DavidHowdon's picture

2012 Fossil 1

Observed: 20th August 2012 By: DavidHowdon
Amateur Entomologists' SocietyLondon Natural History SocietySelborne Society
DavidHowdon’s reputation in InvertebratesDavidHowdon’s reputation in InvertebratesDavidHowdon’s reputation in InvertebratesDavidHowdon’s reputation in InvertebratesDavidHowdon’s reputation in Invertebrates
IMG_0001
IMG_0002
Description:

Time for my annual fossil pictures on iSpot.

Identifications
  • Ammonite (Ammonite)
    Confidence: I'm as sure as I can be.
  •  
    Likely ID
    ammonite (Dactylioceras)
    Confidence: I'm as sure as I can be.
Species interactions

No interactions present.

Comments

Peter Skelton's picture

ammonite

Though it's a bit crushed and deformed, we can see (a) that it is evolute (i.e., successive whorls are coiled like a rope on the outer side of the inner ones, so do not cover the flanks of the latter as they do, for example, in Nautilus) and (b) that the ribs bifurcate around the venter (outer side of the whorl). Hence it is most likely to be Dactylioceras - similar to the one illustrated also from the Upper Lias of Whitby in the NHM's venerable collector's friend, 'British Mesozoic fossils'.
Peter

DavidHowdon's picture

Excellent thanks

You should really add the ID above so you get the iSpot credit for it.

The information here on what to look at is useful and lets me agree with some of the suggested IDs for other fossils I have posted on iSpot before.