Upper & Lower Right: ex Ev Marcus - no data on slide. Possibly Holotype. Lower left: Labelled 'Hyps marci? Aug 1977. Ilha Dos Porcos' by Ev Marcus. [I assume 'Ilha Dos Porcos' refers to a place just south of Rio de Janeiro, Brazil]. Photographers: unknown. Photos identified by Ev Marcus.
This species was described from one specimen collected in northern Brazil, and one from off Venezuela in the Caribbean. The Venezuelan specimen was accompanied by a color slide of the living animal. Here is a verbatim copy of the original description of the external colour:
'The colors of the preserved slug agree perfectly with those of the slide; blue and black and white are well preserved. The slide shows a red line along the notal brim and the gills are red to the sides of the dark blue rachis. Dorsally and ventrally to the red brim there are big blackish blue spots corresponding to the subnotal glands, whose apertures are seen in the red streak. Dividing the areas of the glands from one another and from the nootum is a white band. Towards the middle of the back, the white pigment is interrupted by two dark blotches. In the middle of the back the white pigmentleaves small areas free around the blue notal glands. These stipples are often eye spots with a light blue centre. Along the sides of the notum there are larger light blue flecks. The hyponotum has the same elements, and a number of transverse white streaks go to the border of the foot, yellowish in the slide. The sole is whitish. ... The rhinophores have blue tips ... '
• Marcus, Ev. (1970) Opisthobranchs from northern Brazil. Bulletin of Marine Science, 20: 922-951.
Rudman, W.B., 2002 (September 17) Hypselodoris marci Marcus, 1970. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/hypsmarc