Systematics and Evolution, Part A The Mycota

basidial development are quite different among
the various families of Exobasidiales or the
families of Microstromatales, the relationships
between the respective families within these
orders are not always clear, and some of them
are difficult to separate from each other without

molecular data. Unresolved phylogenetic rela-

tionships are discussed with the respective groups

in the next section. The fundamental characters

used in classifying the Ustilaginomycotina were

discussed in detail by Bauer et al. (1995a,b, 1997 )

and are therefore only briefly summarized here.

Ustilaginomycotina

Ustilaginomycetes

Ustilaginales Anthracoideaceae

Melanotaeniaceae

Ustilaginaceae

Websdaneaceae

Urocystidales Doassansiopsidaceae

Floromycetaceae

Glomosporiaceae

Mycosyringaceae

Urocystidaceae

Exobasidiomycetes

Tilletiales

dolipores Tilletiaceae

Entylomatales

simple interaction apparatus Entylomataceae

Ceraceosorales

intracellular hyphae,basidia two-sterigmate Ceraceosoraceae

Malasseziales

anamorph adapted to endothermic skin Malasseziaceae

Microstromatales Microstromataceae

Volvocisporiaceae

Quambalariaceae

aseptate basidiospores

sexual state unclear

septate basidiospores

loss of teliospores

Georgefischeriales Eballistraceae

Georgefischeriaceae

Gjaerumiaceae

Tilletiariaceae

loss of septal pores at maturity

lack of ballistospores

ballistospores

phragmobasidia

dolipores during maturation

local interaction zones

enlarged interaction zones

spore balls with sterile cells inside, haustoria

sori in flowers,haustoria

intracellular hyphae,loss of septal pores

two-celled teliospores,loss of septal pores

spore balls with sterile cells outside, haustoria

septal pores with two inner plates

interactive vesicles,

simple pores with membrane caps

Exobasidiales Brachybasidiaceae

Exobasidiaceae

Cryptobasidiaceae

Graphiolaceae

basidiospores with adaxially oriented hilar appendices

gastroid basidia

chains of gastroid basidia

basidiospores with abaxially oriented hilar appendices

Doassansiales Doassansiaceae

Melaniellaceae

Rhamphosporaceae

teliospores predominantly in balls

haustoria

complex interaction apparatus with cytoplasmic compartments ballistospores

intracellular hyphae

on Cyperaceae/Juncaceaeloss of septal pores

on dicots, haustoria

on Poaceae,loss of septal pores

on Restionaceae,loss of septal pores

complex interaction apparatus

with interaction tube

Fig. 11.6Systematic overview of Ustilaginomycotina integrating morphological, anatomical, ecological, and
molecular analyses. Characters on branches represent relevant markers reflecting apomorphies in some cases

306 D. Begerow et al.