Page:Bergey's manual of determinative bacteriology.djvu/246




 * B. Cells occur in chains.

II. Cells ellipsoidal.

1. Naumanniella neustonica Dorff, 1934. (Die Eisenorganismen, Pflanzen- forschung, Heft 16, 1934, 21.) neus.to'ni.ca. Gr. adj. neustus swimming, floating; M.L. adj. neusfonicus of the neus- ton (surface film). Cells, including the torus, 1.8 to 3.3 by 4.9 to 10 microns; never curved but may be slightly constricted. Without the torus the cells measure 2.5 by 6.0 microns. Occur singly in the surface film of water, rarely on submerged plants. Source: Found on the surface of iron- bearing water from wells near Freienwalde (1931) and Stolzenhagen (1932) in Mark Brandenburg; also isolated at Brisbane, Australia. Habitat: Widely distributed in swamp water.

2. Naumanniella minor Dorff, 1934. (Die Eisenorganismen, Pflanzenforschung, Heft 16, 1934,21.) mi'nor. L. comp.adj. minor smaller. Cells, including the torus, 1.2 to 1.5 by 3.1 to 3.6 microns; occur singly in the form of rods which frequently are curved or spiral-shaped. The cells are 0.9 by 3.0 mi- crons irrespective of the torus. Usually found in or on the bottom mud of fresh- water ponds and swampy areas. Source: Found at Wurms (Rhein) in the bottom of a well which contained iron-bear- ing water. Habitat: Widely distributed in swamp water; also found on ore or on the submerged leaves of water plants.

3. Naumanniella pygmaea Beger, 1949. (Zent. f. Bakt., I Abt., Orig., 154, 1949, 65.) pyg.mae'a. Gr. adj. pygmaeus dwarfish. Small, straight rods, with rounded ends, 1 by 2 microns with the torus. Occur singly. Source: Isolated from pipes and deep wells of waterworks near Berlin. Found on the surface of the gelatinous mass formed by Zoogloea filipendula Beger. Habitat: Presumably widely distributed. 4. Naumanniella catenata Beger, 1941. (Zent. f. Bakt., II Abt., 103, 1941, 32.) ca.te.na'ta. L. part. adj. catenatus in chains. Cells 0.4 to 0.5 by 4.6 to 5.2 microns; with the torus, 1.0 to 1.2 by 4.9 to 5.5 microns. Cells elongated or slightly curved with thick walls impregnated with iron. After division the cells remain connected in chains of several to many (3 to 12). These cells are joined together in such a manner that, because of the iron-impregnated, marginal thickenings and the relatively clear cells inside, they give the appearance of a chain with elongated links. Non-motile and unattached. Source: Found on glass slides submerged in spring water near Magdeburg, Germany. Habitat: Presumably widely distributed in or on the bottom mud of iron-bearing waters.

5. Naumanniella elliptica Beger, 1949. (Zent. f. Bakt., I Abt., Orig., 154, 1949, 63 and 65.) el.lip'ti.ca. Gr. adj. ellipticus defective, elliptical. Cells ellipsoidal, 2.0 by 2.5 to 3.0 microns, with a pronounced torus. Source: Found in pipes and deep wells of waterworks near Berlin. Found on masses of Crenothrix polyspora threads lying on the bottom mud. Habitat: Presumably widelj' distributed in or on the bottom mud of iron-bearing waters.