The biology of a coelodendrid: a mesopelagic phaeodarian radiolarian

Swanberg, Neil R.; Bennett, Paul; Lindsey, J. L.; Anderson, O. Roger

doi:10.1016/0198-0149(86)90105-6

Cited by 22 publications

(18 citation statements)

References 8 publications

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“…The genus Coelographis (Coelodendridae) is observed to be sometimes connected to each other by their styles (Swanberg et al 1986 ). Tuscaretta globosa Borgert and Tuscaridium cygneum (Tuscaroridae) are attached on the surface of an intricate "latticed sphere" composed of siliceous rods (Haecker 1908a , Fig.…”

Section: Mode Of Lifementioning

confidence: 99%

“…The central capsule is a spherical protoplasmic body which has the endoplasm and one or two large spherical nuclei containing a signifi cant number of chromosomes. The endoplasm contains mitochondria, digestive vacuoles, endoplasmic reticulum and several Golgi bodies (Swanberg et al 1986 ) (Fig. 9.2 ).…”

Section: Malacomamentioning

confidence: 99%

“…They fl oat in the water column presumably by maintaining the neutral buoyancy (Swanberg et al 1986 ).…”

Section: Mode Of Lifementioning

confidence: 99%

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Phaeodaria: Diverse Marine Cercozoans of World-Wide Distribution

Nakamura

Suzuki

2015

Marine Protists

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Phaeodarians are unicellular marine protists characterized by the "central capsule" containing the nucleus, the "phaeodium", or mass of brown particles, and a siliceous skeleton called the "scleracoma". Phaeodaria have long been classifi ed as a member of the Radiolaria; however, this protist group now belongs to the phylum Cercozoa. The ancestor of phaeodarians is thought to have appeared in the upper Triassic Epoch according to the fossil record. They reproduce by cell division and swarmer production. These plankton are heterotrophic, and they presumably feed on organic materials suspended in the water column or capture other plankton. Although this group is widely distributed in the world ocean from the surface to deep waters, they have attracted little attention from marine researchers partly because their abundance has long been underestimated. Recent study, however, revealed that phaeodarians are more numerous than expected, and their high abundance is sometimes reported. Considering their occasional high biomass and the fact that their scleracoma is made chiefl y from silica, this plankton group plays an important role in local ecosystems and has a large impact in the silica cycle of the ocean. Knowledge of phaeodarian is indispensable for future oceanography; therefore the hitherto-known information on this marine protist is comprehensively reviewed in this chapter.

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Section: Mode Of Lifementioning

confidence: 99%

Section: Malacomamentioning

confidence: 99%

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Phaeodaria: Diverse Marine Cercozoans of World-Wide Distribution

Nakamura

Suzuki

2015

Marine Protists

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“…These omnivorous generalists appear to act as samplers of particulate material in their surroundings as they feed. They feed on detritus and a variety of cells ranging in size from bacteria to small metazoans, including microalgae and protozoans (Gowing 1986, Swanberg et al 1986, Gowing 1989, Nijthig & Gowing 1991, Gowing & Garrison 1992. Their vacuoles typically contain siliceous debris such as pulverized diatom frustules.…”

Section: Introductionmentioning

confidence: 99%

Large virus-like particles from vacuoles of phaeodarian radiolarians and from other marine samples

Gowing¹

1993

Mar. Ecol. Prog. Ser.

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Large icosahedral virus-like particles (LVLPs) ranging in dameter from ca 300 to 750 nm occurred in food or waste vacuoles of phaeodarian radiolarians collected in the Paciflc Ocean, the Sargasso Sea and the Weddell Sea. The samples were from coastal to open-ocean waters, surface waters to 2000 m depth, and a variety of seasons. A few LVLPs were also found in bulk sediment trap material, in zooplankton guts and fecal pellets, and in minipellets. Phaeodarians are unique among small marine organisms because they carry a record of their past feeding activity within their phaeodium, a collection of food and waste vacuoles. This probably explains why they often contain abundant LVLPs. Phaeodarians appeared to have acquired the LVLPs while feeding on sinking or suspended particulate material. Calculations based on serial sections indicate that a single phaeodarian could contain thousands of LVLPs. Although their hosts have not been determined, LVLPs are clearly ubiquitous. These particles are being called LVLPs because of similarities in morphology with viruses, but they could be as yet unidentified microorganisms, a type of spore, or possibly an organelle of a eukaryote.

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“…The skeleton of this family possesses several long branch-like extensions called styles (Nakamura & Suzuki 2015a), by which 2-3 individuals are occasionally connected together forming a colony (Fig. 2R, Swanberg et al 1986, Extended Data Figure 2c in Biard et al 2016). The central capsule of this family is covered by a skeleton called the inner shell , and this structure appears black in VPR images (Fig.…”

Section: -4 Coelodendridaementioning

confidence: 99%

Optics-based surveys of large unicellular zooplankton: a case study on radiolarians and phaeodarians

Nakamura

Somiya

Suzuki

et al. 2017

Plankton Benthos Res

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Optics-based surveys for large unicellular zooplankton were carried out in five different oceanic areas. New identification criteria, in which radiolarian-like plankton are categorized into nine different groups, are proposed for future optics-based surveys. The autonomous visual plankton recorder (A-VPR) captured 65 images of radiolarians (three orders: Acantharia, Spumellaria and Collodaria) and 117 phaeodarians (four taxa: Aulacanthidae, Phaeosphaerida, Tuscaroridae and Coelodendridae). Colonies were observed for one radiolarian order (Collodaria) and three phaeodarian taxa (Phaeosphaerida, Tuscaroridae and Coelodendridae). The rest of the radiolarian orders (Taxopodia and Nassellaria) and the other phaeodarian taxa were not detected because of their small cell size (< ca. 400 µm).

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The biology of a coelodendrid: a mesopelagic phaeodarian radiolarian

Cited by 22 publications

References 8 publications

Phaeodaria: Diverse Marine Cercozoans of World-Wide Distribution

Phaeodaria: Diverse Marine Cercozoans of World-Wide Distribution

Large virus-like particles from vacuoles of phaeodarian radiolarians and from other marine samples

Optics-based surveys of large unicellular zooplankton: a case study on radiolarians and phaeodarians

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