Fish in Rock like a Geode

[Rank Amateur]

Sorry, another fossil from my dead acquaintance's estate. This is an interesting fish in a geode-like rock. Open it up and you can see the top and the bottom of the fish's image. The person who split open the rock did an excellent job. The seam is sharp and tight. To get to the fish inside: It is about 10½ millimeters centimeters long and 4¾ mm wide/tall at its widest point. I did just a little bit of magic in this picture to heighten the image. I made it a little bit darker and heightened contrast just a little. The rock from the outside looks like a sweet potato. In fact, the inside of the rock has a reddish, sweet-potato coloring though where the ghost image of the fish is, it is grayish brown. I don't know where this fish was found. A nice fish, well-preserved by my eye.  

[Miocene_Mason]

This is a fossil fish in a concretion. I’m not an expert in these but maybe from the Triassic of Madagascar. It is well preserved, it’s called “lagerstätte”. Amazing things these are.

maybe @oilshale would know more.

[abyssunder]

It's not a geode, but a nice nodule with a fossil fish encased. Maybe it's from Argentina.

[Miocene_Mason]

1 minute ago, abyssunder said:

It's not a geode, but a nice nodule with a fossil fish encased. Maybe it's from Argentina.

I’ve never heard of fossil fish from Argentina, do you mean the Santana formation of Brazil?

[abyssunder]

Yes, that's what I'm trying to correct.

[fossilized6s]

Definitely a nice fish nodule from Madagascar or China, leaning more towards China given the preservation. Nice find!

[abyssunder]

Then it might be a Perleidus sp. ?

 

Edited December 8, 2017 by abyssunder

[Fossildude19]

Definitely from Madagascar - and possibly Perliedus madagascarensis, ... but another possibility is Boreosomus gillioti.

Maybe @oilshale will have a more solid ID. 

Nice fossil.   

Regards,

[piranha]

Perleidus from the lower Triassic of Madagascar has recently been assigned to the new genus: Teffichthys

 

 

Marramà, G., Lombardo, C., Tintori, A., & Carnevale, G. (2017)

Redescription of ‘Perleidus’ (Osteichthyes, Actinopterygii) from the early Triassic of northwestern Madagascar.

Rivista Italiana di Paleontologia e Stratigrafia (Research in Paleontology and Stratigraphy), 123(2):219-242   PDF LINK

[oilshale]

Piranha is right, it's a Teffichthys madagascariensis from the Early Triassic of Madagascar.

The other fish in abyssunder's post is from the Early Triassic, Lower Qinglong Formation which is exposed at Qingshan Quarry, Jurong, Jiangsu Province of China. This fish is often sold under the name 'Lepidotes jurongensis'. In 2009, the fish was described by Li: A new parasemionotid-like fish from the lower triassic of Jurong, Jiangsu province, South China, Palaeontology 52(2):369 - 384 as Peia jurongensis.

Thomas

PS: Nice fish btw!

[FossilDAWG]

Very nice fish!

Just for clarification, is it really only 10 1/2 millimeters (less that 1/2 an inch) long?  That seems very tiny for this species.

 

Don

[abyssunder]

I assumed that the dimensions were given wrong, they should have been ten times bigger to fit, but if the support for the nodule is Granite than the measurments might be good and there is a professional photo.  Hope we'll find out soon.

 

Meantime, here is the document mentioned by Thomas, if someone needed it: Q. Li. 2009. A new parasemionotid-like fish from the Lower Triassic of Jurong, Jiangsu province, South China, Palaeontology 52(2):369-384

[Rank Amateur]

My mistake: the measurements. I said millimeters when I should have said centimeters. I was brought up on feet and inches. I was rooting years ago when we were considering changing to metrics.

[FossilDAWG]

Thanks, that makes more sense.

 

Don