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Lumi Haraguchi, Hans H. Jakobsen, Nina Lundholm and Jacob Carstensen
Wikimedia Commons
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Summary.mw-parser-output table.commons-file-information-table,.mw-parser-output.fileinfotpl-type-information{border:1px solid #a2a9b1;background-color:#f8f9fa;padding:5px;font-size:95%;border-spacing:2px;box-sizing:border-box;margin:0;width:100%}.mw-parser-output table.commons-file-information-table>tbody>tr,.mw-parser-output.fileinfotpl-type-information>tbody>tr{vertical-align:top}.mw-parser-output table.commons-file-information-table>tbody>tr>td,.mw-parser-output table.commons-file-information-table>tbody>tr>th,.mw-parser-output.fileinfotpl-type-information>tbody>tr>td,.mw-parser-output.fileinfotpl-type-information>tbody>tr>th{padding:4px}.mw-parser-output.fileinfo-paramfield{background:#ccf;text-align:right;padding-right:0.4em;width:15%;font-weight:bold}.mw-parser-output.commons-file-information-table+table.commons-file-information-table,.mw-parser-output.commons-file-information-table+div.commons-file-information-table>table{border-top:0;padding-top:0;margin-top:-8px}@media only screen and (max-width:719px){.mw-parser-output table.commons-file-information-table,.mw-parser-output.commons-file-information-table.fileinfotpl-type-information{border-spacing:0;padding:0;word-break:break-word;width:100%!important}.mw-parser-output.commons-file-information-table>tbody,.mw-parser-output.fileinfotpl-type-information>tbody{display:block}.mw-parser-output.commons-file-information-table>tbody>tr>td,.mw-parser-output.commons-file-information-table>tbody>tr>th,.mw-parser-output.fileinfotpl-type-information>tbody>tr>td,.mw-parser-output.fileinfotpl-type-information>tbody>tr>th{padding:0.2em 0.4em;text-align:left;text-align:start}.mw-parser-output.commons-file-information-table>tbody>tr,.mw-parser-output.fileinfotpl-type-information>tbody>tr{display:flex;flex-direction:column}.mw-parser-output.commons-file-information-table+table.commons-file-information-table,.mw-parser-output.commons-file-information-table+div.commons-file-information-table>table{margin-top:-1px}.mw-parser-output.fileinfo-paramfield{box-sizing:border-box;flex:1 0 100%;width:100%}} Description: English: Didinium nasutum, from V. Schewiakoff, Organizatsïia i sistematika Infusoria aspirotricha (Holotricha auctorum), 1896 Français : Didinium nasutum d'après V. Schewiakoff, Organizatsïia i sistematika Infusoria aspirotricha (Holotricha auctorum), vol. IV, n°1, 1896 Légendes (
source ici) : a. pore anal (trou excréteur) ; o. orifice buccal (bouche) ; cV. Vacuole contractile ; ek. ectoplasme ; st. cône buccal dilaté ; M. deux couronnes ciliaires ; N. macroNuleus. Date: 3 September 2012. Source: Organizatsïia i sistematika Infusoria aspirotricha (Holotricha auctorum), 1896 :
voir en ligne. Author:
V. Schewiakoff.
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Longitude (deg): -0.1. Latitude (deg): 50.8. Longitude (deg/min): 0° 10' W. Latitude (deg/min): 50° 50' N. Vice county name: East Sussex. Vice county no.: 14. Country: England. Identified by: Malcolm Storey. Comment: in dew pond. Category: standard photograph or close-up. Photographic equipment used: "35mm transparencies (on a variety of films, but Agfa CT18 in the 1960's to early 1980's followed by Fujichrome in the late 1980's.) Transparencies scanned with Minolta Dimage Scan Dual II AF-2820U transparency scanner.".
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Ventral infraciliature of the haptorid ciliate, Monodinium balbianii (Fabre-Domergue, 1888). The dorsal side is distinguished by the five parallel rows of clavate (club-shaped) cilia (the dorsal brush) just posterior to the anterior wreath of ciliated basal bodies. The longitudinal files of somatic kinetosomes (seen here) are unciliated except for the dorsal brush (not seen in this ventral view) and the obliquely inclined closely spaced ciliated basal bodies that form the ciliary girdle. Darkly stained extrusomes are visible here. Collected from a freshwater pond near Boise, Idaho March 2005. Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991). Brightfield.
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Dorsal infraciliature of the haptorid ciliate, Monodinium balbianii (FABRE-DOMERGUE, 1888). The dorsal side is distinguished by the five parallel rows of clavate (club-shaped) cilia (the dorsal brush) just posterior to the anterior wreath of ciliated basal bodies. The longitudinal files of somatic kinetosomes (not seen well here) are unciliated except for the dorsal brush and the obliquely inclined closely spaced ciliated basal bodies that form the ciliary girdle. Darkly stained extrusomes are visible here. Collected from a freshwater pond near Boise, Idaho March 2005. Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991). Brightfield.
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Portrait of the haptorid ciliate, Monodinium balbianii (FABRE-DOMERGUE,1888). The body is a stout cup shape, sometimes more narrowly rounded posteriorly. The oral aperture is at the end of a prominent cone-shaped proboscis that protrudes from the center of the truncate anterior end. The proboscis contains many long toxicysts. There are 50-100 rows of basal bodies but only a narrow circumferential band of these forms the single anterior ciliary girdle. The midbody macronucleus is horseshoe-shaped (as seen in section here) or reniform. There is a single spherical micronucleus (not seen here). The contractile vacuole is posterior. Swims very rapidly, rotating on long axis. Feeds on small flagellates and other ciliates. Collected from organically enriched freshwater pond near Boise, Idaho in September 2003. DIC optics.
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Portrait of Monodinium balbianii (FABRE-DOMERGUE,1888) in mid-division. Dividers are easily confused with Didinium species but may be distinguished by the furrow associated with the ciliary girdle of the opisthe (posterior daughter cell). Stomatogenesis is telokinetal (i.e. new oral ciliature develops from anterior ciliary rows of opisthe). Collected from organically enriched freshwater pond near Boise, Idaho in September 2003. DIC optics.
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Dorsal infraciliature of the haptorid ciliate, Monodinium balbianii (FABRE-DOMERGUE, 1888). The dorsal side is distinguished by the five parallel rows of clavate (club-shaped) cilia (the dorsal brush) just posterior to the anterior wreath of ciliated basal bodies. The longitudinal files of somatic kinetosomes (not seen well here) are unciliated except for the dorsal brush and the obliquely inclined closely spaced ciliated basal bodies that form the ciliary girdle. Darkly stained extrusomes are visible here. Collected from a freshwater pond near Boise, Idaho March 2005. Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991). Brightfield.
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Infraciliature of a middle divider of Monodinium balbianii (FABRE_DOMERGUE,1888). The ciliary girdles of the opisthe and proter are visible here. Densely stained extrusomes are also visible.Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991). Brightfield.
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Originally described by Schewiakoff under the name Didinium balbianii. An individual with weakly projecting mouth cone, traveling backwards. a--Anus cv--Contractile vacuole ek--Ectoplasm N--Macronucleus ncl--Micronucleus o--Mouth st--Cytopharyngeal basket W--Ciliated ring z -- Zoochlorellae
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Originally described by Schewiakoff under the name Didinium balbianii. Shown traveling forward, with mouth cone extended. a--Anus cv--contractile vacuole ek--Ectoplasm N--Macronucleus nk--Food particle o--Mouth st--Cytopharyngeal basket W--Ciliated ring
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Originally described by Schewiakoff under the name Didinium balbianii. Schewiakoff describes this as an individual apprehended in division. o--Mouth N--Macronucleus W--Ciliated ring W1--New ciliated ring, prepared for offspring
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Originally described by Schewiakoff under the name Didinium balbianii. The ""rear offspring"" (i.e. opisthe) of a recent division. cv--Contractile vacuole N--Macronucleus ncl--Micronucleus o--Mouth W--Ciliated ring
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Portrait of Didinium nasutum, a barrel-shape haptorid ciliate with a conical anterior snout containing prominent extrusomes. Two ciliary girdles. Oral aperture forms anteriorly at the apex of the snout. Two ciliary girdles, one circumoral and the other equatorial . Posterior contractile vacuole. Macronucleus C-shaped or oblong. Fast swimmer. Fixes prey (often Paramecium or Frontonia) with nontoxic extrusomes called pexicysts and kills them with toxicysts before engulfing them whole through enormously extensible oral aperture.Didinium may be confused with early dividing individuals of Monodinium. From freshwater pond with abundant Frontonia near Boise, Idaho.
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Didinium (die-din-ee-um) nasutum is an oval ciliate ranging in size from 80 microns to 200 microns, but is usually 120 - 150 microns long. This ciliate lives in freshwater habitats and is frequently seen in pond samples. It has two conspicuous bands or girdles of cilia (pectinellae); one round the front pointed end and one band just below the middle of the cell. The oral dome at the anterior end extends as a snout or nose. This feature gives it its species name, 'nasutum' - meaning 'nose'. Didinium can easily be confused with dividing cells of a similar genus with only one anterior girdle but formed a second girdle in the mid-body during cell division. This is a slightly squashed specimen. The lateral view shows the two ciliary girdles and the oral dome equipped with hundreds of extrusomes. The cell is 126 X 108 microns. Differential interference contrast.
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Didinium (die-din-ee-um) nasutum is an oval ciliate ranging in size from 80 microns to 200 microns, but is usually 120 - 150 microns long. This ciliate lives in freshwater habitats and is frequently seen in pond samples. It has two conspicuous bands or girdles of cilia (pectinellae); one round the front pointed end and one band just below the middle of the cell. The oral dome at the anterior end extends as a snout or nose. This feature gives it its species name, 'nasutum' - meaning 'nose'. Didinium can easily be confused with dividing cells of a similar genus with only one anterior girdle but formed a second girdle in the mid-body during cell division. This slightly squashed specimen was collected in the plankton from Lake Constance, Germany. The image is in focus on the two ciliary girdles. Cell - 126 X 108 ¦m. Differential interference contrast.
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Portrait of Didinium nasutum (Mueller,1773) Stein, 1859, a barrel-shape haptorid ciliate with a conical anterior snout containing prominent extrusomes (seen well in this image). Two ciliary girdles. Oral aperture forms anteriorly at the apex of the snout. Two ciliary girdles, one circumoral and the other equatorial (not well-seen in this image). Posterior contractile vacuole. Macronucleus C-shaped or oblong. Fast swimmer. Fixes prey (often Paramecium or Frontonia) with nontoxic extrusomes called pexicysts and kills them with toxicysts before engulfing them whole through enormously extensible oral aperture.Didinium may be confused with early dividing individuals of Monodinium. From freshwater pond with abundant Frontonia near Boise, Idaho. DIC.
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A somewhat compressed but living individual of this ciliate. Only the anterior of the two bands of cilia are evident. the extrusomes in the anterior mouth are used to capture prey.
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A view of the cytopharynx but in a dividing Didinium. This cytopharynx is in the proter (anterior) daughter cell. The lamellae, each consisting of a set of perpendicularly arranged microtubules (mt), cover this food-vacuole forming region. Vesicles (ves) lie near the cytopharyngeal membrane and fuse with the membrane (arrows). EM taken on 5/20/69 by R. Allen with Philips 300 TEM. Neg. 6,370X. Bar = 1 micron.
This image is available in Richard Allen's collection.
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Portrait of Monodinium. Haptorid ciliate with single circumferential ring of cilia anteriorly. Prominent proboscis with extrusomes. Contractile vacuole posterior. Swims very rapidly rotating on long axis. From freshwater pond near Boise, Idaho. Brightfield.
