882 



ORDER VIII. MYXOBACTERALES 



Source : Isolated from antelope dung from 

 Africa; found later by Thaxter on deer dung 

 from the Philippines and Florida. Baur 

 (Arch. f. Protistenkunde, 5, 1905) found it 

 on rabbit dung near Berlin, and Kofler (Sitz- 

 ber. d. kais. Akad. wiss. Wien, math.-nat. 

 Klasse, Abt. I, 122, 1913) reports it from the 

 same source near Vienna. 



Habitat: Found on decaying organic mat- 

 ter in soil and in the dung of various ani- 

 mals. 



Illustrations: Thaxter {op. cit., 1897, PI. 

 30, Figs. 1-15), Quehl (Cent. f. Bakt., II 

 Abt., 16, 1906, PI. 1, Figs. 13 and 14), Jahn 

 (Beitrage zur bot. Protistologie. I, Die 

 Polyangiden. Gab. Borntraeger, Leipzig, 

 1924, 199, Fig. 5) and Kuhlwein (Arch. Mi- 

 krobiol., 17, 1952, 403 (best)). 



6. Chondromyces pediculatus Thax- 

 ter, 1904. (Bot. Gaz., 87, 1904, 410.) 



pe.di.cu.la'tus. L. dim. noun pediculus a 

 small foot (stalk); M.L. adj. pediculatus 

 having a small foot or stalk. 



Vegetative cells: Rods 0.6 to 0.7 by 2.0 

 to 4.0 microns. 



Fruiting bodies: Cysts rounded to bell- 

 shaped, truncate at distal end, orange-j^el- 

 low; when drj% orange-red, 35 to 50 microns. 

 Sessile on stalks 40 to 60 microns in length 

 which are arranged as an umbel on the tip 

 of the stalk. Stalk 300 to 700 microns in 

 length, solitary, simple, usually rather slen- 

 der and somewhat wrinkled. 



Source: Isolated from goose dung from 

 South Carolina. 



Habitat: Found in the dung of various 

 animals. 



Illustrations: Thaxter {ibid., PL 26, Figs. 

 7-13). 



7. Chondromyces medius Krzemieniew- 

 ski, 1930. (Acta Soc. Bot. Poloniae, 7, 1930, 

 263.) 



me'di.us. L. adj. medius medial, mod- 

 erate. 



Vegetative cells: Tapering rods, 0.6 to 

 1.0 by 4.5 to 9.2 microns. Nearly colorless 

 in mass. 



Fruiting bodies: Reddish orange cysts 

 becoming light brown, attached to the stalk 

 by pedicles about 40 microns long. Cysts 28 

 to 87 by 32 to 94 microns, variable in shape, 

 predominantly flattened at the base, some- 

 times narrowing and elongated. Resting 

 cells in cysts 0.7 to 1.2 by 3.5 to 5.0 microns. 



Source: Isolated from soil from Poland; 

 also found on a fungus in Panama. 



Illustrations: Krzemieniewska and Krze- 

 mieniewski {ibid., PL XVII, Figs. 20-22; also 

 see Bull. Intern. Acad. Pol. Sci. Lettres, 

 No. 1-10, S6rie B (I), 1946, PL 1, Figs. 11- 

 13). 



8. Chondromyces catenulatus Thax- 

 ter, 1904. (Bot. Gaz., S7, 1904, 410.) 



ca.te.nu.la'tus. L. noun catena chain; 

 L. dim. noun catenula a small chain; M.L. 

 adj. catenulatus having small chains. 



Vegetative cells : Cultivated only on origi- 

 nal substrate. Rods 1.0 to 1.3 by 4.0 to 6.0 

 microns. 



Fruiting bodies: Cysts light yellow- 

 orange, 18 by 20 to 50 microns in rosary-like 

 chains which may be branched once or twice, 

 sessile on a short, compact stalk, cysts sepa- 

 rated by shriveled isthmuses. Chains up to 

 300 microns. Stalk simple, 180 to 360 mi- 

 crons, cleft above and passing over into the 

 chains, rather broad at the base and spread- 

 ing somewhat on the substratum. The di- 

 visions of the stalk are pointed, short and 

 slightly swollen. 



Source : From decaying poplar wood from 

 New Hampshire. 



Illustrations: Thaxter {ibid., PL 26, Figs. 

 1-5). 



FAMILY V. MYXOCOCCACEAE JAHN, 1924. 



(Beitrage zur bot. Protistologie. I, Die Polyangiden. Geb. Borntraeger, Leipzig, 1924, 84.) 



Myx.o.coc.ca'ce.ae. M.L. mas.n. Myxococcus type genus of the familj^; -aceae ending to 

 denote a family; M.L. fem.pl.n. Myxococcaceae the Myxococcus family. 

 The rods become shortened when fruiting occurs and develop into spherical or ellipsoidal 



