ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 492 



T 



A B C D 



Text fig. 4 - Configuration of vascular bundle in leaf scars of 

 Artisophyton and the supposed developmental sequence of the leaf 

 scars in the basal part of the rachis. (A is proximal.) 



and descriptions of the vegetable remains found in a fossil state in 

 this country: London, James Ridgway, v. 2, pi. 116. 



Artisophyton goldehbergii (Weiss, 1860) comb. nov. 



Basionym : Megaphytum goldenbergii Weiss, E. , 1860, Ueber ein 

 Megaphytum der Steinkohlen-Formation von Saarbriicken: Zeitschrift der 

 deutschen geologischen Gesellschaf t , v. 12, figure on p. 510. 



Artisophyton insignis (Lesquereux, 1866) comb. nov. 

 Text fig. 3, C; pi. 5, fig. 2; pi. 6, figs. 2 and 3 



Basionym : Caulopteris insignis Lesquereux, L., 1866, An enumer- 

 ation of the fossil plants found in the coal measures of Illinois, with 

 description of the new species, pi. 49, fig. 1, p. 459; in: Worthen, 

 A. H. , 1866, Palaeontology: Geological Survey of Illinois, v. 2. 



Partial synonymy : 



1866 Caulopteris insignis Lesquereux 

 1890 Megaphyton insignis Grand' Eury 

 1940 Megaphyton insignis Janssen, pi 

 1958 Megaphyton insignis Langford, p 

 1970 Caulopteris sp., Darrah, pi. 68, fig. 



21 



135, fig. 240 

 1 



(For a more complete pre- 1940 synonymy, see Janssen, 1940.) 



Holotype : ISM 1720 



Specimens : ISGS PB-3299, ISM 14555, ISM 15290, ISM 15740, 

 PP 730, PP 2936 (? 2583), Harvard 7720 (= S 63) 



Occurrences : Energy Shale Member (shale above Herrin (No. 6) 

 Coal Member), Carbondale Formation; Francis Creek Shale Member (shale 

 above Colchester (No. 2) Coal Member), Carbondale Formation; ? shale 

 above Murphysboro Coal Member, Spoon Formation. 



