Belemnites

[Notidanodon]

Hi guys, I’ve got these 2 belemnites from the sinemurian of Lyme Regis and I was wondering whether it would be possible to put a name on them, thanks  

1.

2.

[Tidgy's Dad]

There are lots of belemnites in the Belemnite Marls and Black Venn Marls for starters which end up washed out onto the beach.

I think the second one is probably Passaloteuthis, but Tarquin knows a lot more about belemnites than I do. @TqB

[TqB]

I agree with Passaloteuthis for the second. There's no furrow detail clear on the first one but it does seem to be markedly depressed  so it could be a Parapassaloteuthis, quite rare, P. ridgensis being the only descibed one. 

They're both Lower Pliensbachian and look like Stonebarrow Marl Member (Belemnite Marls) though the polish makes it tricky to tell!  There's nothing like that in the Sinemurian which has only small Nannobelus species (and rare "Coeloteuthis" which badly needs revision).

Edited June 12, 2022 by TqB

[Notidanodon]

2 hours ago, Tidgy's Dad said:

There are lots of belemnites in the Belemnite Marls and Black Venn Marls for starters which end up washed out onto the beach.

I think the second one is probably Passaloteuthis, but Tarquin knows a lot more about belemnites than I do. @TqB

Thanks Adam  

1 hour ago, TqB said:

I agree with Passaloteuthis for the second. There's no furrow detail clear on the first one but it does seem to be markedly depressed  so it could be a Parapassaloteuthis, quite rare, P. ridgensis being the only descibed one. 

They're both Lower Pliensbachian and look like Stonebarrow Marl Member (Belemnite Marls) though the polish makes it tricky to tell!  There's nothing like that in the Sinemurian which has only small Nannobelus species (and rare "Coeloteuthis" which badly needs revision).

thanks so much ! That’s very informative oops I got that wrong, would more photos help with the first?  

[TqB]

4 minutes ago, will stevenson said:

would more photos help with the first?  

They might, with lower angle light to show apical furrows and depressions on the flanks. And a photo of the broken end to see if any alveolus is there.

[Notidanodon]

2 minutes ago, TqB said:

They might, with lower angle light to show apical furrows and depressions on the flanks. And a photo of the broken end to see if any alveolus is there.

I’ll do that when I get home  

[Notidanodon]

23 hours ago, TqB said:

They might, with lower angle light to show apical furrows and depressions on the flanks. And a photo of the broken end to see if any alveolus is there.

I tried my best  

[TqB]

17 hours ago, will stevenson said:

I tried my best  

Thanks.  I'd stick with Parapassaloteuthis ridgensis as likely, though ID has to be provisional when you don't know exactly what bed it's from. Belemnite species are best defined when you have a population (like everything really!). There's a fair bit of alveolus so the whole thing is quite stocky.