Description
Cells markedly compressed and often twisted , in face view more or less elliptical, oval , or heart-shaped . In lateral view narrower , rhombic, elliptic , or wedge-shaped . The 4 flagella emerge from an anterior pit , as 2 opposite pairs. Two lateral chloroplasts without pyrenoids . A single eyespot is usually present. Freshwater species SINOPHYCEAE 1263 contain 2 contractile vacuoles. Flagella covered ··tith small square scales overlain by rod-shaped nes. Two opposite rows of hair-shaped scales . 1sexual reproduction by longitudinal fission into 2 •r 4 cells within the parental wall. Daughter cells tre usually inverted with respect to each other . ~arely sighted flagellates , in fresh water and Tetraselmis >rackish water. Six species . See Melkonian and kedly >reisig (1986) . Scherffe/ia dubia (Perty) Pascher, 1 911 \forma maxima 24-26 x 20-21 ~ m) , in side view obovate to wedge-shaped, often with a short posterior protuberance . This species (the type species of the genus) was examined in detail by Melkonian and Preisig ( 1 986) , using TEM . Other species remain incompletely known.
Type species
Figures
Raw text
Cells markedly compressed and often twisted , in face view more or less elliptical, oval , or heart-shaped . In lateral view narrower , rhombic, elliptic , or wedge-shaped . The 4 flagella emerge from an anterior pit , as 2 opposite pairs. Two lateral chloroplasts without pyrenoids . A single eyespot is usually present. Freshwater species SINOPHYCEAE 1263 contain 2 contractile vacuoles. Flagella covered ··tith small square scales overlain by rod-shaped nes. Two opposite rows of hair-shaped scales . 1sexual reproduction by longitudinal fission into 2 •r 4 cells within the parental wall. Daughter cells tre usually inverted with respect to each other . ~arely sighted flagellates , in fresh water and Tetraselmis >rackish water. Six species . See Melkonian and kedly >reisig (1986) . Scherffe/ia dubia (Perty) Pascher, 1 911 \forma maxima 24-26 x 20-21 ~ m) , in side view obovate to wedge-shaped, often with a short posterior protuberance . This species (the type species of the genus) was examined in detail by Melkonian and Preisig ( 1 986) , using TEM . Other species remain incompletely known.