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Oligohymenophorea (formerly Nassophorea): Peniculida: Frontoniina: Frontoniidae

Frontonia marina
Farre-Dom., 1891
Syn: F. leucas var. marina Florentin, 1899

Genus: Postoral kineties usually to left of oral poykinetids (Illustrated Guide, 1985). Left edge is more curved than right edge; cytopharynx with numerous strong fibrils; ectoplasm with numerous fusiform trichocysts; macronucleus oval; one to several micronulei (Kudo, 1966).
Species: Cell body 150-600 μm long; posterior end slightly pointed; two ovoidal micronuclei; a single contractile vacuole (Kahl, 1930).
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RAPD tree of Frontonia (Tsukii, Jpn. J. Protozool., vol. 36, 2002)
Type I: Anterior slightly wider than posterior
Frontonia marina
40-1a
μm
2-3 Mic.
Mac. spherical
Uruguay, 1999
Frontonia leucas
stock, Sao-1
posterior pointed
169 x 75 μm
Omiya
Saitama, 2001
Frontonia leucas
stock, Sao-2
posterior pointed
150-190 x 48-65 μm
Mac. ovoid
Saitama, 2001
Frontonia
stock, Ssos-5
320 x 130 μm
Shiba river
near Owada Park
Saitama, 2005
Frontonia marina
stock, Iao-2
180-205 x 65-75 μm
Mac. spherical
Hawaii, 2001
Type II: Anterior not wider than posterior
Frontonia marina
stock, Iao-1
200-225 x 70-90 μm
Hawaii, 2001
Frontonia marina
stock, Shm-1
2 Mic. spherical
158-185 x 53-72 μm
Shizuoka, 2001
Frontonia marina
Shm-1
158-185 x 53-72 μm
1-3 Mic.
Shizuoka, 2001
Frontonia marina
D-5
Type II
μm
1-2 Mic.
Tokyo, 199?
Frontonia marina
Tna-1
μm
1-2 Mic.
Tochigi,
Misc. type unkown
Frontonia marina
F. marina
Type ?
250 x 94 μm
Japan, 1997
Frontonia
F. marina
Type ?
194 μm
conjugating pair
USA, 1999
Frontonia
F. marina ?
170 x 93 μm
Okubo Ryoke
Akigase park
Saitama, 2004

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Frontonia marina
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