Biology:Cephalopyge
Cephalopyge is a genus of pelagic nudibranchs comprising the single species Cephalopyge trematoides, a free-swimming marine gastropod in the family Phylliroidae.[1]
Etymology
Cephalopyge is a contraction of cephalus (Greek: κεφαλή kephale, "head") and pyge (πūγή, "behind") referring to the position of the anus close to the head. The species epithet trematoides expresses a likeness to flukes.[2]
Description
Cephalopyge trematoides grows to 2.5 cm (0.98 in) in length. It swims at approximately 12 cm/s (4.7 in/s), by passing several undulatory waves down its body each second.[3] It is flattened and transparent; its internal organs are visible.[4]
Pelagic nudibranchs
Of the approximately 3000 species of nudibranch, the vast majority are benthic, only a couple are neustonic, and Cephalopyge trematoides is very unusual in that it is pelagic.[5][6] It is estimated to be one of only five planktonic nudibranch species (another epipelagic example is Phylliroe bucephala).[7]
Further information (including photos):
- Nudibranch Encyclopedia Kousuke Chibi (in Japanese)
- Seaslugs of Hawai'i by Cory Pittman and Pauline Fiene
References
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedwormsspecies - ↑ Lalli, Carol M.; Gilmer, Ronald W. (1989). Pelagic Snails: The Biology of Holoplanktonic Gastropod Mollusks. Stanford University Press. ISBN 9780804714907. https://books.google.com/books?id=yIAfwz5cxPMC&pg=PA214.
- ↑ Sea Slugs of Hawaii
- ↑ Marine species identification portal: Cephalopyge and Cephalopyge trematoides.
- ↑ J.E. Steinberg, The pelagic nudibranch, Cephalopyge trematoides (Chun, 1889), in New South Wales with a note on other species in this genus, Proceedings of the Linnean Society of New South Wales 81:184-192 (1956) [1]
- ↑ G.M. Mapstone & M.N. Arai, Siphonophora (Cnidaria, Hydrozoa) of Canadian Pacific Waters, p.33. "The best documented predators of pelagic cnidarians from the phylum Mollusca are the neustonic nudibranchs and snails [...and] the pelagic nudibranch [...]"
- ↑ Orso Angulo-Campillo, Gerardo Aceves-Medina and Raymundo Avedaño-Ibarra, Holoplanktonic mollusks (Mollusca: Gastropoda) from the Gulf of California, México [2]
External links
Wikidata ☰ {{{from}}} entry
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