13-Elopomorpha - Elopomorpha(Teleostei Lec-13 Chap 14 DOF Click to edit Master subtitle style Elopomorpha(Teleostei Lec-13 Chap 14 DOF Click to edit

13-Elopomorpha - Elopomorpha(Teleostei Lec-13 Chap 14 DOF...

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Click to edit Master subtitle style 9/14/10 Elopomorpha (Teleostei) Lec-13; Chap 14 DOF
Click to edit Master subtitle style 9/14/10 Elopomorpha (Teleostei) Lec-13; Chap 14 DOF
9/14/10 Elopomorpha (Teleostei)
9/14/10 Elopomorpha Mostly marine, fossils dating back to the Jurassic 4 orders, 25 families and about 804 species
9/14/10 Elopomorpha Extremely diverse morphologically, include tarpons, bonefishes, true eels, gulpers and spiny eels.
9/14/10 Elopomorpha All linked together by a leptocephalus larvae
9/14/10 Leptocephalus - larvae Planktonic larvae – they are thin, transparent, and leaflike drifting passively with currents. Leaflike body shape allows absorption of dissolved organic matter
9/14/10 Leptocephalus larva
9/14/10 Leptocephalus - larvae Once thought to comprise its own taxonomic group Can live 2-3 years in some anguillid species Lack of red blood cells make them translucent
9/14/10 Leptocephalie - larvae All Elopomorpha have leptocephalus larvae, although they are distinctive Elopiform larvae have a forked tail and a distinct dorsal fin, eel larvae have a rounded “tail” that merges with an elongate dorsal fin.
9/14/10 Diversity of
9/14/10 Elopomorpha All shallow water tropical or subtropical marine forms that occasionally enter fresh or brackish water
9/14/10 Elopomorpha Have thin, riblike, epipleural intermuscular bones that extend from the vertebral column to the surrounding trunk musculature. These are the small bones in the meat of primitive teleosts that make them difficult to fillet and eat.
9/14/10 Subdivision Elopomorpha Order Elopiformes (tarpons, ladyfishes) Order Albuliformes (bonefishes, spiny eels) Order Anguilliformes (eels) Order Saccopharyngiformes (gulpers)
9/14/10 Elopiformes Primitive features (1) gular bone on the underside of throat, lost in all other advanced teleosts; (1) High number of branchiostegals rays in the throat (10-35 vs 5-7 most advanced forms); (3) Inclusion of the maxilla in the gape, two biting bones in the upper jaw rather than one (4) Heavy ganoin scales (found in gar and bichirs)
9/14/10 Elopiformes Eights species, two families All streamlined, predatory fish with large cycloid scales and deeply forked tails Gular bone present Heavy bony ganoin scales Females can have >12 million eggs Pelagic fishes that superficially resemble herring
9/14/10 Elopiformes Elopidae Megalopidae Lady fishes; tenpounders Tarpon

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