Halgerda batangas

Order : NUDIBRANCHIA
Suborder : EUCTENIDIACEA
Infraorder : DORIDACEA
Superfamily : DORIDOIDEA
Family : Discodorididae

DISTRIBUTION
Tropical Western Pacific.

One of a group of white species of Halgerda with orange markings. This species is characterised by tubercles with an orange-red tip and a mantle colour pattern consisting of a network of solid red-orange lines. There is a white band around the mantle edge containing low rounded orange-capped tubercles. The mantle tubercles range in size from low rounded bumps to tall prominent structures. The small tubercles have an orange-red tip and a basal ring of white. The large tubercles are tipped wih orange-red and have a broad subterminal white band. Beneath the white band the sides of the large tubercles have the reticulate pattern found on the mantle.

There are three species of Halgerda with a network of orange lines. In H. malesso the network of lines sometimes fuse to form orange patches in the depressions, there are multiple fine orange lines around the mantle edge, and the fairly high tubercles are capped with orange. In Halgerda batangas, which also has a network of orange lines, the ridges and tubercles are low and rounded. The tubercles are capped with orange-red and have a basal ring of white. The edge of the mantle is white with orange-red tubercles. The foot is edged with orange. The third species with an orange network is Halgerda terramtuentis. It has golden orange lines and the tubercles are capped with white.