EARLY PALEOZOIC LIFE etazoan Invertebrates Mollusca Cephalopods Chambered Nautilus
Feb 22, 2016
EARLY PALEOZOIC LIFEMetazoan InvertebratesMollusca
Cephalopods
ChamberedNautilus
EARLY PALEOZOIC LIFEMetazoan InvertebratesMollusca
Cephalopods
ChamberedNautilusInternal
ChambersSimple Suture Pattern
EARLY PALEOZOIC LIFEMetazoan InvertebratesMollusca
Cephalopods
Ammonoid Cephalopod
Complex Suture Pattern
EARLY PALEOZOIC LIFEMetazoan InvertebratesMollusca The Cephalopod Eye
EARLY PALEOZOIC LIFEMetazoan InvertebratesMolluscaGastropodsShell and viscera twisted 180 above foot ("Torsion") Shell grows in asymmetrical spiral ("Lateral Coiling") Radula changes form and function in different lineages
•scraping plants•grazing on plants •scavenging animals •hunting animals
Early Cambrian to Recent
EARLY PALEOZOIC LIFEMetazoan InvertebratesMollusca Gastropods
EARLY PALEOZOIC LIFEMetazoan InvertebratesMollusca Gastropods
EARLY PALEOZOIC LIFEMetazoan InvertebratesMolluscaChitons•Ancestor is flattened, elongated •Mantle and shell dominate head, foot •Mantle produces shell in 8 plates •Radula scrapes encrusting vegetation
Late Cambrian to Recent
EARLY PALEOZOIC LIFEMetazoan InvertebratesArthropodaVery large phylumChitinous, external skeletonSegmented bodyPaired and jointed appendagesHighly developed nervous system sensory organs
EARLY PALEOZOIC LIFEMetazoan InvertebratesArthropoda
EARLY PALEOZOIC LIFEMetazoan InvertebratesArthropoda Trilobites
Swimming or crawling arthropodsThree longitudinal segments 2 pleural lobes, axial lobe cephalon, (head), thorax, and pygidium (tail)Flexible skeleton
chitin and CaCO3
Complex eyeEarly Cambrian to late Devonian
extinct at Permian
EARLY PALEOZOIC LIFEMetazoan InvertebratesArthropoda Trilobites
Eye structure
EARLY PALEOZOIC LIFEMetazoan InvertebratesArthropoda Ostracodes
Look like beansSegmented body enclosed in CaCO3 and chitin carapaceMarine and freshwaterUseful in biostratigraphyEarly Cambrian to Recent
EARLY PALEOZOIC LIFEMetazoan InvertebratesArthropoda EurypteridsSwimming or crawling arthropodsSome up to 3 m in length
Ordovician to PermianMostly Silurian and Devonian
EARLY PALEOZOIC LIFEMetazoan InvertebratesEchinodermataSpiny-skinned animalsStarfish, sea urchins sea lilies5 part, radial symmetryEndoskeleton CaCO3 platesWater vascular system tube feet
EARLY PALEOZOIC LIFEMetazoan InvertebratesEchinodermata
EARLY PALEOZOIC LIFEMetazoan InvertebratesEchinodermata
Sessile, benthonic forms common in PaleozoicVagrant, benthonic forms common in Mesozoic and Cenozoic
EARLY PALEOZOIC LIFEMetazoan InvertebratesEchinodermata AsteroideaStarfishOrdovician to Recent
EARLY PALEOZOIC LIFEMetazoan InvertebratesEchinodermata OphiuroideaBrittle StarsOrdovician to Recent
EARLY PALEOZOIC LIFEMetazoan InvertebratesEchinodermata EchinoideaSea UrchinsEarly Cambrian to Recent
EARLY PALEOZOIC LIFEMetazoan InvertebratesEchinodermata Crinoidea
CrinoidsMiddle Cambrian to Recent
EARLY PALEOZOIC LIFEMetazoan InvertebratesEchinodermata Blastoidea
BlastoidsEarly Cambrian to Permian
EARLY PALEOZOIC LIFEMetazoan InvertebratesGraptolithina (Graptolites)
MarinePlanktonic or epiplanktonicSessile benthonicChitin skeletonCambrian to Mississippian?
Good index fossil for Ord-Sil
EARLY PALEOZOIC LIFEMetazoan InvertebratesGraptolithina (Graptolites)
EARLY PALEOZOIC LIFEVertebratesFish
EARLY PALEOZOIC LIFEVertebratesFishAgnatha (Agnathids)Jawless fish
Cambrian to Recent
EARLY PALEOZOIC LIFEVertebratesFishAgnatha (Agnathids)Jawless fish
Astrapis
EARLY PALEOZOIC LIFEVertebratesFishAcanthodii (Acanthodians)Early jawed fishLate Silurian to Permian
EARLY PALEOZOIC LIFEVertebratesFishPlacodermi (Placoderms)Plate-skinned
fishesLate Silurian to
Permian
Bothryolepis
EARLY PALEOZOIC LIFEVertebratesFishPlacodermi (Placoderms)
Dunkleosteus
EARLY PALEOZOIC LIFEVertebratesConodontsChordateResemble teethProterozoic to TriassicCalcium phosphate
EARLY PALEOZOIC LIFEVertebratesConodonts
EARLY PALEOZOIC LIFEVertebratesConodonts