Humped Ancula
Ancula gibbosa (Risso, 1818)
Description 2
Body white to yellowish-white, with a narrow, yellow to orange line extending postero-medially from between the rhinophores to the branchial plumes and continuing from posterior of the branchial plumes to the tip of the tail. Similar line on each side extends posteriorly along the dorso-lateral margin, from the rhinophores to the extra-branchial appendages; and continues between extra-branchial appendages and for a short distance posterior of them (these lines may be discontinuous). Rhinophores perfoliate with 8-10 lamellae, tip of clavus yellow to orange. Each rhinophore with two extra-rhinophoral appendages which have subapcial band of yellow to orange. Branchial plumes 3, bi- and tripinnate, yellowish-white with yellow to orange tips. With 4-5 or more yellow to orange tipped, extra-branchial appendages on each side. Labial tentacles digitiform.
Size 2
Typically about 10mm in length but may reach 32mm.
Geographic Range 2
Alaska, to San Diego, CA; Europe.
Notes 2
Preys on the entoproct Barentsia ramosa<?i>.
Synonyms 2
Ancula pacifica MacFarland, 1905
References 2
MACFARLAND, F. M. 1966. Studies of opisthobranchiate mollusks of the Pacific coast of North America. Memoirs of the California Academy of Sciences 6:1-546, pls. 1-72. PDF
McDONALD, G. R. 1983. A review of the nudibranchs of the California coast. Malacologia 24(1-2):114-276. PDF
SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2018. A taxonomic listing of benthic macro- and megainvertebrates from infaunal & epibenthic monitoring and research programs in the southern California bight, edition 12, 1 July 2018, xviii + 167 pp. PDF
Additional Info 2
Sources and Credits
- (c) Gary McDonald, all rights reserved, uploaded by Gary McDonald
- (c) Gary McDonald, some rights reserved (CC BY-SA)
More Info
iNat Map
| Body | limaciform |
|---|---|
| Classification | Doridina |
| Rhinophores | perfoliate |
| Dorsum | smooth |
| Labial tentacles | digitiform |
