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Showing results for tags 'heteromorph'.
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Visiting fossil collectors from the Odessa school district found the specimen in the first picture and I was reminded of one I found 7 years earlier at the same site shown in the next images. When they asked for the name I had to admit I didn't know. These came from Moss Creek, a nearby tributary of the North Sulphur River and exposing the same deposits, the Ozan Formation from the Taylor Group of the upper Cretaceous. My example is 65 mm long, with a whorl 30 mm X 15 mm. The fragment has a slightly curved shaft, compressed whorl section with a rib index of 4 per whorl height. It h
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Australiceras/Proaustraliceras Ammonite?
Mochaccino posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hello, I came across this listing for a Australiceras/Proaustraliceras ammonite from the Cretaceous Volga River of Russia, about 12 inches long. In terms of restoration, it is just said to be "cleaned, prepped and stabilized". To my amateur eye, there are no suspicious spots or abrupt changes in texture that would indicate reconstruction/restoration or compositing, and I think the matrix also looks typical of the region. What do you think? Any tampering going on or is it all-natural? Thanks. EDIT: I actually noticed- 2 replies
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Hello, I have another tricky ID request with no provenance, for this section of a heteromorphic ammonite. Technically I did get an ID and provenance from the seller as a Nostoceras malagasyense from Madagascar, but the preservation looks very different (more grey/white than brown). This was a chinese seller on that auction site who had that generic ID for a variety of pieces so I suspect it isn't accurate, and he couldn't provide more info when I asked. In the past I did ask about this specimen on this forum using seller-provided photos; I was told it looks instead like
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Muramotoceras ammonite resto?
Mochaccino posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hello, I came across this Muramotoceras ezoenze (yezoense?) ammonite from Yubari, Japan, and was wondering if it seems legit and natural without restoration/reconstruction/tampering? The whole piece is about 6cm at its widest. I can't accurately assess the quality of preservation/prep, but to me the appearance seems consistent with other specimens, except that this one seems incompletely prepped. For the same reason I don't think there is going to be much tampering with parts still embedded in rock but I am no expert. The seller isn't completely sure, but thinks there is no tamper -
Hello, I wanted to get some opinions on this heteromorphic ammonite. It is said to be a Colchidites breistrofferi (61 mm) from the Uppermost Barremian of Paja Fm. in Santander, Colombia. Seller claims no reconstruction/restoration, but it looks quite rough to me. Does it seem legitimate? Is this typically how rough these are, or is this one just badly preserved/prepped? And does the ammonite look complete including living chamber? Thanks!
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Impromptu Construction Site Hunt. Grayson Marl and Pawpaw Formation
EPIKLULSXDDDDD posted a topic in Fossil ID
Following a refreshing swim at the lake with a few friends over the weekend, I decided to take a spur-of-the-moment stop at a construction site I happened to be driving by. The sun was setting, cooling the area and finally making it hospitable despite the recent heat wave. I was not familiar with the exact geology of where I was, but with only an hour and a half of daylight left I decided to not waste too much time and immediately began scouring the dirt. I quickly noticed that the ground was composed of two distinct formations. The higher layer was a grey limestone while the layer- 7 replies
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Ammonite Idiohamites varians Georgetown Formation
JamieLynn posted a gallery image in Members Gallery
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From the album: Texas Cretaceous Fossils: Ammonites and Nautiloids
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From the album: Westphalian cretaceous fossils
unique and lovely are heteromorph ammonites like Scaphites. This small but great one comes from middle cenomanian of southern germany, housed in the collection of a friend of mine-
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From the album: Westphalian cretaceous fossils
a very nice and rare Scaphites cf. diana from upper middle santonian of Gelsenkirchen-Buer. One of the most perfect diana I have ever seen, around 4 cm-
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fine uncoiled Ammonite Aegocrioceras bicarinatum from the tonstein-pit Resse near Hannover. Lower cretaceous, hauterivian. Small ammonit, 5 cm diameter. Phragmocon is pyritized, living chamber partial calcited. Aegocrioceras is a very various ammonit, from tightly curled up to strange and very twisted shapes. I will post some next time© fossils worldwide
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Didymoceras cheyennense?
Mochaccino posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hello, Does this association of Didymoceras cheyennense and Baculites compressus seem legitimate? Any restoration/reconstruction going on, or composite of multiple individuals, especially on the Didymoceras? Dimensions are 22cm x 14cm x 14cm, and listed as of Lower Cretaceous age and from the Pierre Shale of South Dakota. Also, if you had to pick one heteromorph ammonite specimen, would you personally purchase this for your collection (i.e. is it a good example of Didymoceras cheyennense)? I realize this is just a part of the inner whorls. Complete Didymoceras in gene -
Hello, Anyone know what species this is (and if it's legit)? The seller simply calls it a heteromorph from Germany, late Cretaceous ~ 60mya and measures about 10.8 cm long.
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Buying heteromorph ammonites, any red flags?
Mochaccino posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hello, I'm considering purchasing between 3 heteromorph ammonites. I wanted to ask if they are authentic, and whether it seems like there is any restoration or carving going on. Also, if there's any one that looks to be in particularly bad condition. Here is #1. Presumably Nostoceras: #2, also Nostoceras, appears upside-down in matrix with turricone still embedded. Perhaps I can prep that myself? And #3, listed as Acrioceras tabarelli: -
Restored/Composite Heteromorph?
Mochaccino posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hello, new member here. I just purchased this heteromorph ammonite from what's considered a reputable website but I've started to get concerned on the authenticity of this specimen due to the heterogeneous coloration (some places dark, some places light). Is there a chance there's some fake pieces as a composite or perhaps heavy restoration? Also it was listed as eubostrychoceras indopacificum, but it looks different from photos of other such specimens. It seems more like a Nostoceras malagasyense, but perhaps I'm just mistaken? -
From the album: C&D Canal Micro Fossils
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Some more find from Carniol my attempt at id based on http://le-coin-a-fossiles.fr/Gargasien.html first Baculites sp. some of my favourite finds Is further id possible?
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Hi All, Over a year ago I found this in situ NSR - Ozan formation Late Cretaceous; Gulfian Series. It's the only one I've found like this in both size and fossilization. I'm terrible with ammonite identifications and would love to put a name to this little specimen and an opinion on if this might be a heteromorphic ammonite? Might it be a Scaphites sp? Thanks! Suture lines:
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From the album: C&D Canal Micro Fossils
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These heteromorph ammonites were found in the middle East in a senonian outcrop. In a limestone but the fossils are made of flint and removed by acid. the pieces are 3-4 centimetres long and are three different individuals. Can you please help me ID them?
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A large-scale study covering all aspects of paleobiology and anatomy of heteromorphs over the entire period of their existence, from the Late Devonian to the Cretaceous-Paleogene boundary. The article summarizes modern data on heteromorphs and adds some new interesting facts. 2021, not paywalled. Link here
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Hi guys bought this when I was in Morocco however seller had no idea of provenance still bought it as it was very cheap. But would anyone have any ideas as to its age, species , location etc thanks so much
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Russian Heteromorph Ammonite
Charlotte787 posted a topic in Is It Real? How to Recognize Fossil Fabrications
I was considering buying this heteromorph ammonite from an online dealer and was just wondering if it looks authentic. Any advice would be much appreciated! -
McNamara, K., 1987-1988. Australian Ammonites. Australian Natural History. 22(7), Summer 1987-88, pp. 332-336. Index and PDF links to Australian Natural History (1962-1995) Yours, Paul H.
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Metaptychoceras sp. - Upper Cretaceous Eagle Ford Formation - Central Texas
JohnJ posted a gallery image in Members Gallery
From the album: Ammonites
Multiple views of a near complete uncommon heteromorphic ammonite from Central Texas© JohnJ
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From the album: Fauna and Flora of the Austin Group in Texas
This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed.
