Credneria

Credneria is an extinct genus in the family or Platanaceae of broad-leaf trees similar to extinct Platanus species that appeared during the Cretaceous. The genus was first described by Jonathan [Carl Zenker|Zenker] and has formerly been placed in the family Salicaceae rather than Platanaceae on occasion. Credneria leaves are preserved in sandstone and less often in siltstone. The leaves are typically obovate with a pinnate-actinodromous venation and distinct suprabasal veins.

Species

Known species are:

Credneria biloba
Credneria bohemica
Credneria comparabilis
Credneria cuneifolia
Credneria daturaefolia
Credneria denticulata
?Credneria grewiopsoides
Credneria integerrima
?Credneria longifolia
Credneria pachyphylla
Credneria parva
Credneria prophylloides
Credneria pulchra
?Credneria spatiosa
Credneria subserrata
Credneria subtriloba
Credneria sudanense
Credneria triacuminata

The species Crednetia basinervosa, C. elegans, C. inordinata, C. intermedia, C. mixta, and C. truncatodenticulata have all been identified as junior synonyms of the platanaceous species Pseudoprotophyllum boreale. The species Credneria grewiopsoides, C. longifolia and C. spatiosa from the Cenomanian Melozi and Kaltag formations along the Yukon River in Alaska are also possibly representatives of Pseudoprotophyllum boreale, but the known fossil material for the species was considered too incomplete to make a determination.