Pinus susquaensis
| Pinus susquaensis Temporal range: Early Cretaceous
| |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Pinophyta |
| Class: | Pinopsida |
| Order: | Pinales |
| Family: | Pinaceae |
| Genus: | Pinus |
| Species: | †P. susquaensis
|
| Binomial name | |
| †Pinus susquaensis Dawson
| |
Pinus susquaensis is an Early Cretaceous pine species known from the Western United States.[1][2] It is one of the oldest pine trees in North America besides Pinus longifolius.
References
[edit]- ^ Simmons, George C. (1957-11-01). "Contact of Burro Canyon Formation with Dakota Sandstone, Slick Rock District, Colorado, and Correlation of Burro Canyon Formation1". AAPG Bulletin. 41 (11): 2519–2529. doi:10.1306/0BDA59B7-16BD-11D7-8645000102C1865D. ISSN 0149-1423.
- ^ Ward, L.F. (1899). "The Cretaceous formation of the Black Hills as indicated by the fossil plants. Cretaceous Formation of the Black Hills". Washington, Govt. Print. Off.
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