GENUS PUNCT/ITI-SPORITES 



15 



PUNCTATI-SPORITES SETULOSUS Sp. nov. 

 Plate 2, figure 1 



Description. — Spores are radial, trilete, 

 and essentially spherical in shape. Fre- 

 quently there is a small fold on the proximal 

 surface of the spore coat. The holotype 

 measures 73.5 X 73.5 microns, and the 

 known size range is from 68 to 79 microns. 

 The spore coat has numerous short blunt 

 setae slightly more than 3 microns in length 

 and from 1.5 to 2.5 microns in width. The 

 setae cover both the proximal and distal 

 surfaces. The trilete rays are distinct 

 while the lips and commissure are faintly 

 discernible on most specimens. One of the 

 rays is frequently longer than the other 

 two. The rays of the holotype vary in 

 length from 16 to 24 microns. The spore 

 coat averages 2 microns in thickness ex- 

 cluding the setae. 



Holotype. — Maceration 500-C Slide 2, 

 a coal bed at 227 to 228 feet (Shoal Creek?) 

 in the Central Pipe Line — Liddk No. 1 well 

 in Wabash County, Illinois. 



Discussion. — This species is distinct from 

 all known species of the genus by the 

 presence of numerous short setae. These 

 are suggestive of the ornamentation found 

 in the genus Raistrickia excepting for the 

 fact that the setae of P. setulosus are very 

 short. 



PUNCTATI-SPORITES FENESTRATUS sp. nov. 



Kosanke and Brokaw 



Plate 2, figure 10 



Description. — Spores are radial, trilete, 

 spherical in shape and the outline is some- 

 times slightly crenulate due to folds. The 

 holotype measures 77.7 X 79.8 microns and 

 the known size range is from 68 to 85 

 microns. The spore coat is distinctly punc- 

 tate, the punctations are closely spaced and 

 do not exceed three microns. The pits are 

 round to oval. The trilete mark is not 

 distinct, in fact, the spores appear alete and 

 only through careful focusing is it possible 

 to discern the trilete mark. Some specimens 

 suggest the presence of arcuate markings 

 but it has not been possible to prove this 

 point because of the ornamentation. The 



spore coat is from three to five microns thick. 



Holotype. — Maceration 474-A Slide 3, 

 No. 6 coal bed, Franklin County, Illinois. 



Discussion. — P. fenestratus sp. nov. is 

 similar to P. foveatus sp. nov. but distinct 

 from it by having smaller and more closely 

 spaced punctations. Further, the trilete 

 mark is less distinct. 



PUNCTATI-SPORITES FOVEOSUS Sp. nov. 

 Plate 2, figure 3 



Description. — Spores are radial, weakly 

 trilete, spherical in shape and generally 

 obliquely compressed. Holotype measures 

 from 111 X 107 microns and the known 

 size range is from 90 to 115 microns. The 

 spore coat is covered with large punctations 

 which suggests a transition type of ornamen- 

 tation between punctate and reticulate types. 

 The punctations or pits vary in width from 

 two to 12 microns and penetrate the spore 

 coat from 1.75 to 2.5 microns. The areas 

 between pits average slightly more than four 

 microns. The trilete mark is weakly devel- 

 oped and frequently difficult to observe 

 owing to the ornamentation and oblique 

 compression. The spore coat is often torn 

 along one or more of the rays. The spore 

 coat is usually at least three microns thick. 



Holotype.— Maceration 486-B Slide 17, 

 Friendsville coal bed, Wabash County, 

 Illinois. 



Discussion. — The large punctations cer- 

 tainly vaguely resemble the lacunae of some 

 species of Reticulati-sporites but the sculp- 

 turing is definitely punctate. The relation- 

 ship between the two types is clear. Knox's 

 figure 113 (1938, p. 462) closely resembles 

 this species although it appears to be slightly 

 smaller in size. 



PUNCTATI-SPORITES MINUTUS sp. nOV. 

 Plate 16, figure 3 



Description. — Spores are radial, trilete, 

 originally spherical in shape with the spore 

 coat variously folded. The holotype meas- 

 ures 29.4 X 28.7 microns and the known 

 size range is from 27.3 to 32.5 microns. The 

 spore coat is minutely punctate, but only 

 with careful focusing and proper adjustment 



