Carlson & Hoff, 2000
Known only from the Marshall Ids.
western seaward reef, Kwajalein Atoll, Marshall Ids. Nocturnally active in caves and ledges at depths of about 10 to 20 meters. Size: preserved length of about 28mm. Note characteristic brown lines on side of foot/body in lower photo. PHOTOS: Scott Johnson.
Very soft and flaccid as compared with the more typical rigid feel of the body of a Halgerda. It is very similar in colour to Halgerda willeyi. The one external difference noted by the authors is that H. johnsonorum has brown spots and lines along the side of the body, under the mantle whereas H. willeyi does not. Carlson & Hoff note differences in the anatomy of the reproductive system and radular morphology.
• Carlson, C.H. & Hoff, P.J. (2000) Three new Pacific species of Halgerda (Opisthobranchia: : Nudibranchia: Doridoidea). The Veliger, 43(2): 154-163.
Rudman, W.B., 2000 (June 26) Halgerda johnsonorum Carlson & Hoff, 2000. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/halgjohn