50 



PLATE 10 

 Asterotheca (ex Pecopteris ) sp. 4, p. 17 



Figure 



1 Specimen USNM 13288; scale 5:1 



2 Specimen USNM 13288; scale 1:1 



Spores of Asterotheca (ex Pecopteris ) sp. 4 (correlated with Punctatisporites 

 minutus ) 



Figure 



3 Specimen USNM 13288; scale 1000:1; scanning electron micrograph. 



4 Specimen USNM 13287 (counterpart of 13288); negative 8588; coordinates 

 130.9 x 49.4; size 16.3 x 15.9 urn; scale 1000:1 



