50 



PENNSYLVANIAN SPORES OE ILLINOIS 



Holotype.— Maceration 542-C Slide 2, 

 No. 8 coal bed, Peoria County, Illinois. 



Discussion. — F. similis is intermediate in 

 size between the smaller F. antiquus 

 Schopf, and F. elegans Wilson and Ko- 

 sanke, 1944, which is considerably larger. 

 It is similar in shape and construction to 

 F. elegans. 



Florinites triletus sp. nov. 

 Plate 12, figures 3-4 



Description. — Pollen grains are bilateral, 

 trilete, and elliptical in transverse plane in- 

 cluding bladder. The body was originally 

 spherical and folded around its periphery. 

 The holotype overall dimensions are 52.9 

 X 65.1 and the known size range is from 

 49 to 69 microns. The body of the holotype 

 measures 33.6 X 27.3 microns and the 

 known size range is from 25 to 36 microns. 

 Trilete rays are distinct on the proximal 

 surface of the body and average about 8.4 

 microns in length. Lips are indistinct or 

 absent, and the suture 1 to 1.5 microns in 

 width. The body of the grain is minutely 

 punctate, and the bladder is levigate exter- 

 nally and finely reticulate internally. The 

 body of the grain is 1 to 2 microns thick, 

 and the bladder is variously thickened due 

 to reticulations, but even so it does not ex- 

 ceed 1 to 1.5 microns. 



Holotype. — Maceration 574 Slide 3, 

 Shoal Creek coal bed, Bond County, Illi- 

 nois. 



Discussion. — Florinites triletus sp. nov. 

 is provisionally classified under Florinites. 

 The presence of a definite trilete mark is 

 contrary to the original description of the 

 genus by Schopf, Wilson, and Bentall 

 (1944). Only a limited number of speci- 

 mens were found and it is expected that 

 eventually a final decision can be made as 

 to the proper taxonomic treatment of this 

 form. 



GENUS Cadiospora gen. nov. 



Plate 16, figure 1 



The generic name Cadiospora is proposed 

 for spores of the following character: 

 Spores are radial, trilete, originally spherical 



or slightly pyramidal on the proximal sur- 

 face, usually flattened in fairly good proxi- 

 mal-distal orientation, and have strongly 

 developed arcuate ridges. The lips are 

 thick and prominent on all specimens. The 

 known size range is from 105 to 111.3 by 

 100 to 117.6 microns, based on measure- 

 ments of 25 specimens. The trilete rays 

 range in length from 39 to 46.2 microns 

 when not shortened by folding or twisting. 

 The lips range in thickness from 3 to 5 

 microns on either side of the suture. The 

 spore coat ranges in thickness from 6 to 8 

 microns. 



The characters mentioned above strongly 

 suggest a relationship with the megaspore 

 genus Triletes (Reinsch) Schopf as illus- 

 trated by Schopf (1938) except that the 

 new genus is at least 180 microns smaller 

 than any known species of Triletes. Fur- 

 ther, the lips of Cadiospora gen. nov. dis- 

 play the largest development of that struc- 

 ture known to spores of a comparable size. 

 This new genus may represent a megaspore 

 of unusually small size, in line with the 

 views of Thompson (1927). 



Regardless of the type of spore repre- 

 sented, its vertical distribution in Illinois is 

 limited to the upper McLeansboro group, 

 and therefore it is of importance in corre- 

 lation studies. 



Cadiospora magna sp. nov. 

 Plate 16, figure 1 



Description. — The genotype measures 

 117.6 X 111.3 microns, as oriented in plate 

 16, figure 1. The trilete rays vary in 

 length from 40 to 44 microns. The suture 

 is distinct and the lips vary in thickness 

 from 4 to 5 microns on either side of the 

 suture. The lips appear to continue as 

 thickenings in association with the arcuate 

 ridge. The apex of the rays (trilete aper- 

 ture) is open or closed. The rays divide 

 at the terminus of the rays and interradially 

 become the arcuate ridge. The spore coat 

 is minutely punctate to finely granulose, 

 and measures 6 to 8 microns in thickness. 

 Frequently small fragments of unmacerated 

 coal anpear to cling to the spore coat. 



Genotype. — Maceration 600 Slide 15, 



