GENERIC CHARACTERS 



13 



Generic Characters 



Haptotypic Features and Bladder Membranes 



Trilete mark usually distinct, rays short or long, com- 

 missure and lips vary in prominence, arcuate markings 

 present or absent, contact areas lacking 



Trilete, rays long, commissure distinct, lips not prominent, 

 contact area present or absent 



Trilete, rays long, commissure distinct, lips poorly de- 

 veloped, contact areas lacking 



Trilete, commissure and lips usually present, or covered 

 by ornamentation, contact areas present or absent 



Monolete linear suture, lips and arcuate marks present or 

 absent 



Trilete mark distinct or indistinct, rays variable in length, 

 commissure and lips poorly developed 



Trilete, rays well developed, lips distinct, commissure thin 

 but distinct, flange distinct 



Trilete, rays distinct and long, lips elevated usually, com- 

 missure variable, apical papillae present or absent 



Trilete, rays long, lips and commissure present or absent 



Trilete, rays short to medium length, lips and commissure 

 variable, contact areas absent or present 



Trilete, rays long, lips and commissure well developed 



Trilete, rays long, lips present or absent, commissure thin 

 but distinct, equatorial ridge (arcuate) distinct, apical 

 papillae present or absent 



Trilete distinct or indistinct, rays short or long, lips usually 

 poorly developed, contact areas present or absent 



Alete or trilete mark vestigial, possibly trilete in one 

 species, distal surface largely or completely covered by 

 bladder, proximal surface covered by bladder 



Trilete, rays long, distinct arcuate ridge, lips and com- 

 missure distinct 



Proximal surface distinctly trilete, rays 10 to 12 microns 

 long 



Trilete, rays long, lips slightly developed, commissure thin 

 or open 



Trilete, rays relatively long, lips poorly developed, suture 

 thin, body covered by bladder 



Trilete, rays long, lips elevated, suture thin. Distally 

 bladder covers body and proximally the bladder covers 

 the body in part to almost entirely 



Thickness of Spore Coat 

 in Microns 



1.25 to 6.5 



Bladder— .75 to 2 

 Body— 1.5 to 5 



Excluding muri — 2 to 4 



1 to 3.5 



Proximal and distal surfaces — 



ca. 2 



Equatorial portion — 4.2 to 18.9 



Flange thickness — up to 1.5 

 Body — 2 to 3 



Bladder — very thin 

 Body — up to 3 



Variable due to thickened 

 corners — 1 to 9 



Generally 2 to 3 

 2 species up to 6 



Less than 3 



1 to 3 



Bladder — very thin 

 Body — up to 2 



6 to 



Spore coat — less than 2 

 Bladders— 1.5 to 2 



Proximally — 3 

 Distally— 4 to 5 



Body and bladder — 2 



Bladder— 1.5 to 2.2 

 Body— 2 to 3 



Affinity 



In part Pteriodospermic 



Filicales 



(?) Lycopodiales 

 (?) Gymnospermic 



(?) Sphenophy Hales 

 (?) Hepaticae 



Filicinean 



(?) Calamarian 



Unknown 



Lycopodiales 

 Cordaitalean 



(?) Filicales 



Calamarian 



(?) Sphenophyllales 



Unknown 



Lycopodiales 

 Filicales 



Gymnospermic 



Unknown 

 Gymnospermic 



Unknown 



Unknown 

 (Gymcspermic) 



Gymnospermic 



