Posts Tagged ‘lichida’

An Uncommon Lichid

November 8, 2010

Upon returning to Lexington, one of the first outcrops that I looked forward to collecting was a relatively small outcrop of the Millersburg member of the Lexington Limestone. I worked the outcrop for 8 years back in the 80s, and it produced some stunning fossils.

The Millersburg is a nodular unit of shales and limestones that was deposited on a shallow carbonate bank. The depositional environment was one of relatively high energy as evidenced by the broken and abraded fossils found within the member. For that reason, it is often overlooked by paleo geeks

But, I have found some spectacularly preserved inverts from the member. I pulled a well preserved example of coprophagious(poop eating) symbiosis among the gastropod Cyclonema varicosum and a crinoid from the member 25 years ago, but even better, I found an undescribed lichid trilobite from the same locality!

And, that is what bring me to this post.

That wonderful outcrop, with all of its rare fossils, is no more.

Yep, they paved paradise and put up a parking lot…

So, I moved on to an outcrop farther down the road. I found my first complete trilobite there! It too was gone- The outcrop, not the fossil( I thought that I had written a blog entry about evil civil engineers, but I guess that I didn’t; maybe in the future?)

I then moved on to the next outcrop that wasn’t destroyed, and it was a good one. Other than most of the Pychnocrinus that I have displayed on the blog, I also found a partial pygidium from a lichid trilobite.

Usually, I would pass on something as insignificant as a partial pygidium, but it was from a lichid. Too remember, I pulled an undescribed lichid up the road a bit.

The undescribed trilobite consists of 11 cephalons, two pygidia(is that the plural?), and one hypostome.

Anyway, here it is. It doesn’t look like much, but it sure got my heart racing.


The box is about 1cm

Advertisements