Oomycetes: 1. Hyphal architecture: Aseptate and coenocytic tubular hyphae The stramenopiles include the golden algae (Chrysophyta), the brown algae (Phaeophyta), and the diatoms (Bacillariophyta).Stramenopiles have chlorophyll a, chlorophyll c 1 /c 2, and fucoxanthin as photosynthetic pigments.Their storage carbohydrate is chrysolaminarin. The other subgroup of chromalveolates, the stramenopiles, includes photosynthetic marine algae and heterotrophic protists. Stramenopiles (also known as heterokonts) usually have a flagellate stage in the life cycle that has a characteristic type of stiff tubular ‘hairs’ arranged in two rows on one flagellum (see Patterson, 1999).These flagellates swim in the direction the hair-bearing flagellum is pointing. Simpson, Y. Eglit, in Encyclopedia of Evolutionary Biology, 2016. These organisms share morphological characteristics with fungi, but phylogenetic analysis has shown that they are not closely related. While some lack cell walls, others have scales. Stramenopiles have two flagella of different length, one at the front of the cell, and one attached further back. Microscopic and floating (about the size of a human red blood cell) Oval or elliptical shape, single cell alga; Has two hair-like short tails used for swimming and to attach to things, two saddle-shaped chloroplasts; Often blooms in large numbers A ‘hairy’ flagellum is often paired with a shorter, smooth flagellum. The front flagellum has tiny, three-part forked brstles running along each side (called mastigonemes). Diatoms are a single-celled algae with a unique silicon-based cell wall. Unique Characteristics: Our example is a Trypanosoma ... Stramenopiles 1. The unifying feature of this group is the presence of a textured, or “hairy,” flagellum. A.G.B. Many stramenopiles also have an additional flagellum that lacks hair-like projections (Figure 9). Physical Characteristics. The Kareniaceae group within a clade consisting of haptophytes and stramenopiles, this clade is supported by unique sequence characteristics. This group of protists have flagella with many short hair-like structures along the length of the flagella. Neighboring taxonomic group: Based on the phylogenetic analysis with 18S rRNA, oomycetes are more related to Heterokontae which contain diatoms and golden-brown algae 2. Ø Both groups undergo sexual reproduction. Many important photosynthesizers are stramenopiles and not all stramenopiles are single-celled. Other articles where Stramenopiles is discussed: protozoan: Annotated classification: Stramenopiles Group consists of 4 heterotrophic clades and 15 predominantly autotrophic clades and contains many examples of secondarily-derived heterotrophs; in autotrophic groups, fucoxanthin is the dominant accessory pigment. Stramenopiles. 2 In the petH phylogeny, at least 5 isoforms were recovered for Karenia. A group of non-photosynthetic stramenopiles is the Oomycetes, and there are over 600 described species. 3) are a remarkably diverse, monophyletic group that includes: planktonic diatoms, small single-celled or colonial freshwater protists (golden algae), large multicellular marine seaweeds (brown algae), and water molds, which include the pathogen responsible for the potato blight that drove millions of people in Ireland hungry in the nineteenth century. Difference between Oomycetes and True Fungi (1). 2. Stramenopiles (Fig. Ø Both groups produce spores as a mode of reproduction. This flagellum beats out a water current which moves the … General Characteristics and structures - members of this group include members that have flagellum with numerous fine, hair like projections. ’ flagellum is often paired with a unique silicon-based cell wall of the cell, and one further. 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