Results 131 to 140 of about 1,672 (177)
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Hermaphroditism in tardigrades
International Journal of Invertebrate Reproduction, 1979Evidence is presented to show the existence of hermaphroditism in tardigrades, a phenomenon hitherto unknown for this phylum: specimens were obtained containing male and female germ cells in maturation in the same gonad. Hermaphroditic animals have been found in a few species of Isohypsibius; in many species of other genera and also of Isohypsibius ...
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Wasafiri, 2021
Some of these microscopic invertebrates shrug off temperaturesof minus 272 Celsius, one degree warmer than absolute zero.Other species can endure powerful radiation and the vacuum of space.In 2007,...
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Some of these microscopic invertebrates shrug off temperaturesof minus 272 Celsius, one degree warmer than absolute zero.Other species can endure powerful radiation and the vacuum of space.In 2007,...
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Tardigrades are one of the toughest creatures in nature! These tiny little animals, nicknamed ‘moss piglets’ or ‘water bears’, have incredible survival superpowers. They’ve been found in astonishing places, from the top of a mountain to the bottom of an ocean. They’ve even survived a trip into space!
Anne Morgan, Jennifer Falkner
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Anne Morgan, Jennifer Falkner
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Comments on the eyes of tardigrades
Arthropod Structure & Development, 2007A survey is given on the scarce information on the visual organs (eyes or ocelli) of Tardigrada. Many Eutardigrada and some Arthrotardigrada, namely the Echiniscidae, possess inverse pigment-cup ocelli, which are located in the outer lobe of the brain, and probably are of cerebral origin.
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Patterning on Living Tardigrades
Nano LettersMicro/nanofabrication techniques have revolutionized modern photonics and electronics. However, conventional methods remain incompatible with living organisms due to inherent constraints including nonconformal coating, radiation damage, and toxic solvent requirements.
Zhirong Yang +4 more
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American Midland Naturalist, 1978
No tardigrades were reported from Oklahoma prior to the study, and very little was known concerning the tardigrade fauna of the surrounding states. Of 16 species found, two (Pseudechiniscus cor- nutus lobatus and Macrobiotus hibiscus) had not been previously re- ported from North America.
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No tardigrades were reported from Oklahoma prior to the study, and very little was known concerning the tardigrade fauna of the surrounding states. Of 16 species found, two (Pseudechiniscus cor- nutus lobatus and Macrobiotus hibiscus) had not been previously re- ported from North America.
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2018
The list of tardigrade taxa up to a sub-generic level, with the type species of each genus and the numbers of lower taxa in each taxon (known in the end of June 2018) is here presented together with the main environments in which taxa were found. Each listed taxon is characterized by characters common to all lower taxa using predominantly most recent ...
Degma, Peter, Guidetti, Roberto
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The list of tardigrade taxa up to a sub-generic level, with the type species of each genus and the numbers of lower taxa in each taxon (known in the end of June 2018) is here presented together with the main environments in which taxa were found. Each listed taxon is characterized by characters common to all lower taxa using predominantly most recent ...
Degma, Peter, Guidetti, Roberto
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New cases of hermaphroditism in tardigrades
International Journal of Invertebrate Reproduction and Development, 1986Summary Hermaphroditism has been thought to be limited to a narrow circle of species of a single genus. With the new or confirmed cases referred to in this paper, hemaphroditism is now known in four of the five families of eutardigrades, whereas it is unknown for heterotardigrades and particularly for marine species, from which eutardigrades presumably
BERTOLANI, Roberto +1 more
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Anhydrobiosis in tardigrades—The last decade
Journal of Insect Physiology, 2011The current state of knowledge about anhydrobiosis in tardigrades is presented. In response to adverse environmental conditions tardigrades arrest their metabolic activity and after complete dehydration enter the so-called "tun" state. In this ametabolic state they are able to tolerate exposure to various chemical and physical extremes.
Weronika, Wełnicz +4 more
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1975
Eucoelomata in which:- 1. The body is not clearly differentiated into regions, although there is some evidence of metamerism. 2. There is no definite head. 3. The gut is straight and the anus is terminal. 4. The nervous system consists of pre-oral ganglia joined by circum-oesophageal commissures to a double ...
J. E. Webb, J. A. Wallwork, J. H. Elgood
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Eucoelomata in which:- 1. The body is not clearly differentiated into regions, although there is some evidence of metamerism. 2. There is no definite head. 3. The gut is straight and the anus is terminal. 4. The nervous system consists of pre-oral ganglia joined by circum-oesophageal commissures to a double ...
J. E. Webb, J. A. Wallwork, J. H. Elgood
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