Acanthostega (meaning "spiny roof") is an extinct genus of stem-tetrapod, among the first vertebrate animals to have recognizable limbs. It appeared in...
12 KB (1,367 words) - 22:35, 14 July 2024
evolved in the Devonian, including the Late Devonian-age Ichthyostega and Acanthostega, as well as the trackmakers of the Middle Devonian-age Zachelmie trackways...
104 KB (10,592 words) - 09:21, 23 August 2024
fin was not as deep as in Acanthostega, and would have been less useful for swimming. Ichthyostega is related to Acanthostega gunnari, which is also from...
16 KB (1,336 words) - 06:49, 24 August 2024
defining changes on the basis of anatomy of Ichthyostega, Tulerpeton, and Acanthostega. In the cranium, there is a stapes derived from the hyomandibular of...
20 KB (2,761 words) - 07:00, 19 January 2022
group, the earliest limbed tetrapodomorphs such as Ichthyostega and Acanthostega, which evolved in the Devonian period long before the origin of the crown...
15 KB (989 words) - 17:31, 17 August 2024
Ventastega is more primitive than other Devonian tetrapodomorphs including Acanthostega and Ichthyostega, and helps further understanding of the fish-tetrapod...
24 KB (2,476 words) - 17:15, 2 June 2024
Russia at a site named Andreyevka. This genus and the closely related Acanthostega and Ichthyostega represent the earliest tetrapods. Tulerpeton is considered...
9 KB (1,088 words) - 19:51, 29 February 2024
the species that existed during this transition, such as Tiktaalik and Acanthostega. Many of these species were also the first to develop adaptations suited...
15 KB (1,973 words) - 14:34, 18 March 2024
lobe-finned fish (like Gooloogongia and Eusthenopteron) and tetrapods (like Acanthostega). The pelvis was much larger than in other fish, nearly the same size...
58 KB (6,023 words) - 04:50, 23 June 2024
polydactyly. Polydactyly in early tetrapod aquatic animals, such as in Acanthostega gunnari (Jarvik 1952), one of an increasing number of genera of stem-tetrapods...
17 KB (1,932 words) - 20:00, 5 August 2024