Week 5: Early Teleostei Osteoglossomorpha Elopomorpha Clupeomorpha.

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Presentation transcript:

Week 5: Early Teleostei Osteoglossomorpha Elopomorpha Clupeomorpha

Osteoglossomorpha freshwater (not in Europe) bony tongue left oriented intestine

Class Lamprey Osteoglossomorpha

ps = parasphenoid tongue = glossohyal osteo-gloss = bony tongue

OSTEOGLOSSOMORPHA Hiodontidae (Hiodontiformes) FW NA ~ 2 sp. Pantodontidae (Osteglossiformes) W. Africa ~ 1 sp. Osteoglossidae (Osteoglossiformes) S. Hemisphere ~8 species

SA

North AmericaEurasia Australia AfricaSouth America cladogram for major continents Present day ~400 MYA Osteoglossidae arawana arapaima

Osteoglossidae arawana (arowana, aruana) silver arawana Osteoglossum bicirrhosum SA ~1 m pair of sensory barbels

10 ft (3 m) 400 lbs (180) kg Arapaima gigas Brazil aquarium aka pirarucu Osteoglossidae

ornate

surface feeders aerial leaps ~2 m refraction

~connected to gut lung-like air bladder

Osteoglossum Osteoglossidae arapaima arawana Amazon River Basin Osteoglossum

Scleropages Osteoglossum arawana

120 MYA 105 MYA 65 MYA 50 MYA Today NH 6/09

Arapaima gigas both parents guard embryos (~50,000) in nest secretes nutritious mucus parental care

one parent mouth broods (~100) in mouth

Osteoglossum (S. A., Africa) (male mouth broods) Scleropages (Asian, Australian) (female mouth broods)

O. bicirrhosum