 1880). In: MolluscaBase (2017). Accessed on 2018-01-12.
2. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=567597 ITIS
3. http://www.seawater.no/fauna/mollusca/nobilis.html seawater.no
4. Welch J. J. (2010). "The “Island Rule” and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. .
5. Rudman, W.B., 2001 (June 28) Flabellina nobilis (Verrill, 1880). [In] Sea Slug Forum. Australian Museum, Sydney. Retrieved April 13, 2015^[3]

   This species grows to 40–50 mm (4–5 cm) in length. The maximum recorded body length is 63 mm.^[4]

   Ecology

   Minimum recorded depth is 20 m. Maximum recorded depth is 190 m.

   References