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Yorkshire Ammonite ID


Microraptorfan

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Microraptorfan

Hi I visited the Yorkshire coast and found several different ammonites, doe anyone here have an ID for them?

 

20210121_105203.jpg

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Microraptorfan

I thought this might be some species of Dactyiloceras?

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Possibly, but it depends on location. There are some Callovian ammonites from south of the main Lias exposures that are very similar.

 

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Hello,its a alligaticeras alligatum callovien stage,best regards

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14 minutes ago, herve said:

Hello,its a alligaticeras alligatum callovien stage,best regards

That's a good bet. Do we need a venter shot and horizon to be sure?

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Microraptorfan

It was from either Port Mulgrave or Runswick Bay I forget which though

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Microraptorfan

These are some other ammonites I found

20210121_124130.jpg Dactylioceras? found at Runswick/Kettleness

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Microraptorfan

20210121_124227.jpg I think its a hildoceras but unsure on species, was found at Port Mulgrave

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Microraptorfan

Found at Port Mulgrave, unsure on species

20210121_124325.jpg

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Microraptorfan

This one is from Runswick Bay

20210121_125407.jpg

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Microraptorfan

Closer up shot of the ribbing

20210121_125412.jpg

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BentonlWalters

Nice finds! Personally I disagree with the first one being Alligaticeras, in pictures I've seen of them the living chamber is much larger compared with the rest of the ammonite that in this example. Furthermore, both Mulgrave and Runswick are Toarcian and Pliensbachian rather than Callovian, almost certainly from the Whitby Mudstone Formation. Alligaticeras is known further south than this around Scarborough. I think it is closer to Dactylioceras ?commune which are common at these sites. The second specimen is more confidently D. commune, the third is Hildoceras possibly bifrons, The fourth with the spines is Peronoceras but I'm unsure of the species and the last I think is Cleviceras (also called Eleganticercas).

 

For Yorkshire ammonites the blog Andysfossils (https://andysfossils.com/) is a fantastic resource for identification with clear pictures. 

Hopefully this helps

Benton

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31 minutes ago, BentonlWalters said:

Nice finds! Personally I disagree with the first one being Alligaticeras, in pictures I've seen of them the living chamber is much larger compared with the rest of the ammonite that in this example. Furthermore, both Mulgrave and Runswick are Toarcian and Pliensbachian rather than Callovian, almost certainly from the Whitby Mudstone Formation. Alligaticeras is known further south than this around Scarborough. I think it is closer to Dactylioceras ?commune which are common at these sites. The second specimen is more confidently D. commune, the third is Hildoceras possibly bifrons, The fourth with the spines is Peronoceras but I'm unsure of the species and the last I think is Cleviceras (also called Eleganticercas).

 

For Yorkshire ammonites the blog Andysfossils (https://andysfossils.com/) is a fantastic resource for identification with clear pictures. 

Hopefully this helps

Benton

Yes, Port Mulgrave or Runswick Bay rules out Callovian. Locality is so important!

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