12 ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 445 



ornamentation is finer. The spore coat is about 2 \x thick. The diameter is 70.5 

 by 61.8 (jl. 



Genus APICULATASPORITES (Ibrahim) Smith and Butterworth, 1967 

 Type species.— A. spinulistratus (Loose) Ibrahim, 1933. 



Apicu lata s porite s wapsipiniconensis Peppers sp 

 Plate 4, figures 1-2; text figure 4A 



nov 



Description. — The spores are radial, trilete, and circular to subcircular in 

 outline but are almost always folded. The distinct rays are somewhat sinuous and 

 extend about two-thirds the distance to the spore margin. The commissure is bor- 

 dered by lips up to 2 p. wide. The exine is ornamented with cones or spines that 

 are one to two times as long as they are wide; the longest are mostly sharply point- 

 ed and bent but are occasionally broken at the ends. The basal diameter of the 

 projections and the spacing between them is less than 1 \i; between 120 and 140 

 can be counted at the spore margin. The spore coat is 1 to 2 n thick. Size range 

 (15 specimens): 64.7 to 98.8 \±; median, 77 \i, 



Holotype. — Plate 4, figure 1; maceration 1548, slide 3, coordinates 140.0 

 x 51.6; size, 73.8 by 69.9 \x. 



Paratype. — Plate 4, figure 2; 

 maceration 1510, slide 2, coordinates 

 127.6 x 45.1; size, 71.5 by 61.8 ji. 



Comparison. — Apicu lata sporites 

 wapsipiniconensis compares most close- 

 ly to A, dilucidus (McGregor) McGregor, 

 1964, but the latter has a smaller size 

 range (5 to 69 \±) , is seldom folded, 

 and has fewer (75 to 124) projections at 

 the margin that are apparently shorter 

 than those on A. wapsipiniconensis . 

 McGregor (1964, p. 14-15) discussed 

 other species that are somewhat similar 

 to A., dilucidus . 



Etymology. — The specific epi- 

 thet is named for the Wapsipinicon Lime 

 stone. 



Apiculatas porite s davenportensis 



Peppers sp. nov. 



Plate 4, figures 3-4; text figure 4B 



radial 



Description. — The spores are 

 trilete, and elliptical to circular 



^X- 



O 



g o°g° O oVo O > 



o 



va;a a /7 



10 /x 



Text fig. 4 - Portions of spore exine s to 

 show ornamentation of (A) Apiculata - 

 s porite s wapsipiniconensis , (B) A. 

 davenportensis , and (C ) A_. dewitten - 

 sis. 



