Devonian - Diversity of Life on Earth The Devonian Period...

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Unformatted text preview: Diversity of Life on Earth The Devonian Period The Silurian Period - Summary Terrestrial plants (Division? Characters?) First terrestrial animals? The Devonian Period 409 - 359 Ma The Paleozoic an: included the origin and earl}.f diversificatian oi animals. land plants, and fungi. I. 1?- a" d‘ a "‘- 1- ”“ if}? e3 a? e 3% 49"“ sf 4" a! ‘5’ ‘3' 853 1‘!" k a a" A? grmemgm N 3P J 1. ~1- «i' «a ‘4‘ ea afifa’m‘ifii «if a“ a“??? afififi a‘i a!“ if fiaf 3m '1 a '1_ 4 5' 33 " 3"” mg“ “m idly-mm; 1: {uni FII'III-ipl-ndpllnl Elm-uh diversify. Coal-fmhgsmps “"5” II [in “"5! fl. I'.1 m!- mnmuniiutmr- jtnII-lmingnlmpl dinian pub-14' inm..flm ufihhfl Turf-mi glean fmserui- {mill-Iris InhrttfinFmihad Elma-l. gull“! 3:. nth-n flEfiIhIF- WE‘L-rldillbun .4' I gem] ofulplihllnli: nil—plum.“- r! I. - - .L' - f Lu 4: W} I N 1‘ Salem“: uiGu-ndwlnl Clll'l'll‘ll mid: Supermninent Inf Laura rill-I Supt-rennin“! Pangaea hrmsflaelns cmrmh oi utensil-n in h to II! nurfll and Gm“! Hurlilflfiulding of Hard! Malaria. (firm-It: not Gandhi-m. to In Milli-nah mid. hpaluhiln lid-unkind ell-fl. Illlhm (limit wan-n; little variation. Major phylogenetic milestones of the Devonian 1* “Age of Fishes” 1' New divisions of Plantae emerge Fishes I Class Chonclricthyes (sharks and rays) I Cartilaginous skeletons I scales I two-chambered heart I relativer large brain I Class Osteichthyes (ray-finned and lobe-finned fishes I Otoliths I Lung or swim bladder I Highly-derived visual system (color) I Similar cranial bones What challenges do fish have to overcome on their way to terrestrial life? What challenges do fish have to overcome on their way to terrestrial life? - Respiration (organs) 1' Structural support 1' Movement Support and movement Eustenoptemn, a Devonian lobe-finned fish Earlyr 3 hi hia n "I From sea to land Late Devdnian IDbE-filinad fish aréd amphibioius tatrapodé. : i - '- Ichthfostega land iktaflaiik rivers. swamps arid shallows Acanéhostaga W Coelacanth sea millions of yajars ago r 3§5 3§0 3:75 335 350 Pandan: thys What are the advantages to land colonization? What are the advantages to land colonization? 1' Predator avoidance I 02 availability Plants diversify Bry0phytes IMosses, liverworts, hornworts I'Nonvascular ILife cycle predominantly the gametophyte masses of gemmae from leaf tips I» a _ ' ‘tbl'-_I . . II. r._ . _- I -. .-. Ill. I‘ ..-.,_ , / I" - .. __ ‘ I'll .__‘_: -"".-. .a Division PteridoPhyta ion SphenoPhyta (or, Equ IVIS D hta Iseto I Division Lyc0podta Bundle David Webb ' Devonian: Review |.|dentify the class. 2.What’s the major phylogenetic advance? Devonian: Review |.|dentify the division. ,_ ., __ film“ 2.What’s the major ‘ I phylogenetic advance? w; an «#35: m -' . 3m ‘1' ...
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This note was uploaded on 05/23/2011 for the course BIOLOGY 1520 taught by Professor Davidgarton during the Fall '09 term at Georgia Tech.

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Devonian - Diversity of Life on Earth The Devonian Period...

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