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What

Life (Life)

Observer

ilsignorvega

Date

June 20, 2024 02:30 PM CEST

Description

inside moss

Euglyphida - Photo (c) william_dembowski, some rights reserved (CC BY-NC), uploaded by william_dembowski
bdstaylor's ID: Order Euglyphida, a member of Kelp, Diatoms, and Allies (Kingdom Chromista)
Added on June 20, 2024
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Observer

tobiashays

Date

September 6, 2022 10:10 AM PDT

Description

From thin film of water over algae covered rock in upper intertidal zone, below freshwater drainage outlet.
The cell has a flagellum that was used to swim. The cell would periodically stop swimming and continue whiping the flagellum. The last two images show this behavior.

Oxyrrhis marina - Photo (c) Vicente Franch Meneu, some rights reserved (CC BY-NC), uploaded by Vicente Franch Meneu
bdstaylor's ID: Oxyrrhis marina, a member of Dinoflagellates (Superclass Dinoflagellata)
Added on June 20, 2024
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Observer

maricel-patino

Date

June 18, 2024 09:52 PM WEST

Description

Found among algae collected from edge of Old Mondego River. The organism has one long appendage.

Peranemidae - Photo (c) Don Loarie, some rights reserved (CC BY)
bdstaylor's ID: Family Peranemidae, a member of Euglenids (Class Euglenida)
Added on June 18, 2024
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Photos / Sounds

Observer

mednyi

Date

June 18, 2024 05:39 PM MSK

Description

Микроскоп

Euglypha acanthophora - Photo (c) Gone But Not Forgotten - R.I.P, some rights reserved (CC BY-NC), uploaded by Gone But Not Forgotten - R.I.P
bdstaylor's ID: Euglypha acanthophora, a member of Kelp, Diatoms, and Allies (Kingdom Chromista)
Added on June 18, 2024
Improving

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Observer

tobysaunders

Date

June 18, 2024 09:04 AM EDT
Lembadion - Photo (c) Proyecto Agua, some rights reserved (CC BY-NC-SA)
bdstaylor's ID: Genus Lembadion, a member of Ciliates (Phylum Ciliophora)
Added on June 18, 2024
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Observer

peptolab

Date

June 17, 2024 11:37 PM EDT

Description

Placus ovum Lipscomb and Riordan 2012 (Spathidiopsis ovum (Kahl, 1926) Corliss, 1979 Thoracophrya ovum Kahl, 1926) from the sulfidic fine sand intertidal benthos of marine estuary Acabonac Harbor at Landing Lane. Compare to Placus striatus. Imaged in Nomarski DIC on Olympus BH2S using SPLan 100 1.25 oil immersion objective plus variable phone camera cropping on Samsung Galaxy S9+. The cell measures 46 um in length. With its striking spiralized s-shaped kineties, it is easy to identify as a member of the family Placidae. Placus is easily differentiated from its sister taxon Spathidiopsis by the absence of the "pseudomembrane" of stiff toxicysts running from the cytostome along with the brosse both terminating at an inpocketing depression filled with toxicysts. Both features are absent in this Placus species. Interestingly, I have just described the other known Placus species, Placus striatus, in the same sample. P. striatus differs from this observation in having both ends rounded without the tapering anterior end seen here. Also, the macronucleus of P. striatus is elongate while the macronucleus of Placus ovum is ovoid as seen here.

Placus ovum is stated by Lipscomb and Riordan to be a freshwater species (1). However, Carey 1992 describes the species under the previous name Spathidiopsis ovum as being found in marine biotopes. Lipscomb and Riordan chronicled the taxonomic confusion between these two genera (see below) and revised the family Placidae making Placus the type genus of the family. They differentiate the two genera thus: "Placus and its sister taxon Spathidiopsis both have spiraling kineties composed of single cilia inserted into the side of the ciliary furrow. Spathidiopsis can be distinguished from Placus because it has a brosse consisting of two kineties (i.e. one composed of paired cilia, the other of single cilia), a row of rod-shaped toxicyst-bearing palps extending around one side of the oral area and along the length of the brosse, and a mid-cell cortical inpocketing containing toxicysts and a segment of the brosse" (1).

In redescribing Placus ovum, Lipscomb and Riordan wrote: "Placus ovum Kahl, 1926 Synonyms. Thoracophrya ovum Kahl, 1926; Spathidiopsis ovum Carey, 1992. Type material. No type material was deposited by Kahl (1926) or any of the subsequent workers. Description. Pyriform cell, tapering toward anterior end and rounded on posterior end. Circular in cross-section, 25–45 um-long (width not reported). Circular apical cytostome. Approximately 16 S-shaped spiraling kineties. Brosse not conspicuous and infraciliature not described. Macronucleus elongated oval. Terminal contractile vacuole. Other descriptions. Kahl 1926, 1930; Carey 1992. Distribution. Free-living in freshwater. Kahl (1926, 1933) described P. ovum from freshwater ditches near Alsterdorf and Oldesloe, Germany. He reported that P. ovum is rare. Remarks. Kahl (1926) originally described this species as a member of his genus Thoracophrya but Kahl (1930) transferred it to the genus Placus when he submerged his genus. The number of kineties is not given in the descriptions by Kahl, but the drawing shows eight kineties on one side. This species is distinguished from P. striatus by its shape and freshwater habitat" (1).

Carey's entry in his atlas of marine interstitial ciliate depicts clearly the tapering anterior end of the cell and writes: "Spathidiopsis ovum (Kahl, 1926) Corliss, 1979 (Fig. 65) Thoracophrya ovum Kahl, 1926. A small species, 25-35 µm long, ovoid or cylindrical. Cytostome oval; dorsal brush not conspicuous; simple ovoid macronucleus. Only the presence of spiralling kineties serves to distinguish this species, at first glance, from members of the genus Prorodon" (2).

"Placus and its sister taxon, Spathidiopsis, are distinct genera, yet have been subjected to a series of misidentifications and nomenclatural mistakes. Cohn (1866) described in the marine tanks of the Berlin aquarium a cylindrical ciliate with distinc tive spiraling kineties, which he placed in a new genus and species, Placus striatus. Because no other species were described by Cohn, the species P. striatus becomes the type by monotypy. Over 20 yr later, Fabre-Domergue (1889) found at Concarneau (Brittany, France) another genus of marine cili ates, which had spiraling kineties and could be distinguished from Placus by its reniform and slightly dorsoventrally flattened shape. He named this new genus and new species Spathidiopsis socialis. Because no other species were described by Fabre-Domergue (1889), the species S. socialis becomes the type by monotypy for the genus Spathidiopsis. Unaware of these descriptions, when Kahl (1926) discovered freshwater representatives of both genera, he created a single genus, Thoracophrya Kahl, 1926; to contain them both. In his descriptions of the ciliates, he noted that both have anterior apical cytostomes and that the reniform species has an inpocketing or Grubchen on its lateral surface and a “Pseudomembrane” (i.e. the row of toxicyst bearing palps adjacent to the brosse) but did not separate them into different genera. Kahl (1926) created another nomenclatural problem by using preoccupied name Spathidiopsis Fabre-Domergue, 1889 for a new genus created for species separated from the genus Spathidium. In subsequent publications, Kahl (1930, 1933) acknowledged the previous work of Cohn (1866) and Fabre-Domergue (1889) and partially corrected his mistakes by synonomizing Thoracophrya with Placus. However, he did not recognize that Spathidiopsis is a distinct genus. Corliss (1960) correctly submerged Kahl’s Spathidiopsis back into Spathidium and, Corliss (1979) resurrected the genus Spathidiopsis Fabre-Domergue, 1889. However, Corliss (1979) did not redefine Spathidiopsis with respect to Placus or establish which species belonged to which genus. Because of the confusing literature, many subsequent authors have misidentified members of one genus as members of the other. Small and Lynn (1985) created a new family, Placidae, for the two genera" (1).

"Song and Wilbert (1989) described a family Placalidae but after the family Placidae had already been created by Small and Lynn (1985). Song and Wilbert (1989) considered the family to be composed of just one genus, Placus, possibly following Kahl’s (1926) classification, which submerged the genus Spathidiopsis into Placus, and incorrectly stated that all members of the family have a mid-cell inpocketing, a feature that is found only in the genus Spathidiopsis. The original family description by Small and Lynn (1985) is inaccurate: describing the brosse as consisting of a single row of paired kinetosomes, which is true of Placus but not Spathidiopsis; and a row of toxicysts adjacent to the brosse but toxicyst-bearing palps are only found adjacent to the brosse of Spathidiopsis but not Placus. Later publications (Lynn 2008; Lynn and Small 2002) repeated some of these mistakes" (1).

Such is the confusion between these two placid genera that Lynn and Small 2002 separated the two genera but actually reversed these features as redescribed by Lipscomb and Riordan and illustrate Spathidiopsis striatus (sic) lacking the pseudomembrane of toxicyst palps and the inpocketing along with Placus luciae (sic) featuring toxicysts in palps beside brosse for its entire length and the ventral depression or fossette into which extend 2 somatic kineties (3)!

  1. The Ultrastructure of Placus striatus and a Revision of the Family Placidae (Ciliophora) DIANA L. LIPSCOMB and GAVIN P. RIORDAN. J. Eukaryot. Microbiol., 59(4), 2012 pp. 407–422
  2. MARINE INTERSTITIAL CILIATES AN ILLUSTRATED KEY PHILIP G. CAREY. Natural History Museum Publications CHAPMAN & HALL London · New York• Tokyo'. · Melbourne· Madras. 1992 pp 43, 224.
  3. Lynn, D. H. & Small, E. B. 2002. Phylum Ciliophora, Doflein, 1901. In: Lee, J. J., Leedale, G. F. & Bradbury, P. C. (ed.), An Illustrated Guide to the Protozoa. Vol. 1 (2000), Society of Protozoologists, Lawrence, Kansas. p. 571-2
Placus ovum - Photo (c) peptolab, some rights reserved (CC BY-NC)
bdstaylor's ID: Placus ovum, a member of Ciliates (Phylum Ciliophora)
Added on June 18, 2024
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Photos / Sounds

Observer

free2fish

Date

June 16, 2024 04:23 PM CDT

Description

L=190 um W=50 um
slightly compressed and retracted
Has the S. minus peristome length (ratio) but also shows a beak similar to S. loxodes

Blepharisma - Photo (c) Proyecto Agua, some rights reserved (CC BY-NC-SA)
bdstaylor's ID: Genus Blepharisma, a member of Ciliates (Phylum Ciliophora)
Added on June 17, 2024
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Observer

spyrusmt

Date

March 15, 2019 03:58 PM EET
Spathidiida - Photo (c) Vicente Franch Meneu, some rights reserved (CC BY-NC), uploaded by Vicente Franch Meneu
bdstaylor's ID: Order Spathidiida, a member of Ciliates (Phylum Ciliophora)
Added on June 17, 2024
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Photos / Sounds

Observer

senecaparkzoo

Date

August 20, 2015

Description

horizontal, sponge-like
All photos copyright David Liittschwager, Natural History Photography. Http://OneCubicFoot.com

Epistylididae - Photo (c) Proyecto Agua, some rights reserved (CC BY-NC-SA)
bdstaylor's ID: Family Epistylididae, a member of Ciliates (Phylum Ciliophora)
Added on June 17, 2024
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Observer

maricel-patino

Date

June 6, 2024 04:44 PM WEST

Description

Fresh water seepage

Cothurnia - Photo (c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille
bdstaylor's ID: Genus Cothurnia, a member of Ciliates (Phylum Ciliophora)
Added on June 16, 2024
Supporting

Photos / Sounds

What

Vampire Amoebae (Family Vampyrellidae)

Observer

maricel-patino

Date

June 6, 2024 04:44 PM WEST

Description

Fresh water seepage

Vampire Amoebae - Photo (c) 
Giuseppe Vago, some rights reserved (CC BY)
bdstaylor's ID: Vampire Amoebae (Family Vampyrellidae)
Added on June 16, 2024
Improving

Photos / Sounds

Observer

cwwood

Date

October 23, 2015
Chilodonellidae - Photo (c) Picturepest, some rights reserved (CC BY)
bdstaylor's ID: Family Chilodonellidae, a member of Ciliates (Phylum Ciliophora)
Added on June 16, 2024
Improving

Photos / Sounds

Observer

em_lamond

Date

September 15, 2020 10:22 PM AWST
Phyllopharyngea - Photo 
Damián H. Zanette, no known copyright restrictions (public domain)
bdstaylor's ID: Class Phyllopharyngea, a member of Ciliates (Phylum Ciliophora)
Added on June 16, 2024
Improving

Photos / Sounds

Observer

calidrisalba1

Date

June 14, 2024 11:50 PM CEST
Arcellinida - Photo (c) Karolina Fucikova, some rights reserved (CC BY-NC), uploaded by Karolina Fucikova
bdstaylor's ID: Order Arcellinida, a member of Lobose Amoebae (Subphylum Lobosa)
Added on June 15, 2024
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Observer

calidrisalba1

Date

June 13, 2024 10:36 PM CEST
Arcellinida - Photo (c) Karolina Fucikova, some rights reserved (CC BY-NC), uploaded by Karolina Fucikova
bdstaylor's ID: Order Arcellinida, a member of Lobose Amoebae (Subphylum Lobosa)
Added on June 14, 2024
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Observer

jordi_mv

Date

October 30, 2022 11:30 AM CET

Description

400X
Eyepiece magnification: 10X
Field Number: 18mm

Water from a small stream full of leaf litter.

Arcella hemisphaerica - Photo (c) Shane Smith, some rights reserved (CC BY-NC), uploaded by Shane Smith
bdstaylor's ID: Arcella hemisphaerica, a member of Lobose Amoebae (Subphylum Lobosa)
Added on June 14, 2024
Improving

Photos / Sounds

Observer

alexparry

Date

June 3, 2024 05:25 PM EDT

Description

Collected from benthic diatom mat in brackish water environment at low tide.

Trachelocercidae - Photo (c) Ashish Aswin Kumar, all rights reserved, uploaded by Ashish Aswin Kumar
bdstaylor's ID: Family Trachelocercidae, a member of Ciliates (Phylum Ciliophora)
Added on June 14, 2024
Improving

Photos / Sounds

Observer

alexparry

Date

June 9, 2024 07:52 PM EDT

Description

Short stalk with lid that appears to be attached near the oral region. Found in a freshwater ditch.

Pyxicola - Photo (c) MikeN, some rights reserved (CC BY-NC), uploaded by MikeN
bdstaylor's ID: Genus Pyxicola, a member of Ciliates (Phylum Ciliophora)
Added on June 14, 2024
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Observer

alexparry

Date

June 3, 2024 05:33 PM EDT

Description

Collected from benthic diatom mat in brackish water environment at low tide.

Condylostoma - Photo (c) James K. Douch, some rights reserved (CC BY-SA), uploaded by James K. Douch
bdstaylor's ID: Genus Condylostoma, a member of Ciliates (Phylum Ciliophora)
Added on June 13, 2024
Improving

Photos / Sounds

Observer

duestin

Date

June 10, 2024 11:57 PM CST
Cyrtolophosis - Photo (c) Shuo Li, some rights reserved (CC BY), uploaded by Shuo Li
bdstaylor's ID: Genus Cyrtolophosis, a member of Ciliates (Phylum Ciliophora)
Added on June 12, 2024
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Observer

calidrisalba1

Date

June 11, 2024 07:52 AM CEST
Arcellinida - Photo (c) Karolina Fucikova, some rights reserved (CC BY-NC), uploaded by Karolina Fucikova
bdstaylor's ID: Order Arcellinida, a member of Lobose Amoebae (Subphylum Lobosa)
Added on June 12, 2024
Improving

Photos / Sounds

Observer

trientalid

Date

June 6, 2024 02:44 PM PDT
Arcellinida - Photo (c) Karolina Fucikova, some rights reserved (CC BY-NC), uploaded by Karolina Fucikova
bdstaylor's ID: Order Arcellinida, a member of Lobose Amoebae (Subphylum Lobosa)
Added on June 12, 2024
Improving

Photos / Sounds

Observer

ilsignorvega

Date

June 12, 2024 10:40 AM CEST

Description

inside moss

Arcellidae - Photo (c) william_dembowski, some rights reserved (CC BY-NC), uploaded by william_dembowski
bdstaylor's ID: Family Arcellidae, a member of Lobose Amoebae (Subphylum Lobosa)
Added on June 12, 2024
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Photos / Sounds

Observer

ilsignorvega

Date

June 11, 2024 02:26 PM CEST

Description

inside moss

Euglypha - Photo (c) william_dembowski, some rights reserved (CC BY-NC), uploaded by william_dembowski
bdstaylor's ID: Genus Euglypha, a member of Kelp, Diatoms, and Allies (Kingdom Chromista)
Added on June 12, 2024
Leading

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Observer

someplant

Date

June 9, 2024 05:08 AM EDT

Description

Magnification of photos: 400×, 600×, 600×, 600×, 400×
Habitat: a gap in an artificial pond, where it leaks into the surrounding grass and dirt.
Photo taken with a Celestron PentaView Digital Microscope. According to their website, the FOV (i.e. the diagonal width) at 400× is 150 µm.

Anthophysa vegetans - Photo (c) Don Loarie, some rights reserved (CC BY), uploaded by Don Loarie
bdstaylor's ID: Anthophysa vegetans, a member of Synurids (Class Synurophyceae)
Added on June 11, 2024
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Observer

someplant

Date

June 9, 2024 06:05 AM EDT

Description

Magnification of all photos: 600×
Habitat: a gap in an artificial pond, where it leaks into the surrounding grass and dirt.
Photo taken with a Celestron PentaView Digital Microscope. According to their website, the FOV (i.e. the diagonal width) at 600× is 100 µm.
Last photo shows a separate specimen which is in the process of dividing.

Cyclidium - Photo (c) Picturepest, some rights reserved (CC BY)
bdstaylor's ID: Genus Cyclidium, a member of Ciliates (Phylum Ciliophora)
Added on June 11, 2024
Leading

Photos / Sounds

Observer

free2fish

Date

June 11, 2024 11:16 AM CDT

Description

L=82 um W=51um. Looked at Foissner. Dorsel surface looks ridged and I think cirrus V/2 is there. Length provides no clue.

Euplotes - Photo (c) Vicente Franch Meneu, some rights reserved (CC BY-NC), uploaded by Vicente Franch Meneu
bdstaylor's ID: Genus Euplotes, a member of Ciliates (Phylum Ciliophora)
Added on June 11, 2024
Improving

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Observer

someplant

Date

June 9, 2024 05:46 AM EDT

Description

Magnification of photos: 400×, 400×, 400×, 400×, 400×, 600×, 600×, 600×, 600×, 400×, 200×
Habitat: a gap in an artificial pond, where it leaks into the surrounding grass and dirt.
Photo taken with a Celestron PentaView Digital Microscope. According to their website, the FOV (i.e. the diagonal width) at 400× is 150 µm.
Video available: https://youtu.be/cJZKk4gCcsM

Aspidisca lynceus - Photo (c) peptolab, some rights reserved (CC BY-NC)
bdstaylor's ID: Aspidisca lynceus, a member of Ciliates (Phylum Ciliophora)
Added on June 11, 2024
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Photos / Sounds

Observer

mc_agricola

Date

June 5, 2024 08:35 PM MSK

Description

Periphyton from an intermediate swamp; pH = 6.5.

Paramecium bursaria - Photo (c) Anatoly Mikhaltsov, some rights reserved (CC BY-SA)
bdstaylor's ID: Complex Paramecium bursaria, a member of Paramecium (Genus Paramecium)
Added on June 11, 2024
Supporting

Photos / Sounds

What

Ciliates (Phylum Ciliophora)

Observer

mc_agricola

Date

June 5, 2024 08:30 PM MSK

Description

Periphyton from an intermediate swamp; pH = 6.5.

Ciliates - Photo (c) Don Loarie, some rights reserved (CC BY), uploaded by Don Loarie
bdstaylor's ID: Ciliates (Phylum Ciliophora)
Added on June 11, 2024
Improving

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