Observations on Hydra viridissima
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Hydra viridissima Pallas, 1766
Most likely ID: n.a.
Basionym: n.a.
Add’l Synonyms: NM
Scale bars indicate 1 mm (1), 250 µm (2, 3, 5), 100 µm (4).
Five images.
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: Tropical freshwater aquarium
Latitude: 54.3018013 Longitude: 10.07120132
a) Olympus stereo microscope SZX16/Planapo 2.0x, camera Olympus OM-D M5 MKII. Some DOF images.
b) Fifth image:
Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF image.
Scale bars indicate 250 µm (1, 2), 25 µm (3-6), 10 µm (7, 8).
Four image couples, some with and without marking arrows.
| First couple: | Penetrant nematocysts (arrow), ejected sticky thread of a gultinant ptychocyst (double headed arrow). |
| Second couple: | Optical cross section through a tentacle. |
| Third couple: | The optical cross section through the body shows all three types of their cnidae: some penetrant nematocysts (arrow) showing shaft and coiled hollow tubule for transportation of the toxin into the prey, some more volvent spirocyst (arrowhead) and one glutinous ptychocysts (double headed arrow). |
| Fourth couple: | Nucleus of a zoochlorella (arrow), glutinous ptychocyst for attaching the animal to a surface (double headed arrow). |
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: Tropical freshwater aquarium
Latitude: 54.3018013 Longitude: 10.07120132
Microscope Zeiss Axioplan, 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
var. laevicincta
rectum
bacillifera
brevicaulis
nasutum
striolatum
teliferum
pseudopyramidatum