Aeolosoma hemprichi
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Aeolosoma hemprichi |
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| Scientific name | ||||||||||||
| Aeolosoma hemprichi | ||||||||||||
| Ehrenberg , 1828 |
Aeolosoma hemprichi is the name of a very small annelid - Art in the family of Aeolosomatidae that as substrate eaters lives of European, especially at the base of inland waters.
features
Aeolosoma hemprichi becomes about 1 mm to 5 mm long. The head is wider than the segment following it . On each segment there are four bundles of bristles with approximately straight bristles , with longer and shorter bristles on a bundle of bristles. The colored glands located in the epidermis contain an orange-red to dark purple-colored liquid. The upper pharyngeal ganglion is deeply divided into two at the rear. Starting with the first bristle-bearing segment, each segment contains a pair of nephridia . The pulsating back vessel of the blood vessel system located in the front section of the animal does not merge into a sinus behind the esophagus, but into a network of capillaries that supply the midgut.
The 4 to 14 segments function as zooids , which are formed by fragmentation (paratomy) and are used for asexual reproduction .
Occurrence and distribution
Aeolosoma hemprichi lives at the bottom of inland waterways, including peat bogs and wells, but also in brackish water areas , especially in detritus-rich sand (interstitial). It is common in England , continental Europe, and North Africa.
Life cycle
Aeolosoma hemprichi is a hermaphrodite and can also reproduce sexually. However, it mainly reproduces asexually . If an individual reaches a number of 14 segments, several zooids separate from the mother animal within a few days and thus form a clone. Each detached segment grows into a completely new animal.
nutrition
Aeolosoma hemprichi feeds on microscopic algae and other microorganisms that live on the substrate and are sucked in with the aid of the muscular pharynx . The algae are digested in the intestine and the mineral components are excreted undigested.
Initial description
Aeolosoma hemprichi was first described by Christian Gottfried Ehrenberg in 1828 . He named the species after the Silesian zoologist Friedrich Wilhelm Hemprich , who died shortly before at the age of 29 . The generic name means "nimble body" ( ancient Greek αἰόλος aiólos "nimble", σῶμα sō̂ma "body").
literature
- Frank Evers Beddard: A Monograph of the Order of Oligochaeta . Oxford at the Clarendon Press, 1895. p. 183, Aeolosoma hemprichi, Ehrenberg.
- Jacob van der Land: Family Aeolosomatidae. In: Ralph O. Brinkhurst, Barrie GM Jamieson (1988): Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh 1971, pp. 665-706.
- Pierre Lasserre: Clitellata - Aeolosomatidae. In: Arthur Giese, John S. Pearse (Eds.): Reproduction of Marine Invertebrates V3: Annelids and Echiurans. Academic Press, New York 1975. pp. 222f.
- Aeolosoma hemprichi. In: Christian Gottfried Ehrenberg: Phytozoa turbellaria Africana et Asiatica in phytozoorum tabula IV et V delineata. In: Friedrich Wilhelm Hemprich, Christian Gottfried Ehrenberg (eds.): Symbolae physicae, seu icones et descriptiones corporum naturalium novorum aut minus cognitorum quae ex itineribus per Libyam, Aegyptium, Nubiam, Dongalam, Syriam Arabiam et Habessiniam. Zoologica II, Animalia evertebrata exclusis insectis. Officina Academica, Berlin 1828. Fig. IV, V.
Web links
- Aeolosomatidae in: Lexicon of Biology , online edition.