7-Teleostomi

7-Teleostomi - Click to edit Master subtitle style Advanced...

Info iconThis preview shows pages 1–15. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Click to edit Master subtitle style Advanced Jawed Fishes: Part 1 Teleostomes: Acanthodii & Lecture 7: Chap 11, DOF SlingJAW WRASSE &#2; http://www.youtube.com/watch?v=XgXQyMI4A &#2; http://www.youtube.com/watch?v=JQucKIv6NM0& Carbonif erous Camels often sit down carefully, perhaps their joints creak rec ent Persistent early oiling might prevent perennial rust mnemonic devices PERIODS (PALEOZOIC, MESOZOIC) Cambrian 540 to 505 mya Ordovician 505 to 438 mya Silurian 438 to 408 mya Devonian 408 to 360 mya Carboniferous 360 to 280 mya Permian 280 to 248 mya Triassic 248 to 208 mya Jurassic 208 to 146 mya Cretaceous 146 to 65 mya EPOCHS (CENOZOIC) Paleocene 65-54 mya Eocene 54-38 mya Oligocene 38-24 mya Miocene 24-5 mya Advanced Jawed Fished 1: &#2; Bony fishes first appear in the fossil record in the Late Ordovician &#2; Teleostomes composed of three classes Acanthodians Sarcopterygians Actinopterygians } Euteleostomi (Osteichthyes) Click to edit Master subtitle style BONY FISH: &#2; 98% OF ALL LIVING VERTEBRATES ARE MEMBERS OF TELEOSTOMI (MANY NOT IN THE WATER) AND ALL VERTEBRATES EXCEPT Class Acanthodii† Class Acanthodii† &#2; “Spiny sharks”, but not sharks &#2; Small salt and freshwater fishes (<20cm to 2.5m) &#2; Large eyes &#2; Flexible bodies covered with bony, rhombic scales &#2; Heavy spines in front of the fins. &#2; An opercular series covering the gills &#2; 3 orders, 9 families, 60 genera known Trends in Acanthodii &#2; Early forms had multiple gill covers, broad unembedded spines anterior to all fins except the caudal and between the pectoral and pelvic fins &#2; Advanced forms with a single gill cover, ancillary paired spines are lost, other spines became smaller and embedded in musculature &#2; Some specialized forms were toothless with Why are Acanthodii &#2; Have synapomorphies only seen in other advanced gnathostomes including: Three semicircular canals Otoliths Neural and haemal arches with the unrestricted vertebral column Lateral line canals Ossified operculum Branchiostegals &#2; Each canal is filled with a fluid called...
View Full Document

This note was uploaded on 09/13/2010 for the course BIOL 4145 taught by Professor Chakrabarty during the Fall '09 term at LSU.

Page1 / 43

7-Teleostomi - Click to edit Master subtitle style Advanced...

This preview shows document pages 1 - 15. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online