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These nematodes (eelworms, roundworms, trichinae) are among the most diverse and individualised group of animals in the world with 20,000 different species. Most of them are very small, ranging from 0.1 to around one millimetre (the largest species, measuring over 8 metres, lives in the placenta of sperm whales). In contrast to more highly developed arthropods (such as earthworms), they have no blood vessels. There are usually males and egg-laying females, but in some cases there is also asexual virgin reproduction (pathenogesis). Four larval moultings take place until sexual maturity.

Nematoden - Wurm

They feed through a hollow oral spine that moves rhythmically while sucking. They live in the soil and also feed on bacteria or fungi, which is a positive element in the ecological system of a vineyard soil. 1 = mouth opening, 2 = intestine, 3 = cloaca, 4 = excretory organ, 5 = testis.

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Markus J. Eser

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Markus J. Eser
Weinakademiker und Herausgeber „Der Weinkalender“

The world's largest Lexicon of wine terms.

26,403 Keywords · 47,035 Synonyms · 5,323 Translations · 31,737 Pronunciations · 205,287 Cross-references
made with by our author Norbert F. J. Tischelmayer. About the Lexicon