986 



MANUAL OF DETERMINATIVE BACTERIOLOGY 



in Eiigler und Prautl, Die naturl. Piiaii- 

 zenfam., 1 , la, 1895, 38; Lyngbya epiphy- 

 iica Hieronymus, in Kirchner, ibid., 67; 

 Chester, Manual Determ. Bact., 1901, 

 370; Leptothrix voliibilis Cholodny, 

 Cent. f. Bakt., II Abt., 61, 1924, 292; 

 Chlamydothrix epiphytica Naumann, 

 Ber. d. Deutsch. Bot. Ges., 46, 1928, 141.) 

 From M.L. epiphyiicus, epiphytic. 



Long cylindrical unbranched filaments 

 growing spirally around filaments of 

 Tolypothrix, Oedogonium, etc. Cells 

 rod -shaped, 1 by 2 microns. 



Sheaths cjdindrical, encrusted witli 

 iron. 



Cells may leave the sheaths as in 

 Leptothrix ocliracea. 



Habitat: Water. 



8. Leptothrix pseudovacuolata (Per- 

 filiev) Dorff. (Spirothrix pseudovacuo- 

 lata Perfiliev, Verb. d. Int. Verein. f. 

 theor. u. angew. Limnologie, 1925, 

 Stuttgart, 1927; Dorff, Die Eisenorganis- 

 men, Pflanzenforschung, Heft 16, 1934, 

 36.) From Greek, having false vacuoles . 



Filaments 85 to 250 microns in length, 

 unbranched, spirally wound, occasion- 

 ally straight. Strongly encrusted with 

 ferric hydroxide. Spirals 20 to 24 mi- 

 crons from crest to crest. 



Cells rounded at the ends, tiiin-walled, 

 granular, 1.7 to 2.8 by 3.5 to 30 microns. 



Apparently heterotrophic. 



Habitat : Found in bottom muds of deep 

 lakes with very low oxygen content. 



Appendix: The following simple, fila- 

 mentous organisms have also been placed 

 in the genus Leptothrix or appear to 

 belong here : 



Chlamydothrix thermalis Molisch. 

 (Die Eisenbakterien in Japan. Sc. Ee- 

 port Tohoku J. Univ., 4 Ser. Biol., 1, 

 1923, 135; Leptothrix thermalis Dorfi , Die 



Eisenorganismen , Pflanzenforschung, 

 Heft' 16, 1934, 38.) From hot springs 

 in Japan. 



Leptothrix hyalina (Migula) Bergey et 

 al. (Streptothrix hyalina Migula, in 

 Engler and Prantl, Die natiirl. Pfianzen- 

 fam., 1, la, 1895, 38; Chlamydothrix hya- 

 lina Migula, Syst. d. Bakt., ^, 1900, 1003; 

 Bergey et al.. Manual, 1st ed., 1923, 391.) 

 From swamp water. 



Leptothrix major Dorff. (Die Eisen- 

 organismen, Pflanzenforschung, Heft 16, 

 1934, 35.) From Spree River water near 

 Berlin. 



Leptothrix winogradskii Cataldi. 

 (Thesis, Univ. Buenos Aires, 1939, 64.) 

 From water. 



Lieskeella bifida Perfiliev. (Perfiliev, 

 Verh. d. internat. Vereinigung f . theoret. 

 u. angew. Limnologie, 1925, Stuttgart, 

 1927; quoted from Dorff, Die Eisen- 

 organismen, Pflanzenforschung, Heft 16, 

 1934, 27; also designated Lieskeella bi- 

 filaris by Perfiliev.) From iron bearing 

 water. Shows gliding movements simi- 

 lar to blue-green algae. The type spe- 

 cies of tlie genus Lieskeella Perfiliev. 



Sideromyces glomerata Naumann. 

 (Quoted from Dorff', Die Eisenorganis- 

 men, Pflanzenforschungen, Heft 16, 

 1934, 27.) From swamps in the Aneboda 

 region of Sweden. This is the type 

 species of the genus Sideromyces syn. 

 Mycogallionella Naumann. 



Sphaerothrix latens Perfiliev. (Per- 

 filiev, Verh. d. internat. Vereinigung f. 

 theoret. u. angew. Limnologie, 1925, 

 Stuttgart, 1927; cjuoted from Dorff, Die 

 Eisenorganismen, Pflanzenforschung, 

 Heft 16, 1934, 29.) From a peat bog in 

 a small pond near Leningrad. This is 

 the type species of the genus Sphaero- 

 thrix Perfiliev. Grows in disks showing 

 a concentric structure. 



