cyphonautes


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cyphonautes

[‚sī·fə′nōd·ēz]
(invertebrate zoology)
The free-swimming bivalve larva of certain bryozoans.
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Cladocera were present only in summer and cyphonautes only in autumn.
Larvacean abundance and percentage abundance in either season, and the abundance and percentage abundance of cyphonautes in autumn, did not differ between depths.
Experiments were conducted in a simple flow tank to assess the response of settling cyphonautes larvae to shear flow and their behavior in different boundary-layer flow conditions.
and the ambient velocity ([U.sub.r]) at the level of the cyphonautes larvae ([h.sub.r] = 150 [[micro]meter]) would be
Competent cyphonautes larvae were collected from the plankton in San Juan Channel near the Friday Harbor Laboratories (San Juan Island, Washington State) by dragging plankton net with a boat during summer 1994 and were stored in the laboratory in seawater at about ambient sea temperature ([approximately equal to] 13 [degrees] C in late summer) until the experiment.
Cyphonautes larvae swim with their apical end as the leading part of the body.
These organisms are important because they are common on the wall and are also interesting because much work has been done with Spirorbis setigers (Knight-Jones 1951), bryozoan cyphonautes larvae (Keough 1984), and crawling Alcyonium planula larvae (Sebens 1983).
Late-stage larvae of Membranipora membranacea are similar in shape to a blunt-ended triangle covered in a bivalved shell and are commonly referred to as a cyphonautes larva (Fig.
Particular to the cyphonautes form are nerves that underlie feeding-related structures such as the ciliated ridges and gut.
Table 2 Structural diversity of ciliated sensory neurons among cheilostome bryzoan larvae Larval type Region of larval body Cyphonautes (1) Buguliform (2), (3) Apical disc CR and NP CR and NP Bordering the oral groove BC BC Adjacent to Ciliated tufts (IC) Ciliary whorls (IC) propulsive ciliary fields Ciliated tufts (SC) Potential IC?/Pigmented Ciliary whorls (IC)/ photosensory band of cells Pigmented neurons/Co-option near coronal cells?
Cyphonautes ciliary sieve breaks a biological rule of inference.
Cyphonautes' ciliary sieve breaks a biological rule of inference.