14 ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 445 



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

 line, and seldom folded. The commissure and trilete rays are very indistinct due 

 to the nature of the ornamentation. The rays are straight, lack lips, and extend 

 about two-thirds the distance to the margin. The exine is covered with spines up 

 to 3 \i long, but their size varies considerably. They are one to two times as long 

 as they are wide, and many are curved. They are not evenly distributed but are 

 generally 2 to 3 n apart. Between 40 and 60 spines are at the spore margin. The 

 exine has an over-all shaggy appearance and is about 1 |i thick. Size range (10 

 specimens): 38.7 to 46.5 \±; median, 42.3 |jl. 



Comparison. — A comparison between the Illinois spores and the ones studied 

 by Naumova is difficult because of the brevity of her description. According to the 

 emendation of Acanthotriletes by Potonie' and Kremp (1954), the spines on these 

 spores should be at least twice as long as they are wide. However, the spines 

 on the Illinois specimens are seldom that long, and Naumova (1953) did not state 

 the dimensions of the spines on her spores. 



Genus EMPHANISPORITES McGregor, 1961 

 Type species. — E_. rotatus McGregor, 1961 



Emphanisporites rotatus McGregor, 1961 

 Plate 4, figure 9 



Genus LYCOSPORA (Schopf, Wilson, and Bentall) Potonie' and Kremp, 1954 



Type species. — L^. micropapillata (Wilson and Coe) Schopf, Wilson, and 

 Bentall, 1944. 



Lycospora pseudomagnifica Peppers sp. nov. 

 Plate 4, figures 10-12 



Description. — The spores are radial, trilete, and roundly triangular when 

 viewed in proximal -distal orientation. They are rarely folded, but the proximal 

 spore surface is sometimes torn. The margin is straight to irregularly undulating. 

 The commissure is visible, and the trilete rays are simple, occasionally undula- 

 ting, and extend to the inner margin of the cingulum. A prominent, continuous flange 

 or cingulum extends from the proximal surface just poleward of the equator. The 

 cingulum is 5 to 9 |jl wide and is unornamented. The proximal surface of the spore 

 is laevigate, but the distal surface is covered with low, elongated verrucae that 

 are closely spaced and in places are joined or partly joined to form short ridges. 

 The verrucae are 3 to 5 (jl in diameter and extend about 2 [ji above the spore surface. 

 Spines and grana are absent. The proximal surface is about 2.5 \± thick, and the 

 distal surface is about 4 \± thick. Size range (14 specimens): 5 8.5 to 83.2 \±, in- 

 cluding cingulum; median, 67.3 (jl. 



Holotype. — Plate 4, figure 10; maceration 1510, slide 21, coordinates 

 138.6 x 37.5; size, 69.9 by 58.5 [l. 



