Beckspringia communis Licari

Plant Fossil Names Registry Number: PFN000269


Author: G. R. Licari

Rank: species

Reference: Licari, G. R. (1978): Biogeology of the late pre-Phanerozoic Beck Spring Dolomite of eastern California. – Journal of Paleontology 52(4): 767–792.

Page of description: 779

Illustrations or figures: pl. 1, figs 3–6, ?7

Name is type for


Holotype n/n, Biogeology Clean Laboratory, University of California, Santa Barbara, California, USA
Figures: pl. 1, fig. 6

Note: Licari (1978): The holotype is located on thin section C250(39) from the Cloud Collection. Coordinates (21.4, 11.1).

Original diagnosis/description

Trichomes as described for the genus but of relatively small diameter (mean 2.5 μm of 109 trichomes measured) and possessing heterocyst-like cells. Morphologic characteristics are given in Table 2.


Refers to the great abundance of the small diameter trichomes.


Proterozoic, Mesoproterozoic
The fossiliferous outcrops occur 2,900 m below the lowest metazoan trace fossils, are younger than 1.7 b.y. and are correlated to the Apache Group of Arizona, bracketed between radiometric ages of 1.2 and 1.4 b.y.


United States
Locality 3 of 8/11/68 – Black laminated chert from partially silicified stromatolites within the top one meter of exposed outcrop of the Beck Spring Dolomite on the north slope of the Kingston Range, south side of road 0.5 km east-southeast of Horse Thief Springs, north-eastern San Bernardino County, California. Unsurveyed NE¼ sec. 2, T19N, R10E, of Horse Thief Springs Quadrangle, California-Nevada (1:62,500). Elevation about 1,344 m.

Plant fossil remain

cyanobacteria and other prokaryotes


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