Fossil ceratophyllum (Ceratophyllaceae) from the Tertiary of North America

P. S. Herendeen; D. H. Les; D. L. Dilcher

doi:10.2307/2444787

Fossil ceratophyllum (Ceratophyllaceae) from the Tertiary of North America

P. S. Herendeen, D. H. Les, D. L. Dilcher

Program in Biological Sciences-Chicago Botanic Garden

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Fossil fruits and a vegetative axis assignable to the extant genus Ceratophyllum are described from four North American Tertiary localities. Fossil fruits assignable to the extant species C. muricatum and C. echinatum are reported from the Eocene Green River and Claiborne formations, and the Miocene Esmerelda Formation, respectively. An extinct species, C. furcatispinum, is described from the Paleocene Fort Union Formation and represents the oldest published report of Ceratophyllum in the fossil record. The existence of extant angiosperm species in the Eocene is very unusual and may be attributable in this case to slow evolutionary rates and unusual evolutionary properties associated with hydrophily in the genus Ceratophyllum. -Authors

Original language	English (US)
Pages (from-to)	7-16
Number of pages	10
Journal	American Journal of Botany
Volume	77
Issue number	1
DOIs	https://doi.org/10.2307/2444787
State	Published - Jan 1 1990

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Genetics
Plant Science

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abstract = "Fossil fruits and a vegetative axis assignable to the extant genus Ceratophyllum are described from four North American Tertiary localities. Fossil fruits assignable to the extant species C. muricatum and C. echinatum are reported from the Eocene Green River and Claiborne formations, and the Miocene Esmerelda Formation, respectively. An extinct species, C. furcatispinum, is described from the Paleocene Fort Union Formation and represents the oldest published report of Ceratophyllum in the fossil record. The existence of extant angiosperm species in the Eocene is very unusual and may be attributable in this case to slow evolutionary rates and unusual evolutionary properties associated with hydrophily in the genus Ceratophyllum. -Authors",

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AU - Dilcher, D. L.

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AB - Fossil fruits and a vegetative axis assignable to the extant genus Ceratophyllum are described from four North American Tertiary localities. Fossil fruits assignable to the extant species C. muricatum and C. echinatum are reported from the Eocene Green River and Claiborne formations, and the Miocene Esmerelda Formation, respectively. An extinct species, C. furcatispinum, is described from the Paleocene Fort Union Formation and represents the oldest published report of Ceratophyllum in the fossil record. The existence of extant angiosperm species in the Eocene is very unusual and may be attributable in this case to slow evolutionary rates and unusual evolutionary properties associated with hydrophily in the genus Ceratophyllum. -Authors

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Fossil ceratophyllum (Ceratophyllaceae) from the Tertiary of North America

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