Identification key for freshwater bryozoans (Bryozoa)

Janjiš, Iva (2009) Identification key for freshwater bryozoans (Bryozoa). Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Freshwater bryozoans comprise a small but important group of benthic invertebrates, often an abundant component in lentic as well as in lotic water bodies. They are sessile and form colonies which usually do not overwinter. However, they form chitinised statoblasts as resting stages for reproduction and dispersal. Statoblasts include floating (floatoblasts, leptoblasts) and sessile (sessoblasts, piptoblasts) forms and are the important tool for species distinction. So far, only 19 species have been recorded in Europe, and 88 species worldwide. In the course of the first survey on freshwater bryozoans on the territory of the Republic of Croatia, eleven species were found: ten belong to the Class Phylactolaemata (Fredericella sultana, Plumatella casmiana, Plumatella emarginata, Plumatella fruticosa, Plumatella fungosa, Plumatella geimermassardi, Plumatella repens, Hyalinella punctata, Lophopus crystallinus and Cristatella mucedo) and one to the Class Gymnolaemata (Paludicella articulata). This study represents a detailed description of these species with special focus on the investigation of statoblasts. The identification of the resting stages include scanning electron microscopy for detailed anaylsis of the statoblast valves.

Item Type: Thesis (Diploma thesis)
Keywords: Freshwater bryozoa, Phylactolaemata, Gymnolaemata, taxonomic key, statoblasts, Croatia
Supervisor: Wöss, Emmy
Co-supervisor: Bakran-Petricioli, Tatjana
Date: 2009
Number of Pages: 44
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 11 Sep 2014 12:38
Last Modified: 11 Sep 2014 12:38
URI: http://digre.pmf.unizg.hr/id/eprint/2727

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