Museum Homepage

The San Mateo County Historical Association
Online Collections Database

The mission of the San Mateo County Historical Association is to inspire wonder and discovery
of the cultural and natural history of San Mateo County.

Object Record

  • Email This Page
  • Send Feedback
Catalog Number 2014.009.028
Description Scutellaster sp., sand dollar fossil dating from between 1.5 million years ago to .75 million years ago commonly found at low tide in littoral (sandy and muddy bottom) or sub-littoral (open bay, muddy marine) zones. Fossil specimen is oval with a slightly rounded top surface and flat bottom surface. Overall sandy gray hue with raised, lighter-colored markings on top. Markings radiate out toward the edges of the shell. Underside surface has shell fragments scattered throughout.
Object Name Shell, Animal
Collection 3D - Paleontology
Title Scutellaster sp., Sand Dollar Fossil, 1.5-.75 Ma
Date 1.5 - .75 Ma
Kingdom Animalia (Animals)
Phylum Echinodermata (Echinoderms)
Class Echinoidea (Urchins)
Order Clypeasteroida (Sea urchins)
Family Echinarachniidae (Sand dollars)
Genus Scutellaster
Species sp.
Inscription Text none
Provenance Fossils taken from Merced Formation collected at Westborough Boulevard at Highway 280 in the late 1970s or early 1980s. (See Yancey 1978, Fig. 2: Artifacts taken from E Stratified Section/D-5929). Most specimens (especially clams) in this collection are not extinct and can still be found in the Bay Area.
Notes Retired Geologist Ken Lajoie identified on 4/8/2014.
Dimensions H-0.5 W-1.75 D-1.5 inches
Search Terms Fossils
Merced Formation
South San Francisco
Subjects Fossils
Marine biology