G. Montejano et al., FRESH-WATER EPIPHYTIC CYANOPROKARYOTES FROM CENTRAL MEXICO .3. THE GENUS STICHOSIPHON-GEITLER 1932, Archiv fur Protistenkunde, 148(1-2), 1997, pp. 3-16
This is the third study on the cyanoprokaryotic (cyanophycean, cyanoba
cterial) epiphytes, colonizing submersed substrates (mainly other fila
mentous algae) in streaming waters in central Mexico. The species of t
he genus Stichosiphon GEITLER 1932 were all made synonyms of S. sansib
aricus by DROUET & DAILY (1956). We have found six morphotypes, which
can be distinguished at the species level, five corresponding to speci
es defined by previous authors and one new species, S. exiguus. The mo
rphological variation of the Mexican populations was studied, and the
comparison with the original descriptions of type specimens is present
ed. The characters applied in the taxonomy of the genus Stichosiphon a
re discussed. One other species, known from Burma (SKUJA 1949), was re
defined according to the present diacritical features for this genus (
S. skujae).