Key to Families in the Rhizophydiales using Ultrastructural Characters
A. Kinetosome associated, crescent-shaped structure a spur ..................................B
B. Spur solid (Fig. 6.3F) ....................................................Terramycetaceae
BB. Spur layered (Fig. 6.3G) ..............................................Rhizophydiaceae
AA. Kinetosome-associated-crescent-shaped spur absent (Fig. 6.3D)........................C
C. Fibrillar bridge between kinetosome and nonflagellated centriole
diagonal and electron-opaque core in kinetosome (Fig. 6.3K) .....................D
D. Electron-opaque core in kinetosome and in nonflagellated
centriole (Fig. 6.3K) .................................... Kappamycetaceae
DD. Electron-opaque core in kinetosome and no electron-opaque core
in nonflagellated centriole (Fig. 6.3O,P) ....................Alphamycetaceae
CC. Fibrillar bridge between kinetosome and nonflagellated centriole
perpendicular and no electron-opaque core in kinetosome or nonflagellated
centriole (Fig. 6.3I, J) ........................................................................E
E. Nucleus embedded within ribosomal aggregation .....................F
F. Perpendicular zone of convergence in fibrillar bridge between
kinetosome and nonflagellated centriole wide, greater than
0.025 μm (Fig. 6.3S, T) .........................Globomycetaceae
FF. Perpendicular zone of convergence in fibrillar bridge between
kinetosome and nonflagellated centriole narrow, less than 0.025
μm (Fig. 6.3U, V) ............................Gorgonomycetaceae
EE. Nucleus at surface of ribosomal aggregation ............................G
G. Close association of a portion of the microbody with the
kinetosome ...................................... Angulomycetaceae
GG. No close association of a portion of the microbody with the
kinetosome ............................................................H
H. Perpendicular zone of convergence in fibrillar bridge
between kinetosome and nonflagellated centriole wide,
greater than 0.025 μm ......................Aquamycetaceae
HH. Perpendicular zone of convergence in fibrillar bridge
between kinetosome and nonflagellated centriole
narrow, less than 0.025 μm ................................I
I. Microbody not branching extensively away from
lipid globule (Fig. 6.3Q) .............Pateramycetaceae
II. Microbody branching extensively away
from lipid globule (Fig. 6.3R) ....Protrudomycetaceae
Chytridiomycota, Monoblepharidomycota, and Neocallimastigomycota 153