18 



PENNSYLFANIJN SPORES OF ILLINOIS 



initely observed. It is similar to but 

 smaller than Knox's type IK (1942, p. 

 100). 



PUNCTATI-SPORLTES QUASIARCUATUS Sp. 



nov. 

 Plate 1, figure 9 



Description. — Spores are radial, trilete, 

 originally spherical, compressed outline 

 spherical to oval. The holotype measures 

 86 X 100.8 microns and the known size 

 range is from 82 to 104 microns. The spore 

 coat is distinctly punctate and the puncta- 

 tions are from 2 to 4.25 microns in diameter. 

 The spore coat is thin for this size of spore. 

 It measures 1.75 to 2.25 from the base of 

 punctations to the inner wall and slightly 

 more for the total thickness. The spores 

 generally possess markings (arcuate?) 

 which completely surround the tetrad scar. 

 This marking is more in the nature of a 

 fold rather than a ridge and in some cases 

 does not connect all three rays of the 

 tetrad. The rays, however, never pass 

 beyond the marking. 



Holotype. — Maceration 625-A Slide 2, 

 Willis coal bed, Gallatin County, Illinois. 



Discussion. — Species of Punctati-sporites 

 which possess arcuate markings or even 

 suggest their presence add a new character 

 to the genus. It is possible that the folds 

 or markings are of arcuate origin. 



Punctati-sporites reticuloides sp. nov. 



Plate 1, figure 7 



Description. — Spores are radial, trilete, 

 roundly triangular to spherical in shape and 

 generally slightly obliquely compressed. 

 Holotype measures 50.4 X 52.5 microns, 

 and the known size range is from 45 to 61 

 microns. The spore coat is ornamented 

 with punctations of varying size. Where 

 several pits merge to form one large punc- 

 tation the spore coat appears reticulate. 

 The single pits or punctations vary in size 

 from 1.75 to 2.5 microns and the larger 

 punctations (several combined (?) punc- 

 tations) have measured more than 5 mi- 

 crons. The trilete rays are always present 

 although frequently not distinct because of 

 the ornamentation. The rays range in 



length from 12 to 16 microns. The thick- 

 ness of the spore coat is difficult to measure 

 but probably does not exceed 2.5 microns. 



Holotype.— Maceration 579-A Slide 1, 

 No, 2 coal bed, Bureau County, Illinois. 



Discussion. — P. reticuloides sp. nov. cer- 

 tainly approaches the reticulate ornamenta- 

 tion which characterizes the genus Reti- 

 culati-sporites. The ornamentation is, 

 however, punctate, but further suggests a 

 relationship with Reticulati-sporites. 



Punctati-sporites triangularis sp. nov. 



Plate 2, figure 7 



Description. — Spores are radial, trilete, 

 broadly roundly triangular, and with 

 occasional folds. The holotype measures 

 63 to 65 microns, and the known size range 

 is from 58 to 74 microns. The spore coat 

 is indistinctly to distinctly punctate. The 

 punctations are numerous and somewhat 

 variable in size. The trilete mark is usually 

 distinct and, due to oblique compression, it 

 is frequently found at one side of the spore. 



The rays are fairly uniform in length, 

 ranging from 22 to 23.5 microns. The 

 commissure is somewhat developed and the 

 lips are almost lacking. The spore coat is 

 more than 2 microns but less than 3 mi- 

 crons thick. 



Holotype.— Maceration 474-A Slide 1, 

 No. 6 coal bed, Franklin County, Illinois. 



Discussion. — P. triangularis sp. nov. 

 might be conspecific with P. granifer (Ibra- 

 him) S. W. and B., 1944, however Ibra- 

 him's description precludes this possibility 

 since his species is not punctate. 



Punctati-sporites vagus sp. nov. 



Plate 16, figure 4 



Description. — Spores are radial, trilete, 

 and spherical in shape; folding of the spore 

 coat is rare except for an occasional pe- 

 ripheral fold. The holotype measures 65 X 

 63 microns, and the known size range is 

 from 61 to 67 microns in the largest di- 

 ameter. The spore coat is punctate and the 

 punctations are about one micron in di- 

 ameter. The trilete rays are rather vague 

 although generally discernible on all speci- 



