Reticulidia halgerda
Brunckhorst & Burn, 1990

Order: NUDIBRANCHIA
Suborder: DORIDINA
Family: Phyllidiidae

DISTRIBUTION

Known from the central and western Pacific Ocean (including Fiji and the Marshall Islands), from eastern Australia to Taiwan.

PHOTO

UPPER: Collected subtidally, North West Island, Great Barrier Reef, dorsal view of 62 mm specimen, PHOTO: J. Brodie (Brunckhorst, 1993: Plate 9G).
LOWER: Koumac, New Caledonia, October 1993,
Photo: Bill Rudman

Notes compiled from Brunckhorst, 1993:
Reticulidia halgerda differs both internally and externally from species of Phyllidia and Phyllidiopsis which possess yellow coloration and tuberculate ridges. Reticulidia halgerda does not possess spiculose tubercles, but has smooth reticulate ridges on the notum whereas Phyllidia ocellata, Phyllidia tula, Phyllidia varicosa and Phyllidia coelestis have yellow capped tubercles and a different foregut.

Reticulidia halgerda lacks the broad bluish white border of Reticulidia fungia and there are numerous, narrow ridges (fewer, broad ridges in R. fungia).

Reference:
• Brunckhorst, D.J. (1993) The systematics and phylogeny of Phyllidiid Nudibranchs (Doridoidea). Records of the Australian Museum, Supplement 16: 1-107.

Authorship details
Rudman, W.B., 1998 (March 23) Reticulidia halgerda Brunckhorst & Burn, 1990. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/retihalg

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