224 



ORDER I. PSEUDOMONADALES 



B. Cells occur in chains. 

 II. Cells ellipsoidal. 



3. N aunianniella pygtnaea. 



4. Naumanniella catenata. 

 6. Naumanniella ellipiica. 



1. Naumanniella nenstonica 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. 



