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- Rare specimens
- Species: Macraster Texanus, Roemer
- Size Length: 4.0 inches, ( 10.16 centimeters ) Height: 2.0 inches, ( 5.08 centimeters ), Width: 3.75 inches, ( 9.525 centimeters )
- Weight: 1.228 pounds (558 grams)
- Collecting Site: Timberbrook Construction site
- Locality: Denton County, Justin, Texas
- Formation: Washita Group, Fort Worth Formation
- Age: 95 - 99 Million Years old
- Note: Top of fossil echinoid has oyster shells, serpula worm tubes attached randomly.
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- Species: Holaster Simplex
- Size Length: 2.5 inches, (6.35 centimeters), Height: 1.87 inches, (4.75 centimeters), Width: 1.87 inches, (4.75 centimeters)
- Weight: 0.364 pounds (165 grams)
- Collecting Site: Timberbrook construction site
- Locality: Denton County, Justin, Texas
- Formation: Fort Worth Formation
- Age: 100 Million Years old
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- Species: Hemiaster Bexari ( three sample set )
- Size Diameter: Approx. .375 inches
- (0.95 centimeters)
- Weight: < .25 pounds (113 grams)
- Collecting Site: Road Cut location
- Locality: Brexar County, Texas
- Formation: Corsicana Formation
- Age: 68 Million Years old
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- Species: Hemiaster Bexari ( three sample set )
- Size Diameter: Approx. .375 inches
- (0.95 centimeters)
- Weight: < .25 pounds (114 grams)
- Collecting Site: Road Cut location
- Locality: Brexar County, Texas
- Formation: Corsicana Formation
- Age: 68 Million Years old
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- Species: Hemiaster whitei ( Three sample set )
- Size Diameters: 0.375 -1.0 inches
- (0.95 - 2.54 centimeters)
- Weight: 0.198 pounds (90 grams)
- Collecting Site: Oliver Creek
- Locality: Denton County, Justin, Texas
- Formation: Goodland Formation
- Age: 110 Million Years old
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- Species: Macraster Texanus, Roemer
- Size Diameter: 3.0 inches, (7.62 centimeters)
- Weight: 0.508 pounds (230 grams)
- Collecting Site: Timberbrook construction site, Oliver Creek
- Locality: Denton County, Justin, Texas
- Formation: Washita Group, Fort Worth Formation
- Age: 100 Million Years old
- Top of fossil echinoid covered with Serpula worm tubes, small oysters.
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- Species: Holaster Simplex
- Multiple sizes: 1.25 inches x 1.50 inches (3.175 - 3.81 centimeters)
- Block Weight: 6.2 pounds (2812.0 grams)
- Collecting Site: Timberline construction site
- Locality: Denton County, Justin, Texas
- Formation: Fort Worth Formation
- Age: 100 Million Years old
- Large group of echinoid fossils that were found in a turbidite zone from the Fort Worth formation.
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- Species: Macraster Texanus, Roemer
- Size Length: 4.5 inches, ( 11.43 centimeters ) , Width: 3.75 inches, ( 9.525 centimeters )
- Weight: 2.6 pounds (1179 grams)
- Collecting Site: Timberbrook Construction site
- Locality: Denton County, Justin, Texas
- Formation: Washita Group, Fort Worth Formation
- Age: 95 - 99 Million Years old
- Note: Top of fossil echinoid has oyster shells, serpula worm tubes attached randomly. Fossil still attached to matrix. See all images.
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- Species: Macraster Texanus, Roemer
- Size Length: 2.125 inches, ( 5.40 centimeters ) Height: 0.75 inches, ( 1.91 centimeters ), Width: 2.0 inches, ( 5.08 centimeters )
- Weight: 0.152 pounds (69 grams)
- Collecting Site: Timberbrook Construction site
- Locality: Denton County, Justin, Texas
- Formation: Washita Group, Fort Worth Formation
- Age: 95 - 99 Million Years old
- Note: Top of fossil echinoid has oyster shells, serpula worm tubes attached randomly.
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- Species: Holaster Simplex
- Fossil size: 2.0 inches long x 1.75 inches wide (5.08 centimeters long x 4.45 centimeters wide )
- Fossil Weight: 0.190 pounds (86 grams)
- Collecting Site: Timberbrook construction site
- Locality: Denton County, Justin, Texas
- Formation: Fort Worth Formation
- Age: 100 Million Years old
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- Species: Macraster Texanus, Roemer
- Size Diameter: 3.25 inches, (8.255 centimeters)
- Weight: 0.784 pounds (356 grams)
- Collecting Site: Timberbrook construction site, Oliver Creek
- Locality: Denton County, Justin, Texas
- Formation: Washita Group, Fort Worth Formation
- Age: 100 Million Years old
- Well preserved specimen. Found in interbedded shale zone between limestone beds.
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- Species: Holaster Simplex
- Size Length: 2.5 inches, (6.35 centimeters), Height: 1.87 inches, (4.75 centimeters), Width: 1.87 inches, (4.75 centimeters)
- Weight: 0.310 pounds (141 grams)
- Collecting Site: Timberbrook construction site
- Locality: Denton County, Justin, Texas
- Formation: Fort Worth Formation
- Age: 100 Million Years old
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