Sorophores of Lygodium Sw. (Schizaeaceae) from the Late Cretaceous of New Jersey

被引:24
作者
Gandolfo, MA [1 ]
Nixon, KC [1 ]
Crepet, WL [1 ]
Ratcliffe, GE [1 ]
机构
[1] Cornell Univ, Dept Plant Biol, L H Bailey Hortorium, Ithaca, NY 14853 USA
关键词
Late Cretaceous; Turonian; fossil fern; Lygodium; Schizaeaceae; sorophores;
D O I
10.1007/BF01086385
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
We report here on a series of specimens of charcoalified sorophores with characteristics of the extant fern genus Lygodium (Schizaeaceae) collected from sediments of the Raritan Formation (Late Cretaceous). Each elongate lobed fertile pinnule (sorophore) is flattened and bears alternately arranged sporangia on one surface. Each sporangium is covered by an indusium continuous with the margin of the lamina. Sporangia are oblong in shape, short stalked, and have an apical annulus formed by a single ring of radiating cells that dehisces longitudinally. The 'sporangial cap' or 'distal face' is formed by only one cell. All of these features are characteristic of the extant genus Lygodium. Small numbers of trilete, psilate spores are found in the sporangia. Megafossils assignable to Lygodium are known from the Upper Cretaceous of North America and Germany with worldwide distribution during the Tertiary. The new Lygodium fossils are compared with others previously referred to the genus.
引用
收藏
页码:113 / 123
页数:11
相关论文
共 47 条
[1]  
ALTON AHG, 1959, REINWARDTIA, V5, P11
[2]  
[Anonymous], 1961, YORKSHIRE JURASSIC F
[3]  
Bhattacharyya A., 1991, Indian Fern Journal, V8, P15
[4]  
Bierhorst DW, 1971, MORPHOLOGY VASCULAR
[5]   The development of the sporangium of lygodium - Contributions from the Hull botanical laboratory, 101 [J].
Binford, R .
BOTANICAL GAZETTE, 1907, 44 :0214-0224
[6]  
BOLCHOVITINA N A, 1971, Journal of Palynology, V7, P9
[7]  
Bolchovitina N. A., 1961, T GEOL I AKAD NAUK S, V40, P1
[8]  
Bower FO., 1926, FERNS FILICALES, V2
[9]  
Brenner G.J., 1963, B MD DEP GEOL MINES, V27, P1
[10]  
Brown Roland W., 1943, JOUR WASHINGTON ACAD SCI, V33, P141