TRICHOPHYTONEAE 531 



Trichophyton fuscum Dodge, n. nom. 



Trichophyton fuscum sulcatum Neuber, Derm. Woch. 80: 861-872, 1925. 



Producing- sycosis, with broken hairs twisted spirally in the scales, in 

 young men whose beard is just beginning to grow. Germany. 



Aleurospores lateral or terminal ; ehlamydospores only in old cultures ; 

 arthrospores present. Microscopically close to T. tonsurans. 



Colony coffee brown or roebuck brown, central crater disappearing in 

 about a month, leaving a deeply reticulate, wrinkled colony. 



It is interesting to note that this organism attacks the beard in the male 

 before the gonads have reached their full activity; whether the lesions dis- 

 appear spontaneously with the completion of puberty is unknown. In other 

 respects the organism agrees closely with the other species producing pre- 

 pubertal tinea capitis, Mahnsteiiia type. 



Trichophyton sulfureum Sabouraud, Maladies du cuir chevelu 3: 317, 

 318, 1910. 



Trichophyton with primrose colored crater T. C. Fox, Proc. R. Soc. Med. 

 2: Derm.: 49-68, 1908. 



Trichophyton sulfuratum Bessunger [nom. nud.], Unters. ii. Dermatomy- 

 kosen Diss. Bonn 17, 18, 1915. 



Trichophyton germen I. Gregorio, Actas Dermosifiliogr. 23: 710-714, 1931. 



Producing typical endothrix lesions, common in England, Australia, rare 

 in Bonn, Germany, in Milan, Italy, and in Algeria. 



Culture at first velvety, then a red nodule appears and the rest of the 

 colony takes on a delicate yellow (primrose) color which persists as the colony 

 grows and becomes powdery, its sulphur yellow color persists, center often 

 speckled, and the base of the crater often irregular, interior often folded. 

 The red orange of the center is paler in successive subcultures, but the yellow 

 color is permanent. At 37° C, the colony is crateriform and red (Weiss, 1930). 



Trichophyton tonsurans Malmsten, Trichophyton harskarande Mogel 1845 

 [tr. Arch. Anat. Physiol. Wiss. Med. 1848: 1-19, 1848]. 



Trichomyces tonsurans Malmsten, Trichophyton harskarande Mogel 1845 

 [tr. Arch. Anat. Physiol. Wiss. Med. 1848: 1-19, 1848]. 



Oidium tonsuram Zopf, Die Pilze, 482, 1890. 



Trichophyton megalosporum endothrix Sabouraud, Trichophyties Hum. 17, 

 1894. 



Trichophyton crateriforme Sabouraud in Bodin, Champ. Paras. Homme 

 108-110, 1902. 



ChJamydoaleurosporia crateriformis Grigorakis, Ann. Sci. Nat. Bot. X, 7: 

 412, 1925. 



Trichophyton {Chlamydoaleiirosporia) crateriforme Guiart & Grigorakis, 



Lyon Med. 141: 377, 1928. 



Produces tinea tonsurans of Malmstenia type (see pp. 445. 446). the com- 

 monest species of Trichophyton in Paris, apparently widespread in Western 

 Europe. Inoculable to guinea pig, but lesion soon heals spontaneously. 



