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Showing results for tags 'dipnoi'.
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From the album: Triassic
Lungfish are an ancient group of fish, with swim bladders that evolution co-opted as a kind of "lung," allowing them to breathe air. This may have proven invaluable in a seasonally dry climate in Pangea.-
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Birthday Fossil Hunting trip to Ardennes (Devonian of Belgium)
ziggycardon posted a topic in Fossil Hunting Trips
Hi everyone! Last weekend I took a couple of days off work for my birthday and I decided to visit a fossil spot in the ardennes which was recently recommended to me because there was a chance to find fossils of primitive plants as well as devonian fish (which is one of my main interests within the hobby). The site is relatively close by as well which was a huge plus as it only took an hour to drive. The fossils in this location date back to the late Devonian, Famennian to be exact (372.2 million years ago to 358.9 million years ago) After searching for a 45 minutes we finally found the top spot with the right layer rich in plant material, here are some in situ pictures of the larger examples (which we didn't extract). If I am correct I believe these are the remains of Rhacophyton condrusorum which is a primitive species of fern if I remember reading once. We were also lucky to find some fossils of devonian fish, which was the main reason for our visit. A lovely small Lungfish (Dipnoi indet) tooth An imprint of a fish scale of bone While it was quite a cold day, it was sunny and we had a quiet afternoon at the spot where we could search in peace. -
Mazon Creek Best Of The Best Esconichthys Apopyris Bardack, 1974
RCFossils posted a topic in Member Collections
The Mazon Creek Deposit is known for many enigmatic creatures. Esconichthys is one of them. The animal has a tadpole shaped body with a usually well preserved pair of eyes. Some specimens preserve 2 pairs of long external gills. Muscle segments called myomeres are sometimes present on laterally preserved specimens. What makes it unusual is that it does not have paired fins. It was originally suggested that Esconichthys may be a larval lungfish or possibly an amphibian. Later studies have stated this is unlikely without offering an alternative placement. Due to the presence of external gills, it is believed that these are likely a larval stage. The largest specimens known can reach almost 8 centimeters. Early collectors referred to these animals as blades or grasshoppers based on their general shape. They are the most common vertebrate found in the Mazon Creek Deposit. Specimens are only known from the marine (Essex) portion. Esconichthys was named to recognize the Earth Science Club Of Illinois (ESCONI).- 7 replies
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