Paleontologists suggest that " Tiktaalik " was an intermediate form between fish such as " Panderichthys ", which lived about 385 million years ago and early tetrapods such as " Acanthostega " and " Ichthyostega " that lived about 20 million years later.
42.
The femur of " Antlerpeton " is much more robust than that of " Ichthyostega ", and has prominent ridges like the fourth trochanter that are attachment points for well-developed leg muscles . " Antlerpeton " also has small scales covering its underside.
43.
The pustular ornamentation seen in " S . mirus " is in fact rare among early tetrapods ( plagiosaurid temnospondyls and the very early tetrapod " Ichthyostega " are some of the few to have them ), while the reticulate ornamentation of " S . pereger " is more typical.
44.
The "'uncinate processes of the ribs "'are extensions of bone that project caudally from the vertical segment of each rib . ( Uncinate means " hooked " from Latin " uncinatus ", from " uncinus ", barb, from " uncus ", hook . ) They are found in birds ( except for screamers ), reptiles, and the early amphibian Ichthyostega.
45.
Early groups like " Acanthostega " had eight digits, while the more derived " Ichthyostega " had seven digits, the yet-more derived " Tulerpeton " had six toes . or reptiliomorphs, retained the five-toe pattern still found in Amniotes, while further reduction had taken place on other Labyrinthodont lines, leaving the forefoot with four toes and the hind foot with five, a pattern still found in modern amphibians.
How to say ichthyostega in Hindi and what is the meaning of ichthyostega in Hindi? ichthyostega Hindi meaning, translation, pronunciation, synonyms and example sentences are provided by Hindlish.com.
