lab 2 photo ID

what characterizes chordates?

• notochord

• dorsal hollow nerve cord

• pharyngeal slits

• endostyle

• myomeres

• post-anal tail

what is this? what is it an example of? time period?

• branchiostoma

• recent

• cephalochordate

what is this? time period?

• pikaia

• cambrian

• cephalochordate

what are vertebrates characterized by?

developed cranial area and sensory structures:

• cranial skeleton

• paired camera-like eyes

• paired olfactory capsules

• anteriorly expanded nerve cord

• semicircular canals

• neural crest cells

• arcualia

what is the time period of vertebrates?

Cambrian to recent

what is this? time period?

• myllokunmingiida

• taxon: metaspriggina

• cambrian

• vertebrata

what is this? time period?

• vertebrata

• conodonta (denticles)

• cambrian to triassic

what is this? time period?

• cyclostomata (lamprey, hagfish)

• devonian to recent

• taxon: Mayomyzon

what is this? time period?

• anapsida (vertebrate)

• silurian to devonian

• fin-like structures (extensions of dermal shield)

• taxon: birkenia

what is this? time period?

• pteraspidomorphi (vertebrate)

• ordovician to devonian

• taxon: Drepanaspsis

what is this?

• pteraspidormorphi (vertebrate)

• ordovician to devonian

• taxon: Sacabambaspis

what is this? time period?

• thelodonti (vertebrate)

• ordovician to devonian

• taxon: Coelolepis

what is this?

• thelodonti (vertebrate)

• taxon: Loganellia

• ordovician to devonian

what is this?

• vertebrata

• osteostraci

• silurian to devonian

• taxon: Hemicyclaspis

what is this?

• vertebrata

• osteostraci

• silurian to devonian

• taxon: cephalaspis

what groups belong to gnathostomata?

• chondrichthyes

• osteichthyes

• silurian-recent

what is this?

• antiarchi (gnathostomata)

• silurian to devonian

• taxon: bothriolepis

what is this?

• arthrodira (gnathostome)

• devonian

• taxon: Dunkleosteus

what is this?

• acanthodii

• late ordovician-permian

• (fin spines)

• taxon: Acanthodes

what is this?

• class: Chondrichthyes

• Devonian to recent

• Basal chondrichthyan — Cladoselache

what is this?

• class: Chondrichthyes

• Devonian to recent

• taxon: Symmorium

what is this?

• class: Chondrichthyes

• Devonian to recent

• Eugeneodontiform — Edestus

what is this?

• class: Chondrichthyes

• Devonian to recent

• Hybodont — Hybodus

• spine

what is this?

• class: Chondrichthyes

• Devonian to recent

• Ctenacanth — Acrodus

• tooth plates

what is this?

• class: Chondrichthyes

• Devonian to recent

• Neoselachii — Cyclobatis

• fossil ray

what is this?

• class: Chondrichthyes

• Devonian to recent

• Holocephali — Hydrolagus

• prismatic calcified cartilage

what are osteichtyes?

• silurian to recent

• 2 divisions:

  • Actinopterygii

  • sarcopterygii

• homocercal tail

actinopterygii vs sarcopterygii

• actinopterygii

  • ray-finned

  • 1 dorsal fin

  • gnaoid scales

• sarcopterygii

  • lobe-finned

  • 2 dorsal fins

  • cosmic scales

what is this?

• basal actinopterygii (Osteichthyes)

• silurian to recent

• ptycholepis

what is this?

• basal actinopterygii (Osteichthyes)

• silurian to recent

• cheirolepis

what is this?

• actinopterygii (Osteichthyes)

• acipenser

• silurian to recent

• extant basal actinopterygii

what is this?

• actinopterygii (Osteichthyes)

• polyodon

• silurian to recent

• extant basal actinopterygii

what is this?

• dapedium

• actinopterygii (Osteichthyes)

• silurian to recent

• basal neopterygii

what is this?

• canobius

• actinopterygii (Osteichthyes)

• silurian to recent

• basal neopterygii

what is this?

• lepisosteus

• extant basal neopterygii

• actinopterygii (Osteichthyes)

• silurian to recent

what is this?

• actinopterygii (Osteichthyes)

• basal teloest

• neoproscinetes

• homocercal tail, cycloid scales

what is this?

• actinopterygii (Osteichthyes)

• basal teloest

• Pholidophorous

• homocercal tail, cycloid scales

what is this?

• actinopterygii (Osteichthyes)

• basal teloest

• aspirerhynchus

• homocercal tail, cycloid scales

what is this?

• actinopterygii (Osteichthyes)

• basal teloest

• Cladocyclus

• homocercal tail, cycloid scales

what is this?

• euteleost

• acanthomorph

• dapalis

• actinopterygii (Osteichthyes)

what is this?

• euteleost

• acanthomorph

• Cockerellites

• actinopterygii (Osteichthyes)