Pluteus


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pluteus

[′plüd·ē·əs]
(invertebrate zoology)
The free-swimming, bilaterally symmetrical, easel-shaped larva of ophiuroids and echinoids.

Pluteus

 

the larva of a sea urchin or ophiuran. A pluteus has paired appendages, or arms, inside which are calcareous skeletal needles. The larva swims by means of its arms, which are fringed with ciliated epithelium. Only part of its body is metamorphosed into the adult; the rest of the body and the arms atrophy.

pluteus

1. A low barrier placed between columns.
2. A screen of pierced marble which surrounds the choir or sanctuary of a church.
References in periodicals archive ?
However, periodic variability in food level can also significantly affect pluteus arm length.
Failed cloning was documented in this study with the production and rapid disintegration of an embryo-like bud on the aboral surface of an experimental pluteus (Fig.
The time required for developmental stages (prism, 2-and 4-arm pluteus) to be completed, was also estimated by the duration taken for at least 50% larva to achieve the particular stage (Fujisawa, 1993; Rahman et al., 2002).
For biochemical analyses, we used the material from 22 ripe females at the following stages: unfertilized eggs; embryos at 2-4 blastomeres (2 hr postfertilization), 16 blastomeres (3 hr), early blastula 1 (4.5 hr), and mid-blastula 2 (9.5 hr); and larvae at late blastula 1 (12 hr), prism 2 (25.7 hr), early pluteus 2 (34.3 hr), and mid-pluteus 1 (47.5 hr).
rosea copepodits 29.993 26 Appendicularia 4.291 13 Fishes eggs 0.082 5 Meroneuston (larvae) Nemertea (Muller) 0.002 1 Polychaeta (11 types) 16.446 24 Sipunculida (pelagosphaera) 0.002 1 Barnacles (nauplius + cypris) 0.606 11 Decapod crustaceans 0.258 11 Bryozoa(cyphonaute) 2.410 19 Gastropoda (bilobed larvae) 0.007 2 Bivalvia (right charnel 21.118 18 + umbonated) Echinodermata (pluteus) 0.419 11 Total 92.243 %
Avances en el conocimiento del genero Pluteus (Fungi, Agaricales) en Nueva Galicia, Mexico.
(Flora, Agaricus, Coprinopsis, Cortinarius, Entoloma, Ophiocordyceps, Pluteus, Na, SS, Vi).
F: Antiphonarium, seu, Magnus liber organi de gradali et antiphonario: Color Microfiche Edition of the Manuscript, Firenze, Biblioteca medicea laurenziana, Pluteus 29.1, introd.
In additional studies, we found that these antagonists protected the late larvae (prism and pluteus stages) from chlorpyrifos-induced lethality.
Many marine invertebrate groups with different adult forms have similar larvae (such as the trochophore larva of mollusks and annelids, or the pluteus larva of sea urchins and brittle stars), and these similar larval forms are usually considered to be examples of either convergent evolution by natural selection or functional constraints on the evolution of early stages in development (Jagersten 1972; Strathmann 1988; Raff and Kaufman 1991; Wray 1992, 1995).
At hatching, these embryos separated from one another and swam apart as distinct individuals that proceeded to form normal pluteus larvae.
Albatrellus caeruleoporus, Amanita jacksonii, Hydnellum ferrugineum, Hymenochaete damicornis, Pluteus salicinus, Ramaria araiospora var.