From Infogalactic: the planetary knowledge core
Zoospores may possess one or more distinct types of flagella: tinsel or "decorated", and whiplash, in various combinations.
- Tinsellated (also known as straminipilous) flagella have lateral filaments known as mastigonemes perpendicular to the main axis which allow for more surface area, and disturbance of the medium, giving it the property of a rudder, that is, the purpose of being used for steering.
- Whiplash flagella are straight, to power the zoospore through its medium. There is also the 'default' zoospore, which only has the propelling, 'whiplash' flagella.
- Opisthokont. Posterior whiplash flagella, a characteristic of Chytridiomycota, and a proposed a uniting trait of the Opisthokonts, a large clade of eukaryotes containing animals and fungi. In most of these, there is a single posterior flagellum (Fig. 1a), but in Neocallimastigales, there are up to 16 (Fig. 1b)
- Anisokont. Biflagellate zoospores with two whip type flagella of unequal length (Fig. 1c). These are found in some Myxomycota and Plasmodiophoromycota.
- Zoospores with a single anterior flagellum (Fig. 1d) of the tinsel type, characteristic of Hyphochytriomycetes.
- Heterokont. Biflagellate zoospores (Fig. 1e, f) with both whiplash and tinsel type flagella attached anteriorly or laterally. These Zoospores are characteristic of Oomycota and other Heterokonts.
- C.J. Alexopolous, Charles W. Mims, M. Blackwell et al., Introductory Mycology, 4th ed. (John Wiley and Sons, Hoboken NJ, 2004) ISBN 0-471-52229-5