Original Published Description:
Ardila, N.E., J.M. Díaz (2002) Armina juliana (Gastropoda: Nudibranchia: Arminidae), a new species from the Southern Caribbean Boletín de Investigaciones Marinas y Costeras 31: 25-31
The living animals are bright red in color with contrasting white longitudinal notal ridges; the anterior margin of the oral veil and the apical portion of the rhinophores are also white. The body is elongated, flattened, narrowing posteriorly. The notum bears 34 longitudinal dorsal ridges, whose margins do not exhibit any black spots of shimmer pigment. The oral veil is small but clearly distinct, with the lateral extension curved backwards and shorter than the widest part of the body. There are two large club-shaped rhinophores, each one with about 10 vertical lamellae. The genital opening is located on the right side, anterior to and below the branchial lamellae. The anal papilla is located slightly behind the midpoint (3/5 of total length, from the anterior end of the body). The radular formula is 27 x 33.1.33 in the holotype. The rachidian tooth is broad and bears 12 elongated denticles on each side of the median cusp. The reproductive system is diaulic. The ampulla is very long, wide and convoluted. The prostate is short and convoluted, composed of two regions. The vagina is short and connected directly to the rounded bursa copulatrix.
This species is only known from the type locality off Cabo de La Vela and Palomino, Colombia
This species lives on muddy bottoms (460-300 m depth)