Occurrence and Paleoecology of Marsilea from the Eocene Wasatch Formation, Johnson County, Wyoming

Rich, Fredrick J.; Johnson, David M.; Durkin, Thomas V.

doi:10.2307/3515633

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“…Isolated petals of fossil flowers are frequent in Cretaceous fossil records and are often mistaken for aquatic ferns such as Marsilea Linnaeus (Skog and Dilcher, 1992;Nagalingum, 2007). Petals of the fossil flowers can be distinguished from the Marsilea and extinct Marsileaceaephyllum Nagalingum (2007) by the variation in size, thickness of the veins, and the irregularly sized, rectangular, or polygonal areoles (Rich et al, 2001). The large size of the segments (petals) and the thick first-order veins suggest the affinity with petals rather than Marsilea or Marsileaceaephyllum.…”

Section: Locality and Age Ramanujapuram Raghavapuram Formation Easmentioning

confidence: 99%

Angiosperms from the Early Cretaceous sediments of India

Chopparapu¹,

Rajanikanth²,

Kavali³

et al. 2020

Geol. USP. Sér. Cient.

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This study presents the first report of angiosperm macrofossil assemblage from the Early Cretaceous sediments of India, containing a fruit, a spike, a petal, leaves, and an axis from the Krishna Godavari Basin. This assemblage provides clues to angiosperm evolution and ecology during the Early Cretaceous of India. The described enigmatic forms are comparable to fruits of Trapa, and palm leaves and spikes of Potamogeton. The fossil material also includes ribbon-like leaves with a small axis; fossil remains suggest affinity with the monocotyledon group and support recent morphological and molecular phylogenetic studies to establish the divergence of this group from dicotyledons, during the early Cretaceous. Fossils described in the present study suggest an affinity for an aquatic environment that appears to be ideal for some early angiosperms.

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