Welcome to the Diatom Image Database! The Periphyton Group at Florida International University created and maintains the Diatom Image Database, which includes over 980 diatom taxa found in the greater Everglades region of south Florida. Please send questions or comments about the Diatom Image Database to Franco Tobias .
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Pinnularia streptoraphe 01
Patrick, R. & Reimer, C. W. (1975). The Diatoms of the United States 2(1). Monographs of the Academy of Natural Sciences of Philadelphia. Pennsylvania. pp. 639; 668-669 [pl.64:4]
Pinnularia streptoraphe Cl. 1891; Navicula streptoraphe (Cl.) Temp. & Perag. 1908
Valve is broadly linear with rounded ends; axial area is distinct but is less than 1/3 the breadth of the valve; raphe is complex, with distinct "question mark"-shaped terminal fissures; central area is more or less asymmetrical and rounded; striae are almost parallel throughout most of the valve, becoming slightly radiate in the middle portion and slightly convergent toward the ends, and crossed by a broad band; length is 135-260µm, breadth is 20-35µm; striae count is about 5 in 10µm