CARBONDALE GROUP 



75 



17. E. sp. 



18. Triguitrites protensus sp. nov.* 



19. T. fulvinatus sp. nov. 



20. T. spinosus Kosanke, 1943 



21. T, sp. 



22. Calamospora breviradiata sp. nov. 



23. C. hartungiana Schopf, 1944 



24. C. sp. 



25. Lycospora punctata sp. nov. 



26. L. granulata sp. nov. 



27. Raistrickia protensa sp. nov. 



28. /?. crinita sp. nov. 



29. /?. imbricata sp. nov. 



30. /?. aculeolata, 1944** 



31. #. grovensis Schopf, 1944 



32. Florinites sp. 



33. Wilsonia delicata sp. nov. 



34. "Spherites" sp. 



35. Gen. nov. (see 5-A coal bed) 



The correlation of the Grape Creek coal 

 bed with the Herrin (No. 6) coal bed is 

 based upon the presence of the same genera 

 at all localities investigated (Table 2). 

 Although two species discrepancies are re- 

 corded, both are exceedingly rare. Granu- 

 lati-sporites has not been found below the 

 blue band in any of the coals examined, 

 which is the only genus zonation observed. 

 This is in contrast to the conspicuous zona- 

 tion in both the No. 2 and No. 5 coal beds. 



The No. 6 coal bed is readily identified 

 and may be distinguished from the beds be- 

 low and above it by its spore content. 

 Punctati-sporites triangularis sp. nov., and 

 Wilsonia delicata sp. nov. are known only 

 from No. 6 and coal beds above. Raistrickia 

 protensa sp. nov. and R. grovensis Schopf, 

 1944, are known only from No. 6 and coal 

 beds below, while R. imbricata sp. nov. is 

 known only from the No. 6 coal bed. 



Genera distribution and abundance varia- 

 tions have been determined for the various 

 benches of the coal bed (Table 2). Laevi- 

 gato-sporites and Lycospora are of approxi- 

 mately equal dominance in Franklin and 

 Vermilion counties with each genus com- 

 prising 30 to 35 percent of the total spore 

 content, the two thus comprising 60 to 70 

 percent of the total population. In these 

 two counties Punctati-sporites is next in 

 numerical importance with approximately 

 13 percent for Franklin County and eight 

 percent for Vermilion County. In Fulton 

 County, from the type Brereton cyclothem 



* Has not been observed from Franklin County (Herrin). 

 ** Has not been observed from Vermilion County 

 (Grape Creek). 



exposure (maceration 524, 540) only the 

 top four inches above the upper shale parting 

 has Laevigato-sporites and Lycospora as the 

 dominant genera, with 25 to 30 percent of 

 the spore population recorded for each of 

 the genera. However, Punctati-sporites 

 comprises 20 to 25 percent of the total 

 spore population. Below the upper four 

 inches, Punctati-sporites is dominant and 

 Laevigato-sporites and Lycospora are sub- 

 dominant with 15 to 20 percent of the total 

 population for each genus. Below the blue 

 band, Wilsonia gen. nov. reaches a maxi- 

 mum abundance for the genus. 



It is therefore possible that whereas the 

 coal bed from three counties contains the 

 same genera and, with minor exceptions, the 

 same species, there exists a considerable 

 variation in the abundance of the genera in 

 Fulton County as contrasted to Franklin 

 and Vermilion counties. This suggests that 

 the No. 6 coal bed in Fulton County is de- 

 rived more largely from the parent plants 

 of Punctati-sporites than No. 6 coal bed 

 in Franklin and Vermilion counties. 



Laevigato-sporites pseudothiessenii sp. 

 nov. is the most abundant species of the 

 genus in Franklin and Vermilion counties 

 and usually it comprises two-thirds to three- 

 fourths of all the species of the genus. In 

 Vermilion County it makes up 66 percent 

 of the genus and 26 percent of all species 

 counted. The proportions are somewhat 

 higher in Franklin County. In Fulton 

 County the proportions are entirely dif- 

 ferent since L. pseudothiessenii sp. nov. is 

 not the most abundant species of the genus. 

 It is only 14 percent of the species of Laevi- 

 gato-sporites and is less than three percent 

 of all the species counted. Both L. des- 

 moinensis (Wilson and Coe) S. W. and B., 

 1944, and L. minutus (Ibrahim) S. W. and 

 B., 1944, exceed L. pseudothiessenii sp. nov. 

 in abundance. 



Lycospora granulata sp. nov. makes up 

 over 90 percent of species of the genus and 

 36 percent of the total of all species in 

 Vermilion County. It is somewhat less 

 abundant in Franklin County where it is 

 slightly exceeded in quantity by L. pseudo- 

 thiessenii sp. nov. At the type Brereton 

 cyclothem exposure in Fulton County Lyco- 



