Monday, November 26, 2012

Fishapod

Devonian fishapod
wikimedia
The schematic drawing has devonian sarcopterygia lobe-fins and tetrapods four legged animals. Fishapod half fish and half four legged animals.

The list below includes six devonian lobe-fins and tetrapods as well as one from Carboniferous and one from Permian periods.

First animal in the list is the still living Coelacanth and last animal pictured is a seal as an example of a developed mammal who can swim and also move on land using its fins and breathing with lungs.


Lobe-fins

Coelacanth - hollow skeleton "Living fossil"
Latimeria chalumnae malli
Oxford Museum of Natural History
wikimedia


1. Eusthenopteron - steady fins "Prince of Miguasha"
Eusthenopteron model
Late Devonian Miguasha Quebeck Canada
wikimedia

2. Panderichtys - Pander's fish Named after Christian Heinrich Pander
Panderichtys rekonstruction
Devonian period Latvia
wikimedia 

3. Tiktaalik - Canadian inuit word for burbot "Missing link"
Tiktaalik roseae rekonstruction
Devonian period Nunavut territory, Canada
wikimedia


Tetrapod

4. Ichtyostega - fish leg First discovered tetrapod. Lived in water
Ichyostega rekonstruction
Greenland, Danemark
wikimedia

5. Acanthostega - spiky roof  (strange name...) Relative of Ichyostega Lived in water
Acanthostega modek Stuttgart Museum of Natural History
Greenland, Danemark
wikimedia

6. Tulerpeton - "Crawling from Tula" Relative of Ichyostega. Also on land
Tulerpeton rekonstruction
Andreyevka, Tula, Russia
wikimedia

7. Hynerpeton - "Crawling from Hyner" 8 fingers
Hynerpeton rekonstruction
Hyner, Pennsylvania USA
wikimedia

8. Crassigyrinus - "big tadpole" Carboniferous

Crassigyrinus scoticus rekonstruction
Skotlanti
wikimedia

9. Diadectes - "cross bite" First large 1.5-3 m long land animal. Permian
Diadectes rekonstruction
wikimedia

Diadectos another reconstruction
wikimedia





Pinniped - fin footed!
Harbour seal foca vitulina
wikimedia
Among the mammals we know from our own world there are animals that move in water with fin like limbs. The details are different but the idea is the same as in Late Devonian lobe-fins and tetrapods. Those fins are clumsy on land ... but work somehow!




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