Sagenopteris is a genus of extinct seed ferns from the Triassic to late Early Cretaceous.

Description

Sagenopteris has palmately arranged leaves with anastomosing venation. Different organs attributed to the same original plant can be reconstructed from co-occurrence at the same locality and from similarities in the stomatal apparatus and other anatomical peculiarities of fossilized cuticles.

Species

The following species have been described:

Distribution

Fossils of Sagenopteris have been registered in: Argentina, China, Germany, Greenland, Italy, Japan, Kyrgyzstan, the Russian Federation, Sweden, Tajikistan, Ukraine, United States (Virginia, Virginia/North Carolina). Afghanistan, Antarctica, Argentina, Azerbaijan, Belarus, Canada (British Columbia, Yukon), China, Colombia (Valle Alto Formation, Caldas), Georgia, Germany, Greenland, India, Iran, Italy, Japan, Kazakhstan, Kyrgyzstan, Mexico, Peru, Poland, Romania, the Russian Federation, Tajikistan, Turkmenistan, Ukraine, the United Kingdom, United States (Alaska, Montana, Oregon/Idaho), and Uzbekistan. Spain, Belgium, Canada (British Columbia and Alberta), Greenland, the Russian Federation, and the United States (Montana).