weird looking (Lino)productus

[blackmoth]

the incomplete ventral valve is rather large, about 5cm wide and 8  cm longe,  convext,  sulcus deep and thin for productus type.

It has a kind of  triangle shape, with  the beak  broken and bent down. The beak itself actually look like a normal shaped productus, with

costae and concentric lines at right angles forming a grid like network.

The concentric lines are missing in other part of the shell, though the tubercles seem to be scatterd every where.

I have never seem any thibk like this. Could it just be a drastically deformed productus of some kind, or some individual that got some abnormal

growth in its life?

 

[Coco]

Hi,

 

What do you mean by "Productus"? I don’t know what it is. Naming a fossil without its genus is useless. Do you know how many genera have as species "productus" ? We never mention a fossil by its latin species name alone

 

Coco

[Wrangellian]

Isn't 'Productus' a brachiopod genus name? (Like Linoproductus)

[t-tree]

Linoproductus is the genus of the brachiopod .

 

John

[westcoast]

I don't see anything particularly unusual about this brachiopod...

[Coco]

4 hours ago, Wrangellian said:

Isn't 'Productus' a brachiopod genus name? (Like Linoproductus)

In this case, it must be written "Productus".

 

Coco

4 hours ago, blackmoth said:

...sulcus deep and thin for productus type.

 

 

Coco

[FossilNerd]

2 hours ago, westcoast said:

I don't see anything particularly unusual about this brachiopod...

I’m not seeing anything too wild about this either, but... I think more in focus pictures outside of the plastic container may help.
 

It’s hard to see the details you mentioned with reflections and scratches on the plastic obscuring the view. 

[blackmoth]

2 hours ago, westcoast said:

I don't see anything particularly unusual about this brachiopod...

What genus could it belong to? The common Productus type I see from the site (Taiyuan Formation, Shanxi Province) usually have a more or less spherical shape with shallow sulcus. like this one.

[blackmoth]

4 hours ago, Coco said:

Hi,

 

What do you mean by "Productus"? I don’t know what it is. Naming a fossil without its genus is useless. Do you know how many genera have as species "productus" ? We never mention a fossil by its latin species name alone

 

Coco

Sorry I am not well trained on fossil jargons. The brachiopods in the site mostly fall into one of the two broad "types" (Productus or Spririfer) , I guess they are two orders (or suborder)

so the right term may be  Productinida .

[blackmoth]

15 minutes ago, FossilNerd said:

I’m not seeing anything too wild about this either, but... I think more in focus pictures outside of the plastic container may help.
 

It’s hard to see the details you mentioned with reflections and scratches on the plastic obscuring the view. 

I could not get a better pic as a large depth of focus is needed for a 3D object. Here is sketch.

 

[Tidgy's Dad]

Squished Linoproductus, methinks. 

[erose]

The ornament looks too coarse for Linoproductus in my opinion. Here in Texas there are many genera of similar "Productid" type brachiopods often all in the same formation. I suggest doing some research and seeing if you can find a list of known species from that area.

[Wrangellian]

12 hours ago, Coco said:

In this case, it must be written "Productus".

 

I understood "(Lino)productus" to be shorthand for "Productus or Linoproductus", and since this is not a scientific paper, it's OK in my mind.