Family: Circumferential paratene of mono- or dikinetids; not cirral or bristle-like.
Genus: Paratene makes nearly closed circle around body; ventral kinety often present (Illustrated Guide, 1985).
Ovoid to spherical; adoral zone very conspicuous two to four conspicuous sickle-form frontal membranellae, adoral membranellae extend down cytopharynx; no body bristles or cirri (Kudo, 1966). Body conical, ovoid or elongate posteriorly; somatic cilia absent; AZM composed of large membranelles which emerge from the peristome and encircle the apex of the cell; polysaccharide plates or platelets may conver and strengthen the posterior portion of the body (Carey, 1992).
->> Description at WPRNO Google Image Search
Similar Genus -> > Strobilidium; Halteria;
Strombidium sp.
44 x 34 μm
memb. 26 μm
Japan, 1998
Strombidium sp.
54 x 37 μm
memb. 15 μm
Japan, 1998
Strombidium sp.
47 x 37 μm
Japan, 1999
S. caudatum ?
or S. calkinsi ?
35 x 14 μm
Tatebayashi
Gunma, 2001
S. armatum ?
52 x 36 μm
Urawa
Saitama, 2001
S. viride ?
46 x 37 μm
Mizumoto Park
Tokyo, 2001Strombidium sp.
cell μm
Japan, 1999
Strombidium sp. ?
25 x 15 μm
Jizoh-bori
Sannoh Park
Saitama, 2005
Strombidium sp. ?
72 x 48 μm
Sankaku-numa
Higashi-matsuyama
Saitama, 2007