image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium cucurbitinum
(Bisset) Lütkemüller
= Actinotaenium cucurbitinum (Bisset) Teiling 1954

Species [ var. cucurbitinum ]: Cell body medium in size, (56.5-73)-83 μm long, 26-(28-30)-33 μm wide, L/W=2.5, slightly constricted at the center; semicells semi-spindle shaped, gradually attenuated toward apex, lateral margins convex, apex broad circular; cell wall dotted.
[ f. minor ]: Smaller than var. cucurbitinum, 50-(56-60) μm long, 22.5-25-(26.5-28) μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).
Google Image Search
var. cucurbitinum: Cell body 26-33 μm long, L/W=2.5
Cosmarium
C. cucurbitinum ?
66 x 31 μm
Hakkoda Gourd line
Hakkoda mountain
Aomori, 2005
Cosmarium cucurbitinum
C. cucurbitinum ?
77 x 31 μm
Hachiman-numa m.
Hachimantai
Iwate, 2007
Cosmarium cucurbitinum
C. cucurbitinum
v. cucurbitinum
66-69 x 27-29 μm
L/W=2.4
Omine-numa
Minakami
Gunma, 2006
Cosmarium
C. cucurbitinum ?
66 x 27 μm
Omine-numa
Tsukiyono
Gunma, 2003
Cosmarium cucurbitinum
C. cucurbitinum
v. cucurbitinum
70 x 28 μm
L/W=
Chigo-ike 4
Shiga highland
Nagano, 2006.10
Cosmarium
C. cucurbitinum ?
59 x 25.5 μm
Hikage marsh
Shiga highland
Nagano, 2005
f. minor: Cell body 50- μm long
Cosmarium
C. cucurbitinum
f. minor
45 x 21 μm
L/W=2.1
Imou bog
Toyohashi
Aichi, 2004
Similar species -->> C. cucurbita (laterally straight, apex flattened); C. thwaitesii (apex broadly rounded);

Please click on species name for more images.
Cosmarium cucurbitinum
Copyright Protist Information Server