Genus: Cell body elongated spindle in shape, straight or curved, sharply pointed at both ends; (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Cell body fusiform, straight or slightly bowed, both ends tapered, 22-43 μm long, 2-6 μm wide; chloroplast parietal, elongated, with pyrenoids; cell division produces 4, 8, or 16 "autospores" (Photomicrographs of the Freshwater Algae, vol. 16, 1996).

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Cell body thick, short: L/W < 20
M. litorale ? 8 daughter cells 45 x 4 μm L/W=11 Uruguay, 1999	M. litorale stock Tok 4 daughter cells 29-48 x 3-5 μm L/W=10 Tochigi, 2000	M. litorale 4 daughter cells 43 x 6 μm L/W=7 Fujimi Saitama, 2000	M. litorale stock Sfh-1b 23-35 x 3-3.5 μm L/W=6.4-7.7 Fujimi Saitama, 2000
M. litorale 23-43 x 4.7-5.5 μm L/W=4.9-7.8 Kawagoe Saitama, 2001	M. litorale with a pyrenoid 33 x 5 μm L/W=6.6 Kurihashi Saitama, 2001	M. litorale with a pyrenoid 31-51 x 4-7 μm L/W=7.2-7.8 Kiyose Tokyo, 2001	M. litorale 4 daughter cells 8-16 x 3-6 μm L/W=2.7 Tsukuba Ibaraki, 2000
M. litorale old culture 22-43 μm L/W=8 Otawara Tochigi, 2000	M. litorale 15-30 μm L/W=4.8-6.5 Iwajuku Gunma, 2001	M. litorale stock Giw-21 27-37 μm L/W=3.9-5.7 Iwajuku Gunma, 2001	M. litorale stock Itu-1, axenic 4 daughter cells 2.7-5.5 μm L/W=6.2-9.2 Ibaraki, 2000
M. litorale old culture 39 x 2.3 μm L/W=17.0 Shakujii Park Tokyo, 2001	M. litorale 23 x 4 μm L/W=5.8 Ueno Tokyo, 2001	M. litorale 19-36 x 2-4 μm L/W=9.0 Toneri Park Tokyo, 2001	M. litorale μm L/W= Inari Park Toyama, 2002
M. litorale μm L/W= Chichibu Saitama, 2003	M. litorale μm L/W= Iruma Saitama, 2003	M. litorale μm Numappara marsh Kuroiso Tochigi, 2003	M. litorale 25 x 2.5 μm Senuki Nasu Tochigi, 2004
M. litorale 30 x 3.5 μm near Town Hall Shobu Saitama, 2004	M. litorale 32 x 3.5 μm Tennoh Tessei-cho Okayama, 2004

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