Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-06T08:05:09.111Z Has data issue: false hasContentIssue false

On the Occurrence of a Supplementary Chromatic Body in Maupasella nova Cépède (Ciliata astoma), an Intestinal Parasite of Earth-worms (Allolobophora caliginosa Savigny)

Published online by Cambridge University Press:  06 April 2009

D. Keilin
Affiliation:
(From the Quick Laboratory, University of Cambridge.)

Extract

Maupasella nova Cépède was discovered by Maupas (1877) in the alimentary canal of an Algerian earth-worm and subsequently described by Cépède (1910). As was well remarked by the latter author, this ciliate varies much in size and in form, long specimens measuring 80–95 by 25μ., and short ones only 50–75 by 27–47μ. The essential characters of Maupasella are: (1) the presence of an anterior fixing apparatus in the form of a conical process derived from thickened ectoplasm, (2) an elongated ribbon-like macronucleus, (3) irregularly disposed contractile vacuoles, and (4) dense ciliation. Moreover, the micronucleus (PI. VI, fig. 18 and m in all the other figures), which is often difficult to see, is spindle-shaped, with its axis parallel to that of the ciliate's body, strangulated in the middle and with the chromatin condensed into a disc lying in the strangulated portion of the spindle.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1920

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Cépède, C. (1910). Recherches sur les Infusoires Astomes. Anatomie, Biologie, Ethologie parasitaire, Systématique. Arch. de Zool. Expér. el Génér. 5e série, iii. 341609, pls. ix-xvii.Google Scholar
Léger, L. et Duboscq, O. (1904). Notes sur les Infusoires endoparasites. II, Anoplophrya brasili Léger et Duboscq, parasite d'Audcminia tenlaculata. Arch. de Zool. Expér. et Génér. 4e série, ii. 337343.Google Scholar
Möbius, (1888). Bruchstücke einer Infusorienfauna der Kieler Bucht. Arch. für Naturgesch. liv. 81116.Google Scholar
Schneider, A. (1892). Dimorphisme nucléaire dans le genre Hoplitophrya. Tableltes Zoologiques, ii. 211212, Pl. XXXIV.Google Scholar