Crayfish gastroliths

  title={Crayfish gastroliths},
  author={Ethan A. Tucker and Maurice E. Tucker},
  journal={Geology Today},
Crayfish produce small button‐like gastroliths in their stomachs. These curious calcitic objects are increasingly common in lakes and streams in the UK and Europe as the invasive American crayfish increase their domination of freshwater environments. These stomach stones are also present in the geological record. 

Crayfish bio-gastroliths from eastern Australia and the middle Cretaceous distribution of Parastacidae

The new specimens indicate that parastacid crayfish were widespread in eastern Australia by middle Cretaceous time, occupying a variety of freshwater ecosystems from the Australian–Antarctic rift valley in the south, to the near-coastal floodplains surrounding the epeiric Eromanga Sea further to the north.



Dinosaur gastroliths revisited

  • W. L. Stokes
  • Environmental Science, Geography
    Journal of Paleontology
  • 1987
Additional information on the alleged gastroliths in Early Cretaceous formations of the Western Interior has changed the writer's opinion from skepticism about a dinosaur causative agency to belief

Paleozoic-Mesozoic crayfish from Antarctica: Earliest evidence of freshwater decapod crustaceans

Discovery of an Early Permian claw from Antarctica extends the fossil record of crayfish by ∼65 m.y. and demonstrates that decapod crustaceans had radiated into freshwater habitats by the late


Plesiosaurs are an unusual and intriguing group of extinct aquatic reptiles ( Fig. 1 ). They are sauropterygians, a group known from an array of semi‐aquatic forms during the Triassic period:

Paleohydrologic and Stratigraphic Significance of Crayfish Burrows in Continental Deposits: Examples from Several Paleocene Laramide Basins in the Rocky Mountains

ABSTRACT Paleocene crayfish burrows are present locally in great abundance in the Greater Green River, Hanna, Wind River, and Piceance basins of Wyoming and Colorado. In the Washakie sub-basin of the

Calcium Deposits in the Crayfish, Cherax quadricarinatus: Microstructure Versus Elemental Distribution

The crayfish Cherax quadricarinatus stores calcium ions, easily mobilizable after molting, for calcifying parts of the new exoskeleton in a pair of gastroliths synthesized in the stomach wall, and the microstructure at the nanometer level is observed.

Titanosaur teeth and plesiosaur gastroliths

  • Geology Today
  • 2013

Fossils explained 54 : Plesiosaurs

  • Geology Today
  • 2008

Fossils explained 54: Plesiosaurs. Geology Today

  • 2008