Armina magna Baba, 1955

Description

Body ground colour black, with densely set yellowish-white longitudinal lines along the dorsum. The dorsal margin, foot margin, and edge of the oral veil are bordered with orange-yellow. Rhinophores are black with orange-yellow tips. One of the larger members of Armina, reaching about 150 mm in length.

Distribution

Type locality is Sagami Bay, Japan. Recorded from the western Pacific, including Japan and the Philippines.

Etymology

From the Latin adjective magnus (large, great), feminine form magna, referring to the large body size relative to other members of the genus.

Remarks

Members of Armina are known to feed on octocorals such as sea pens, burrowing in soft sediment by day and emerging at night to forage. In the Kii opisthobranch list of Baba & Hamatani 1952, this species was reported as Armina taeniolata (Bergh) and given the new Japanese name "Hasuera-tatejima-umiushi". It was later formally described as a distinct species, Armina magna, by Baba 1955 in his Opisthobranchia of Sagami Bay.

---

References

• ハスエラタテジマウミウシ（新稱）, 馬場菊太郎 & 濱谷巌. (1952). 紀州産後鰓類目録. 南紀生物. Supplement 1: 1-11.
• 高岡生物研究会. (2002). 日本海のウミウシ. 第2版.
• ハスエラタテジマウミウシ, 中野理枝. (2004). 本州のウミウシ. ラトルズ.
• Armina magna, Terrence Gosliner, Ángel Valdés and David Behrens. (2015). Nudibranch and Sea Slug Identification Indo-Pacific. New World Pubns Inc.