Observations on Ephydatia fluviatilis
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Ephydatia fluviatilis (Linnaeus, 1759)
Most likely ID: n.a.
Basionym: Spongia fluviatilis Linnaeus, 1759
Add’l Synonyms: NM
Sampling date 05/2011. Scale bar indicates 50 µm (3).
Three images. Tiny sponge grown on a microscope slide.
Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!
Place name: Creek in Oder valley 100 km north east of Berlin (Germany)
Latitude: 53.135032 Longitude: 14.348738
Microscope Zeiss Universal, camera Olympus C7070WZ. DOF image.
Scale bars indicate 50 µm (1), 25 µm (2, 4–6), 10 µm (3).
Six images. The coverslip print has disintegrated the sponge, making the amoeboid, totipotent cells visible. Totipotent means embryonic in the sense that each of these cells is capable of developing into a new sponge through successive mitotic divisions. Note that each cell has zoochlorellae!
Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!
Place name: Creek in Oder valley 100 km north east of Berlin (Germany)
Latitude: 53.135032 Longitude: 14.348738
Microscope Zeiss Universal, camera Olympus C7070WZ. DOF image.
Sampling date 03/2021. Scale bars indicate 100 µm (1), 25 µm (2, 3).
Three images.
| First: | Gemmula of Ephydatia fluviatilis. Most freshwater sponges produce gemmulae, globular bodies containing totipotent cells protected by a shell of the biopolymer spongin in order to survive unfavorable living conditions. |
| Second and third: | Close-up of the spongin layer of a gemmula. |
Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!
Place name: Historical Eider Canal Rathmannsdorf (Schleswig-Holstein, Germany)
Latitude: 54.38023557 Longitude: 10.07928818
Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.
Three images. The totipotent sponge cells from two gemmulae have built new tiny sponges.
Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!
Place name: Historical Eider Canal Rathmannsdorf (Schleswig-Holstein, Germany)
Latitude: 54.38023557 Longitude: 10.07928818
Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.
Three images, two in a slide changer.
The juvenile sponges have formed their first outlets for filtered water, oscula.
Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!
Place name: Historical Eider Canal Rathmannsdorf (Schleswig-Holstein, Germany)
Latitude: 54.38023557 Longitude: 10.07928818
Zeiss dissecting microscope SV6, camera Olympus OM-D M5 MKII. DOF images.
© Wolfgang Bettighofer,
images under Creative Commons License V 3.0 (CC BY-NC-SA).
For permission to use of (high resolution) images please contact postmaster@protisten.de.
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New items
discoides
gibba
cassis
elongata
oblonga
bathystoma
capreolata
var. masurica
globulosa
truncata
parva
globularis
fimbriata
chinensis
wailesii
concinnus
filifera
lineare
urceolata
enchelys
oblonga
artocrea
crenulata
spec.
brevicolla
placentula
var. euglypta
bryophila
spiralis
galeata
mitrata
gibbosa
didelta
immanata
acuminata
granulata
mucosa
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rectum
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brevicaulis
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striolatum
teliferum
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