1) Transitional fossil
Found on
https://www.crosswordclues.com/clue/acanthostega
Acanthostega (meaning spiny roof) is an extinct labyrinthodont genus, among the first vertebrate animals to have recognizable limbs. It appeared in the Upper Devonian (Famennian) about 365 million years ago, and was anatomically intermediate between lobe-finned fishes and the first tetrapods fully capable of coming onto land. It had eight digits o...
Found on
http://en.wikipedia.org/wiki/Acanthostega
(from the article `community ecology`) By the Late Devonian the earliest tetrapods had appeared. Forms such as Ichthyostega and Acanthostega (both from eastern Greenland) are the ...
Found on
http://www.britannica.com/eb/a-z/a/9
Acanthostega (which means 'spine plate') was an early tetrapod that lived during the Devonian period (roughly 360 million years ago). This aquatic animal was about 60 cm (2 ft) long (includign its long tail). Its front limbs (and perhaps the rear limbs also) had 8 digits; it had internal gills and lungs. Protective oval-shaped scutes protected its ...
Found on
http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
No exact match found.
