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Rocky Stoner

Trilobite cephalon - Stranger

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Rocky Stoner

Hi folks :)

Had a chance to crack a few chunks of shale today and found a new trilobite cephalon that I haven't seen here before. The extended "ear" was in perfect condition initially but was very fragile. It got fractured a bit so I halted the prep to get a pic while it was relatively intact. The eye looks a lot like the eldredgeops.

My favorite reference, "Views of the Mahantango" lists 4 species but the list does not include this one (best I can tell).

I found a few other familiar specimens and attached pics of them as well.

All from the same spot as the dipleura found earlier.

Thanks for looking.

Regards:)

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Kane

Hm, neat. This looks similar to a Greenops cephalon. Could you take another picture aiming at the lenses of its eye?

 

It is listed on that site, but perhaps with a different tag: http://viewsofthemahantango.blogspot.ca/2010/06/greenops.html

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Rocky Stoner

Hi Kane.

Yes yes, I hadn't looked closely enough at the greenops. Not sure why, but I assumed it was something other due to already finding greenops pygidia.:wacko:

I'll get another pic shortly. And a pic of the eldredgeops prepped out a bit, but a little squashed.

Thanks Kane.

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Rocky Stoner

.... few more pics.

The basic shape of the eye looked similar to me at first. Appeared to be a little damaged and not showing the many individual lenses as in the eldredgeops.

Pretty, none the less.

Thanks again.

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Kane

Any time. :) 

 

And I think the last picture in your first post is a Dipleura dekayi cephalon piece (you probably already knew that and were posting it as an ensemble of specimens collected. My apologies - I must have missed or forgotten one of your previous posts!).

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WhodamanHD

There's the head of the greenops, now all you need is a thorax! It's cool that the other eldregeops head right next to it. Nice finds!

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GerryK

The cephalon is not a Greenops but a Bellacartwrightia

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Kane
Just now, GerryK said:

The cephalon is not a Greenops but a Bellacartwrightia

@Rocky Stoner - This is even more exciting than a Greenops. Incredible find! :) 

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Rocky Stoner
13 minutes ago, GerryK said:

The cephalon is not a Greenops but a Bellacartwrightia

Hi GerryK,

  What features are present that distinguishes one from the other ?

THANKS !

12 minutes ago, Kane said:

@Rocky Stoner - This is even more exciting than a Greenops. Incredible find! :) 

:fistbump:

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ynot

Nice find Rocky!

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GerryK

 1) spine base on the occipital ring; Greenops does not have a spine

2) S2 furrow merges with axial furrow; in Greenops the S2 furrow does not merge with axial furrow

3) Moderate to broad cephalic border;  Greenops has a narrow cephalic border

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Rocky Stoner
12 minutes ago, GerryK said:

 1) spine base on the occipital ring; Greenops does not have a spine

 

2) S2 furrow merges with axial furrow; in Greenops the S2 furrow does not merge with axial furrow

 

3) Moderate to broad cephalic border;  Greenops has a narrow cephalic border

 

Easy to see the differences now. Excellent description, THANKS MUCH !

Always exciting to find something new different. :)

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