A manual of the Infusoria: including a description of all known flagellate, ciliate, and tentaculiferous Protozoa, British and foreign, and an account of the organization and affinities of the sponges

Kent, William Saville; Kent, W. Saville; Priestley, James T.

doi:10.5962/bhl.title.20943

Cited by 69 publications

(41 citation statements)

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“…Just like our nearest non-animal relatives, choanoflagellates, sponges are universally aquatic, and virtually universally bacterivorous [27][28][29] (but see [30] for an interesting exception). As already noted in the 19th century, sponge cells responsible for capture of food particles -the choanocytes -are strikingly similar in both morphology and function to the choanoflagellates themselves [13,31,32] (Figure 1a). Both of these cell types are characterized by presence of a single motile flagellum (which generates water movement) surrounded by a collar of microvilli (the major site of capture and engulfment of food particles).…”

Section: The Morphological Perspectivementioning

confidence: 78%

Sponges as models to study emergence of complex animals

Adamska

2016

Current Opinion in Genetics & Development

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Section: The Morphological Perspectivementioning

confidence: 78%

Sponges as models to study emergence of complex animals

Adamska

2016

Current Opinion in Genetics & Development

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“…O. Halofolliculina elegans (from Hadži ). P, Q. Diafolliculina thomseni (U, from Hadži ; V, redrawn after Kent ). R. Diafolliculina similis (from Hadži ).…”

Section: Resultsmentioning

confidence: 99%

The Taxonomy and Phylogeny of the Poorly known Heterotrich Ciliate Ampullofolliculina lageniformis Hadži, 1951 (Ciliophora: Heterotrichea)

Luo

et al. 2019

J Eukaryotic Microbiology

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Ampullofolliculina Hadži, 1951 is a monotypic genus, the only species being A. lageniformis which was first discovered in estuarine habitats in the U.S. and has never been redescribed. In the present study, we investigated the taxonomy and phylogeny of A. lageniformis Hadži, 1951 based on analyses of a population collected from a brackish wetland in Ningbo, China. The main characteristics of this species are as follows: trophont about 450–700 μm long in vivo with two short, rounded peristomial lobes of equal size; lorica flask‐shaped, transparent and smooth with a short, wide neck at the base of which two transparent valves are asymmetrically inserted; cortex with brownish to reddish cortical granules and greenish pigment granules; about 80 somatic kineties evenly arranged; moniliform macronucleus with 4–8 ellipsoidal nodules; swarmer dark green, vermiform in shape, about 200–350 μm long in vivo, with about 60 adoral membranelles and 85 somatic kineties, no mouth nor paroral membrane. Phylogenetic analyses inferred from SSU rDNA sequences show that A. lageniformis is closely related to Folliculina and Eufolliculina which nest within a large clade that comprises five families, i.e. Stentoridae, Blepharismidae, Fabreidae, Maristentoridae, and Folliculinidae.

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“…While the life cycles of all choanoflagellates feature a prominent single-celled phase, many species are also capable of forming colonies of morphologically similar cells [8–10]. Phylogenetics and the reconstruction of ancestral character states within the choanoflagellate group indicate that colony formation either evolved before the diversification of two of the three major choanoflagellate clades, or that it evolved multiple times independently [6].…”

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Multicellular development in a choanoflagellate

2010

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Little is known about how the first animals evolved from their single celled ancestors. Over 120 years ago, Haeckel proposed that animals evolved through "repeated self-division of [a] primary cell,"[1] an idea supported by the observation that all animals develop from a single cell (the zygote) through successive rounds of cell division [2]. Nonetheless, there are multiple alternative hypotheses [3], including the formal possibility that multicellularity in the progenitor of animals occurred through cell aggregation, with embryogenesis by cell division being secondarily derived. The closest known relatives of animals, choanoflagellates, are emerging as a model system for testing specific hypotheses about animal origins [4–7]. Studying colony formation in choanoflagellates may provide a context for reconstructing the evolution of animal multicellularity. We find that the transition from single cells to multicelled colonies in the choanoflagellate Salpingoeca rosetta occurs by cell division, with sister cells remaining stably attached.

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A manual of the Infusoria: including a description of all known flagellate, ciliate, and tentaculiferous Protozoa, British and foreign, and an account of the organization and affinities of the sponges

Cited by 69 publications

References 0 publications

Sponges as models to study emergence of complex animals

Sponges as models to study emergence of complex animals

The Taxonomy and Phylogeny of the Poorly known Heterotrich Ciliate Ampullofolliculina lageniformis Hadži, 1951 (Ciliophora: Heterotrichea)

Multicellular development in a choanoflagellate

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