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Laboratory observations on asexual reproduction (Schizogony) and ontogeny of Ammonia tepida with comments on the life cycle

V. Stouff, M. Lesourd and J. P. Debenay
Laboratory observations on asexual reproduction (Schizogony) and ontogeny of Ammonia tepida with comments on the life cycle
Journal of Foraminiferal Research (January 1999) 29 (1): 75-84

Abstract

The production of several successive generations of megalospheric schizonts, alternating with phases of sexual reproduction, was observed in laboratory cultures of Ammonia tepida. The isolation of megalospheric schizonts facilitated observations on the formation of reproductive cysts and the nearly total decalcification of the parental test during schizogony. These studies also follow the ontogenic development of the test in individuals produced by schizogony. Irregularities during development of the early stages lead to adults with characteristic malformations. This study brings new materials for a better understanding of the trimorphic cycle of Ammonia tepida.


ISSN: 0096-1191
EISSN: 1943-264X
Coden: JFARAH
Serial Title: Journal of Foraminiferal Research
Serial Volume: 29
Serial Issue: 1
Title: Laboratory observations on asexual reproduction (Schizogony) and ontogeny of Ammonia tepida with comments on the life cycle
Affiliation: Universite d'Angers, Laboratoire de Geologie, Angers, France
Pages: 75-84
Published: 199901
Text Language: English
Publisher: Cushman Foundation for Foraminiferal Research, Ithaca, NY, United States
References: 40
Accession Number: 2007-059404
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 plate
N46°52'60" - N47°07'60", W02°12'00" - W01°58'00"
Secondary Affiliation: Centre National de la Recherche Scientifique, FRA, France
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200715
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