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just prepping this Lungfish from famous Achanarras-Quarry. Comes from an old collection, partly prepped. Did not expect that the fins are preserved, but they are... what do you think? Is it Dipterus (what I think, too), or Pentlandia? (green rim does not belong to the fossils, prepmarks what has to be removed next days Lenght is 16 cm, approx. 6,5 inch
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Hi I have another nice one to identify. site is Achanarras Quarry shotland. (devonian era) it is 5 cm long and has what looks like feelers. does anybody have an idea?
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Fossil hunting trip at Achanarras quarry, Caithness, Scotland
James_R_V posted a topic in Fossil Hunting Trips
Last week I went upto Caithness hunting for fossil fish at Achanarras quarry. The rocks there formed at the bottom of a huge lake during the Devonian period 385 mya. Most of the fossils I found were incomplete with mostly the tails missing, but I was lucky enough to find a complete diplacanthus, and fragmented cheiracanthus murchinsoni, which I have managed to superglue back together.- 17 replies
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Wondering if anyone can give me a clue as to what I've found at Achanarras Quarry in Caithness, Scotland? I'm pretty much a novice so any help is greatly appreciated.
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I have finally finished exposing another fossil fish from Achanarras quarry in Caithness, which I found in 2020. It took about 2 months to prepare using an dremel 290 engraver. It is a Pterichthyodes (turtle fish). It is mostly complete, although part of the left fin is missing.
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My first attempt at prepping a fish fossil from Caithness.
James_R_V posted a topic in Fossil Preparation
I have finally finished preparing a Fossil lungfish (Dipterus valenciennesi) I found at Achanarras quarry, Caithness, and I though I would share the result. It took me about month to prep it using a dremel 290 engraver. I am pretty chuffed at how it has turned out. I managed to preserve most of the details of the fossil including fin rays. -
Preferably to the friends from UK: What is the best preparation method for a Pterichthyodes milleri from the Devonian of Achanarras? Carbide tipped graver, air scribe or abrasive blaster? And if you can use an abrasive blaster, which abrasive is best? The fish is still almost completely covered and lies in a devilishly hard and thick slab. I want to prep the fish from the other side. What you see here should be the ventral side. What do you think? @Terry Dactyll, @Kosmoceras, @James_R_V
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The two most common fish in Achanarras are Coccosteus cuspidatus and Dipterus valenciennesi References: A Guide to Achanarras Fossils Volume 16: Fossil Fishes of Great Britain Chapter 6: Mid-Devonian fossil fishes sites of Scotland. Site: ACHANARRAS QUARRY (GCR ID: 351)
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Last week I went back Caithness area of Scotland in the hope of finding some more Devonian fish fossils. I spent 3 fossil hunting at Achanarras and 1 day hunting at Holborn head quarry. The most productive site I went to was Achanarras quarry. I found fossils of 5 different species of fish.
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First trip to Achanarras quarry, Caithness, Scotland
James_R_V posted a topic in Fossil Hunting Trips
Last weekend I went on my first fossil hunting trip at Achanarras quarry. I spent a 3 days searching there in the hope of finding few of the famous fossil fish that can be found there. Achanarras quarry for anyone who doesn't know it is the most famous Devonian fish fossil sites in Scotland. The rocks there formed at the bottom of tropical lake 385 million years ago and have produced fossils of over 15 different species of mid Devonian fish. Anyway, after 3 days of searching I managed to find fossils of 4 species of fish, which is not bad for first trip to a new site. The main species I was after was the primitive lungfish known as Dipterus v and I found quite a few. Most of the Dipterus v. fossils I found were incomplete apart this fossil below. This was the most complete fossil I found.- 25 replies
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The little fish, Palaeospondylus gunni, from the Middle Devonian of Achanarras, Caithness, is perhaps the most widely known of all problematical fossils. Ever since it was first described by Traquair in 1890, it has attracted the attention of a very large number of workers. Nevertheless, its affinities have not yet been convincingly demonstrated. The phylogeny of this bizarre fossil has puzzled scientists since its discovery in 1890, and many taxonomies have been suggested. Traquair and the majority of writers have considered Palaeospondylus to be related to Cyclostomes. However, other workers proposed that Palaeospondylus was a larval lungfish, a larval tetrapod, an unarmored placoderm, an agnathan or a chimera. In 2016, Tatsuya Hirasawa, Yasuhiro Oisi and Shigeru Kuratani proposed that Palaeospondylus was a primitive hagfish. This assignment was recently questionend by Z. Johanson et al.: X-ray tomography provided new data and morphological characters demonstrating that Palaeospondylus is a jawed vertebrate. Line drawing: References: J. A. Moy-Thomas (1940): The Devonian Fish Palaeospondylus gunni Traquair. Philosphical Transactions of the Royal Society B. 1940, Volume 230, issue 573. Tatsuya Hirasawa, Yasuhiro Oisi and Shigeru Kuratani (2016): Palaeospondylus as a primitive hagfish. Zoological Letters 2016, 2:20. Volume 16: Fossil Fishes of Great Britain Chapter 6: Mid-Devonian fossil fishes sites of Scotland. Site: ACHANARRAS QUARRY (GCR ID: 351) Johanson Z, Smith M,Sanchez S, Senden T, Trinajstic K, Pfaff C. 2017 Questioning hagfish affinities of the enigmatic Devonian vertebrate Palaeospondylus. R. Soc. open sci. 4: 170214. http://dx.doi.org/10.1098/rsos.170214. Achanarras Quarry
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