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Tree of Life Media Contributed By Sonja I. Rueckert

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ID Thumbnail Media Data
30871
Specimen Condition Live Specimen
Life Cycle Stage Trophozoites
Copyright ©
Image Use restricted
Attached to Group Gregarina: view page image collection
Title gregarine_lmcopy.jpg
Image Content Specimen(s)
ID 30871
30872
Specimen Condition Live Specimen
Copyright ©
Image Use restricted
Attached to Group Gregarina: view page image collection
Title hosts.jpg
ID 30872
30873
Comments Illustration of the general life cycle of gregarines
Reference modified after Vivier, E. and I. Desportes. 1990. Apicomplexa. In: Margulis, L., J.O. Corliss, M. Melkonian, and D.J. Chapman, eds. 1990. Handbook of the Protoctista; the structure, cultivation, habits and life histories of the eukaryotic microorganisms and their descendants exclusive of animals, plants and fungi. Jones and Bartlett Publishers. Boston. pp. 549-573.
Copyright ©
Image Use restricted
Attached to Group Gregarina: view page image collection
Title general_lifecycle01copy.jpg
Image Type Diagram
ID 30873
30874
Scientific Name Monocystis agilis
Comments An illustration of the Monocystis life cycle. The infection starts with the earthworm ingesting an oocyst (1, 2) that releases sporozoites (3, 4) within the intestines (green). The sporozoite is motile and penetrates the intestinal wall (5) and enters the dorsal blood vessel (6). The sporozoite enters the seminal vesicles (yellow) via the (dark red) dorsoventral hearts (7). The sporozoites feed on the developing spermatocytes (8) in the wall of the seminal vesicle. The gregarines then move into the lumen of the vesicle where they mature into trophozoites. Each ball of sperm within the seminal vesicle contains a young trophozoite (9). These trophozoites are covered by remnants of the sperm cells and often superficially take on the appearance of a ciliated eukaryotic cell. After consuming the sperm ball, the now mature trophozoites pair up in syzygy (10). The trophozoites develop into gamonts, and a gametocyst wall forms around each pair (11). Each of the two gamonts undergoes multiple nuclear divisions to produce many nuclei developing into gametes. Two gametes each fuse and form zygotes, which are surrounded by oocyst walls (12). Within this oocyst, the diploid zygote undergoes meiosis and then mitosis to produce eight haploid daughter cells by a process known as sporogony. The gametocysts, or oocysts if they have been released, leave the earthworm through the male genital pore and are liberated into the soil (13, 14). Infection of a new host occurs by oral ingestion of an oocyst (or perhaps through the process of mutual cross fertilization during host sexual reproduction).
Reference modified after Olsen, O.W. 1974. Animal parasites: Their life cycles and ecology. Dover Publications, Inc., New York.
Copyright ©
Image Use restricted
Attached to Group Monocystids (Gregarina): view page image collection
Title monocystis_lifecycle_newcopy.jpg
Image Type Drawing/Painting
ID 30874
30933
Copyright ©
Image Use restricted
Attached to Group Gregarina: view page image collection
Title gregarine_sem2.jpg
ID 30933
31003
Scientific Name Selenidium terebellae
Specimen Condition Live Specimen
Life Cycle Stage Trophozoite
Movie Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © Brian S. Leander
Attached to Group Selenidium and relatives (Gregarina): view page movie collection
Title Selenidium terebellae movement
Description The movie shows the nematode-like bending, coiling and twisting movements of Selenidium terebellae from the intestines of a spaghetti worm, Thelepus.
Movie Type Documentary
Movie Content Specimen(s)
ID 31003
31004
Scientific Name Lecudina sp.
Specimen Condition Live Specimen
Life Cycle Stage Trophozoite
Movie Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © Brian S. Leander
Attached to Group Lecudinidae (Gregarina): view page movie collection
Title Lecudina sp. gliding
Description The movie shows the gliding motility of Lecudina sp. from the intestines of the pile worm Nereis.
Movie Type Documentary
Movie Content Specimen(s)
ID 31004
31005
Scientific Name Pterospora schizosoma
Specimen Condition Live Specimen
Life Cycle Stage Trophozoite
Movie Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © Brian S. Leander
Attached to Group Urosporidae (Gregarina): view page movie collection
Title Pterospora schizosoma dynamic peristalsis-like movements
Description The movie shows the dynamic peristalsis-like movements of two attached trophozoites of Pterospora schizosoma, a urosporidian from the coelom of a bamboo worm, Axiothella.
Movie Type Documentary
Movie Content Specimen(s)
ID 31005
31006
Scientific Name Selenidium vivax
Specimen Condition Live Specimen
Life Cycle Stage Trophozoite
Movie Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © Brian S. Leander
Attached to Group Selenidium and relatives (Gregarina): view page movie collection
Title Selenidium vivax movement
Description The movie shows the bending and twisting movements of Selenidium vivax from the intestines of a peanut worm, Phascolosoma.
Movie Type Documentary
Movie Content Specimen(s)
ID 31006
31007
Scientific Name Selenidium vivax
Specimen Condition Live Specimen
Life Cycle Stage Trophozoite
Movie Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © Brian S. Leander
Attached to Group Selenidium and relatives (Gregarina): view page movie collection
Title Selenidium vivax dynamic peristalsis-like movements
Description The movie shows bending movements and peristaltic waves passing from the posterior end the anterior end of the cell of Selenidium vivax from the intestines of a peanut worm, Phascolosoma. The flattened cell shape of the trophozoite and the active motility appear to be quite similar to that of detached proglottids of cestode flatworms.
Movie Type Documentary
Movie Content Specimen(s)
ID 31007
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