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5 days ago · Fish - Evolution, Paleontology, Adaptation: The earliest vertebrate fossils of certain relationships are jawless fishes (superclass Agnatha, order Heterostraci) from the Upper Ordovician. The next class of fishes to appear were jawed vertebrates of the Acanthodii, which arose in the Late Silurian.
- Palaeospondylus
Palaeospondylus, genus of enigmatic fossil vertebrates that...
- Palaeospondylus
5 days ago · The Actinopterygii, or ray-finned fishes, are the largest class of fishes. In existence for about 400 million years, since the Early Devonian, it consists of some 42 orders containing more than 480 families, at least 80 of which are known only from fossils.
2 days ago · A one-of-a-kind strain of rainbow trout exists in an unlikely Canadian watershed. by Chris Hunt - Thursday, Jun 27th, 2024. Photo: Earl Harper. As we sat around what was left of the cooking fire on a bluff overlooking the stunning Aishihik Lake, happily sated by a robust New York strip that, minutes earlier, sizzled and snapped on the grill ...
4 days ago · But he identified the kraken as a cephalopod and devoted much space on Pliny's and Olaus's descriptions of the giant "polypus", noting that Olaus had represented the kraken-polypus as a crayfish or lobster in his illustrations, and reproducing the images from both Olaus's book and his map.
3 days ago · Ichthyosaurian species varied from 1 to 26 metres (3 to 85 ft) in length. Ichthyosaurians resembled both modern fish and dolphins. Their limbs had been fully transformed into flippers, which sometimes contained a very large number of digits and phalanges. At least some species possessed a dorsal fin.
5 days ago · Another giant extinct hawk was Titanohierax about 7.3 kg (16 lb) that lived in the Antilles and The Bahamas, where it was among the top predators. An unnamed late Quaternary eagle from Hispaniola could be 15–30% larger than the modern golden eagle (Aquila chrysaetos).
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3 days ago · There is just one thing in the sea that looks this odd: a sunfish. This sea otter has been attacking and terrorizing surfers along the Santa Cruz coastline on Thursday, July 13, 2023, in Santa ...
