Greenops or Bellcartwrightia pygidium?

[connorp]

I found this small pygidium while prepping some Penn Dixie material. Not sure whether it’s Greenops or Bellacartwrightia. Any thoughts?

 

 

@Fossil-Hound @DevonianDigger Hope you don’t mind the tags.

[DevonianDigger]

In my opinion, it's Bellacartwrightia. The lappets on the pygidium of the Greenops are broader and not as long. I can't see the other details I would look for in this photo. Nice little piece!

[connorp]

23 minutes ago, DevonianDigger said:

In my opinion, it's Bellacartwrightia. The lappets on the pygidium of the Greenops are broader and not as long. I can't see the other details I would look for in this photo. Nice little piece!

Those were my thoughts as well. Thanks!

[Fossil-Hound]

@connorp @DevonianDigger Yeah looks like it could be but not exactly sure. If you see any small bumps on the axial lobe that’s an indicator that this would be a Bellacartwrightia. Looks like a fun prep.

[connorp]

15 minutes ago, Fossil-Hound said:

@connorp @DevonianDigger Yeah looks like it could be but not exactly sure. If you see any small bumps on the axial lobe that’s an indicator that this would be a Bellacartwrightia. Looks like a fun prep.

I’ll get it under magnification later and check. Thanks!

[DevonianDigger]

@Fossil-Hound, there would only be one spine on the pygidium at the most anterior of the axial rings. In this case, I don't believe that portion is present or at least not uncovered. I maintain that this is Bellacartwrightia sp.

 

Greenops barberi

AMNH 45277 (paratype)

 

Bellacartwrightia sp.

in the collection of Gregory Jennings

 

[Malcolmt]

Looks like a bela to me as well

[Kane]

Agreed on Bella. The lappets tell the tale (tail).

[Fossil-Hound]

@DevonianDigger good point and those pygidial spines are also longer and thinner. Gorgeous specimens thanks for sharing.