trilobite
Three-lobed fossil creature
A trilobite is an extinct marine arthropod that dominated ocean floors for nearly 300 million years before dying out in the Permian extinction.
Named for their three-lobed body structure, trilobites are among the most common fossils, prized by collectors for their distinctive segmented forms: She found a perfect trilobite fossil in the shale.
External skeletal structure
- thoraxCentral body cavity
- segmentationDivision into sections
- glabellaForehead's lowest midpoint
- pleuraMembrane around lungs
jointed · appendages · carapace · chitin · molting · enrolled
Earliest Paleozoic period
- OrdovicianPaleozoic geological period
- SilurianPaleozoic period, mid-range
- DevonianGeologic period, 419-359 million years ago
- CarboniferousCoal-depositing geological period
Permian · prehistoric · primordial · geological · era · Paleozoic · Gondwana · Pangea
Mark from applied pressure
- castPerformers, throw, or splint
- moldForm-giving container
- preservationMaintaining something's condition
- petrificationBecoming rock-like
sediment · excavation · mineralization · compression · carbonization · trace · burial · amber
Study of prehistoric ecosystems
- faunaAnimal life collectively
- invertebrateAnimal sans backbone
- paleogeographyStudy of ancient Earth surfaces
- stratigraphyStudy of rock layers
sedimentology · assemblage · biome · predation · coevolution · radiation · diversification
Methodical arrangement or request
- genusTaxonomic rank above species
- speciesFinest taxonomic rank
- classificationSystematic grouping by traits
- morphologyStudy of structural forms
exoskeleton
External skeletal structure
- thoraxCentral body cavity
- segmentationDivision into sections
- glabellaForehead's lowest midpoint
pleura · jointed · appendages · carapace · chitin · molting · enrolled
Cambrian
Earliest Paleozoic period
- OrdovicianPaleozoic geological period
- SilurianPaleozoic period, mid-range
- DevonianGeologic period, 419-359 million years ago
Carboniferous · Permian · prehistoric · primordial · geological · era · Paleozoic · Gondwana · Pangea · ancient
imprint
Mark from applied pressure
- castPerformers, throw, or splint
- moldForm-giving container
- preservationMaintaining something's condition
petrification · sediment · excavation · mineralization · compression · carbonization · trace · burial · amber · dig
paleoecology
Study of prehistoric ecosystems
- faunaAnimal life collectively
- invertebrateAnimal sans backbone
- paleogeographyStudy of ancient Earth surfaces
stratigraphy · sedimentology · assemblage · biome · predation · coevolution · radiation · diversification
order
Methodical arrangement or request
- genusTaxonomic rank above species
- speciesFinest taxonomic rank
- classificationSystematic grouping by traits
- fossil arthropodssea scorpions, insect fossils, amber fossil
- arthropodsarthropod, arthropods, Arthropoda, insects, insect
- invertebratesinvertebrate, arthropod, arthropods, mollusk, crustacean
- natural historynatural history, natural history museum, naturalist, naturalists, natural philosophers
- Extinct Animalsdinosaur, dinosaurs, tyrannosaurus, dodo, mammoth
- fossilsdinosaur bones, ammonite, amber, ammonites, fossils
trilobitehorseshoe crab
Spike-tailed marine arthropod
cockroach · living fossil · nautilus · coelacanth · shark