General: Body elongate, narrow. Notum outline with four invaginations; edge has a ruffled appearance. Dorsum covered with numerous, densely packed elongate tubercles or projections, oriented in different directions, forming a zigzagging pattern in some areas. Velum wide, forming two triangular lateral projections, with several frontal irregular indentations. Rhinophores short and wide, with 9 simple lamellae, located on anterior end of notum. Rhinophoral sheaths elongate, with 12 branched papillae around distal edges. Foot smooth, rounded posteriorly, visible dorsally at posterior end and in notum invaginations. Background color of notum black. Dorsal tubercles primarily white to greyish-brown near posterior notum, giving the body a light appearance, becoming darker towards head, turning completely black on anterior notum; this gives a black and white appearance with a greyish transitional area mid-length, forming a wedge of black pigment. Notum edge primarily white, except for anterior-most end that becomes dark grey. Velum completely black. Rhinophoral sheaths black with grey edges. Rhinophores with black stalks and beige sheath papillae and clubs. Foot dark grey, surrounded by a thin white line.
Size: 82 mm (preserved)
Published depth range: 1733 m
Habitat description: Benthic, hard substrate.
Spatial distribution: Guide Seamount
ReferencesEncyclopedia of Life
Tree of Life
World Register of Marine Species
National Center for Biotechnology Information
Valdés, A., L. Lundsten, and N.G. Wilson (2018). Five new deep-sea species of nudibranchs (Gastropoda: Heterobranchia: Cladobranchia) from the Northeast Pacific. Zootaxa 4526 (4): 401–433.
Citation: Tritonia nigritigris (Valdés, Lundsten, and Wilson 2018) Deep-Sea Guide (DSG) at http://dsg/mbari.org/dsg/view/concept/Tritonia%20nigritigris. Monterey Bay Aquarium Research Institute (MBARI). Consulted on 2019-05-21.