Ozan Oddballs. Regular Urchin Fragment and Fish Jaw Fragment?

[Mikrogeophagus]

Took a trip today to one of my new Ozan spots that is rapidly becoming a favorite, despite the headache it is to reach. Although the finds are few and far between, I've always come out with something I haven't seen before. It's definitely been testing my ID skills. I didn't come out with too many things, but I've got a couple I would like to get some informed opinions on.

 

First up is a regular urchin. I've found a few fragments of regular echinoids washed out within a small stretch of creek. Though this is the third I've seen, its the first of this appearance and first to safely make it undamaged (it's a bumpy ride to get in and out). I'm pretty bad with echinoid IDs, but from comparison with the ones I'm familiar with, I think it's a kind of salenia. It also looks like it could be a goniophorus. I don't know the terminology, but the lines of mini tubercles in between the primary tubercles look closer to salenia. They seem to form paired lines. This guy is about 7.5 mm across. If it is salenia, I'm guessing it isn't the typical texana, mexicana, etc. that are found in older cretaceous fms of TX, so I wonder what species it could be if not a new one !

 

The second specimen I want to share looks like a fish jaw to me. Initially, I was very confused on what it could be. I thought it was tooth shaped, but had enamel unlike any I was familiar with. After some prepping, I think I've found a single tooth socket. Unfortunately, most of the "jaw" had been eroded away. Do you guys think it's a fish jaw? If so, any guesses on genus/species?

 

 

Thanks for reading and feel free to ask for additional pics!

[JohnJ]

Nice echinoid fragment for that formation!  I think it would be best to put off any suggestion of an ID until you find a diagnostic specimen...too many possibilities.  

[Mikrogeophagus]

@JohnJ Yeah I may have been a little overambitious with trying to ID a species... but do you think there is enough here to at least differentiate between salenia, goniophorus, or other? There isn't a ton to work with, but is there any single distinguishing characteristic present that pushes the odds in favor of one over the other?

[JohnJ]

I don't think it is either, but that is because there is too little there to make those assumptions and too many other possibilities.

[Lone Hunter]

I'm pretty sure this is a fish head 

 

[Mahnmut]

I

9 hours ago, Lone Hunter said:

I'm pretty sure this is a fish head 

I can give you a species: Piscis pareidolicus  (Hunter, 2022)

[Jared C]

Is this the same Ozan site of yours that has produced that cool invert material in the past? If so, you've got a legendary little honey hole here. Every time I see your username coupled with "Ozan" in a title I get excited to see what you found.

[Mikrogeophagus]

@Jared C This one is a different spot, but it seems to have all of the same Ozan stuff and then some. Less gravel, but more shale to play around in!