974 



FUNGACE/E~PHYCOMYCETES 



Mucor pusillus Lindt, 1886. 

 Mycelium at first white, then yellowish. The hyphae carrying 

 sporangia are much shorter than in the preceding species. The 

 sporangium is globular, at first pale greyish, then dark greyish. 

 Its diameter varies between 50 and 80 The columella is clavi- 

 form, ovoid or spherical, yellowish or brownish. The spores are 

 smooth, spherical, 3 to 3*5 in diameter. 



Fig. 479. — Mucor mucedo Fig. 480. — Mucor pusillus Lindt. 



LlNN^us. (After Lindt.) 



M. pusillus is often found in bread which has been soaked in 

 water. It is very pathogenic to rabbits; it has once been found 

 in man in a case of otomycosis by Jakowski. 



Genus Liehtheimia Vuillemin, 1904. 

 Non-ramified mycelium; rhizoids may be present or not; ped- 

 uncle supporting sporangium terminates in a formation encircling 

 the base of the columella. 



Liehtheimia corymbifera Cohn, 1884. 

 Synonym.— iif^^cor corymbifer Cohn, 1884. 



Mycelium at first white, then yellowish. The sporangia are pear- 

 shaped, 10 to 70 /I in diameter; columella conical, dark greyish or 

 brownish ; spores elliptical, 2 to 3 The hyphae carrying sporangia 

 are ramified in corymbiform formation. This parasite has been 

 observed several times in man, giving rise to a mycosis of the ear 

 (Hiickel, Siebenmann, Graham), of the nose (Siebenmann), of the 

 lungs (Podack). A case of generalized infection has been recorded 

 by Paltauf (see p. 977). 



Liehtheimia ramosa Lindt, 1886. 

 Synonyms. — Mucor ramosus Lindt, 1886; Liehtheimia ramosa 

 Vuillemin, 1904. 



Closely resembles L. corymbifera, but rhizoids are often present. 

 The spores are larger, ovoidal, 4 to 7 in length. The columella 

 is always smooth. 



This species has been observed in man by Jakowski in a case of 

 otomycosis. According to Vuillemin, it is frequently found in the 

 nasal mucosa of horses. 



