Further evidence supporting high diversity of cyathealean tree ferns in the Early Cretaceous of Antarctica

• Published in: Cretaceous Research
• Main Author: Vera, Ezequiel Ignacio
• Format: Article in Journal/Newspaper
• Language: English
• Published: Academic Press Ltd - Elsevier Science Ltd
• Subjects: ANTARCTICA; CERRO NEGRO FORMATION; CIBOTIACEAE; CYATHEACEAE; CYATHEALES; FOSSILS; LOWER CRETACEOUS; TREE FERNS; https://purl.org/becyt/ford/1.5; https://purl.org/becyt/ford/1; https://purl.org/becyt/ford/1.6; South Shetland Islands; Argentino; Argentina; Cerro Negro; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/11336/85080

Two new specimens of a cyathealean fern stems collected from the Lower Cretaceous (Aptian) Cerro Negro Formation, which crops out at the South Shetland Islands, Antarctica, are described in detail. The specimens are dictyostelic stems with U-shaped meristeles without sclerenchyma sheaths and petiole...