16 



PENNSYLVANIAN SPORES OF ILLINOIS 



of the iris diaphrams is it possible to dis- 

 tinguish the punctations. The trilete rays 

 are distinct, the lips are slightly developed, 

 and the commissure is thin. The rays 

 average nine microns in length, and the 

 spore coat is one to 1.5 microns thick. 



Holotype.— Maceration 584 Slide 7, 

 Woodbury ( ?) coal bed, Jasper County, 

 Illinois. 



Discussion. — This species is the smallest 

 yet assigned to the genus Punctati-sporites. 

 It resembles P. parvipunctatus Kosanke, 

 1943, but is smaller and has a thinner spore 

 coat. 



Punctati-sporites mundus sp. nov. 



Plate 2, figure 8 



Description. — Spores are radial, trilete, 

 roundly triangular with occasional irregu- 

 larly placed folds. The folds sometimes occur 

 along the margin of the spore coat. The 

 holotype measures 61 X 58.8 microns, and 

 the known size range is from 54 to 72 

 microns. The spore coat is ornamented 

 with medium sized punctations which are 

 not always clearly evident. The trilete 

 mark is distinct as are the lips and commis- 

 sure. The rays are of relatively uniform 

 length, measuring from 16 to 19 microns on 

 the holotype. The spore coat measures 

 from 2 to 2.5 microns in thickness. 



Holotype. — Maceration 486-B Slide 17, 

 Friendsville coal bed, Wabash County, 

 Illinois. 



Discussion. — P. mundus sp. nov. is very 

 similar to Knox's type 7K, 1942, p. 101. 

 P. mundus probably has a coarser ornamen- 

 tation. A form conspecific with 7K has 

 been observed in No. 8 coal bed in limited 

 number. 



Punctati-sporites obliquus sp. nov. 



Plate 2, figure 5 



Description. — Spores are radial, trilete, 

 oval to spherical in outline and frequently 

 obliquely compressed as exhibited by the 

 holotype specimen. Folding of the spore 

 coat occurs, often cresent-shaped, somewhat 



parallel to the margin of the spore coat. 

 The holotype measures 34.6 X 39.8 microns 

 and the known size range is from 31 to 46 

 microns. The spore coat is very minutely 

 punctate and the punctations are closely 

 spaced which tends to give the spore coat a 

 minutely papillate ornamentation. The 

 punctations are round and less than one 

 micron in width. The trilete mark is 

 distinct, with lips and commissure. The 

 rays are not triangularly spaced as shown on 

 the holotype specimen PL 2, fig. 5. The 

 spore coat is 1.25 to 1.5 microns thick. 



Holotype. — Maceration 603-B Slide 5, 

 No. 2 coal bed, Fulton County, Illinois. 



Discussion. — In some cases one of the 

 trilete rays is indistinct. This tends to 

 cause confusion in identification with a 

 species of Laevigato-sporites , but by proper 

 focusing usually a faint trace of the third 

 ray can be detected. 



Punctati-sporites orbicularis sp. nov. 



Plate 2, figure 9 



Description. — Spores are radial, trilete, 

 originally spherical in shape and compressed 

 into a disc. Folds are rare and the holo- 

 type specimen measures 37.8 X 37.8 mi- 

 crons, and the known size range is from 35 

 to 44 microns. The spore coat is finely punc- 

 tate and the punctations are very closely 

 spaced. The trilete mark and commissure 

 are distinct. The lips are slightly developed. 

 The rays are usually of uniform length 

 and average 12 to 13 microns in length. 

 The spore coat measures 2 to 2.5 microns 

 in thickness which is relatively thick for 

 spores of this size of the genus. 



Holotype.— Maceration 542-A Slide 7, 

 No. 8 coal, Peoria County, Illinois. 



Discussion. — Spores of this type of charac- 

 ter are common. P. parvipunctatus Kosanke 

 from the Pomeroy coal bed in Ohio is 

 similar in size and shape but is more finely 

 punctate. P. globosus (Loose) S. W. and 

 B., 1944, is also similar but appears to be 

 larger and have a coarser ornamentation. 

 Type B (; of Raistrick and figs. 41 and 42 

 of Knox (1939) are also similar to P. 

 orbicularis sp. nov. 



