Genus: Cell body small, length = width, strong constriction at its center; semicells inverted triangular, ellipsoidal, rectangular, etc. in shape; straight or slightly curved spiny projections at each corner; one pyrenoid in each semicell; cell wall smooth (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Semicells inverted semicircle or hexagon in shape; (Illustrations of The Japanese Fresh-water Algae, 1977).

Google Image Search

A. incus v. incus 17 x 13 μm 16 x 14 μm Tashirodaira marsh Hakkoda mountain Aomori, 2005	A. incus v. incus 16 x 16 μm Sukawa highland Kurikoma mt. Akita, 2007	A. incus v. incus μm Hachiman-numa m2 Hachimantai Iwate, 2007
A. incus v. incus 15 x 14 μm Iroha-numa Zao mountain Yamagata, 2005	A. incus v. incus 15 x 14 μm Iroha-numa 3 Zao mountain Yamagata, 2006	A. incus v. incus 15 x 15 μm near Iroha-numa Zao mountain Yamagata, 2006	A. incus v. incus μm Utsubo-numa Zao mountain Yamagata, 2008
A. incus v. incus 15 x 15 μm Yahei-daira m. Azuma mt. Yamagata, 2007	A. incus or A. extensus? 19 x 23 μm Yakebe-ike Higashi-Murayama Tokyo, 2006	A. incus v. incus ? 20 x 15 μm Japan, 199?
A. incus v. incus 18-20 x 16-18 μm Ushidome-ike Norikura highland Nagano, 2005	A. incus v. incus 21 x 16 μm Ushidome-ike Norikura highland Nagano, 2007	A. incus v. incus 15 x 15 μm Tanohara marsh Shiga highland Nagano, 2005	A. incus v. incus 18 x 16 μm Tanohara m.1 Shiga highland Nagano, 2007
A. incus v. incus ? 25 x 33 μm Shimo-no-koike Shiga highland Nagano, 2004	A. incus v. incus ? 15 x 15 μm Watasuge marsh Tsugaike highland Nagano, 2006	A. incus f. minor ? 17.5 x 14 μm Tanohara m.3 Shiga highland Nagano, 2007
A. incus v. ??? 21 x 15 μm USA, 1999

Please click on species name for more images.

Copyright Protist Information Server