Morphology, Habits and Reproduction of Diplosoma migrans (Ascidiacea)

Video in TIB AV-Portal: Morphology, Habits and Reproduction of Diplosoma migrans (Ascidiacea)

Formal Metadata

Morphology, Habits and Reproduction of Diplosoma migrans (Ascidiacea)
Alternative Title
Morphologie, Lebensweise und Fortpflanzung von Diplosoma migrans (Ascidiacea)
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IWF Signature
C 1855
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Other Version(s) German
IWF (Göttingen)
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Technical Metadata

IWF Technical Data
Film, 16 mm, LT, 191 m ; F, 17 1/2 min

Content Metadata

Subject Area
Colonies attached to their natural substrate show individual organisms, common discharge opening, and stolons which assist the organisms in fixation and locomotion. Time-lapse sequences show the extension and the retraction of the stolons, assisted by internal ampullae, as well as the locomotion and division of entire colonies. In the following: various cell types located in the mantle, and selected internal organs from individual organisms, such as the central nervous system, the pharynx, the gastrointestinal tract, and the heart as it reverses its beating direction. The vegetative reproduction of the new abdomen and thorax from seperate primordia is further elucidated by showing buds in various phases of development. Demonstrating sexual reproduction, oocytes, semi-developed and fully developed larvae are shown while swimming. Once anchored to a substrat, metamorphosis begins, during the course of which the larval tail soon is retracted. The film closes with the newly founded primary colony extending its feet and crawling around.
Keywords morphology / Tunicata reproduction, sexual / Tunicata reproduction, asexual / Tunicata metamorphosis / Tunicata locomotion / Tunicata colony / Tunicata Diplosoma migrans Tunicata Ascidiacea tunicates ascidians sea squirts
IWF Classification Biologie Ethologie, Morphologie Zoologie zoology ethology, morphology biology