Difference between Zlichovaspis and Odontochile

[Savvas]

Greetings. I would like if possible a visual guide to understand the difference between Odontochile and Zlichovaspis, which most often get mistaken with each other. I have red the differences, but without a visual aid I am struggling to understand them. 

[Collector9658]

Here's some photos of the two that can show some differences. 

 

Zlichovaspis has a subtriangular cephalon with a short median processus, a subtriangular pygidium, and a longer medial terminal spine. Zlichovaspis has ornamentation, while the later is smooth.

 

*credit* Photos from online fossil website.

 

Zlichovaspis rugosa

Odontochile cf. hausmanni

Edited April 25, 2023 by Collector9658

[Savvas]

33 minutes ago, Collector9658 said:

Here's some photos of the two that can show some differences. 

 

Zlichovaspis has a subtriangular cephalon with a short median processus, a subtriangular pygidium, and a longer medial terminal spine. Zlichovaspis has ornamentation, while the later is smooth.

 

*credit* Photos from online fossil website.

 

Zlichovaspis rugosa

Odontochile cf. hausmanni

Thank you. Ornamentation on what part?

[Savvas]

52 minutes ago, Collector9658 said:

Here's some photos of the two that can show some differences. 

 

Zlichovaspis has a subtriangular cephalon with a short median processus, a subtriangular pygidium, and a longer medial terminal spine. Zlichovaspis has ornamentation, while the later is smooth.

 

*credit* Photos from online fossil website.

 

Zlichovaspis rugosa

Odontochile cf. hausmanni

With this visual aid you provided I believe that this trilobite from my collection is an Odontochile, am I right? 

 

Edited April 25, 2023 by Savvas

[Collector9658]

46 minutes ago, Savvas said:

Thank you. Ornamentation on what part?

Throughout the whole shell, there are small bumps/ spikes vs Odontochile can have fine coarse granules. They are easily obliterated away by preparation.

 

I can't see the download you added.

Edited April 25, 2023 by Collector9658

[Savvas]

4 minutes ago, Collector9658 said:

Throughout the whole shell, there are small bumps/ spikes. They are easily obliterated away by preparation.

 

I can't see the download you added.

Excuse me I added a wrong pdf file by accident. I mean the photo 

Edited April 25, 2023 by Savvas

[Collector9658]

55 minutes ago, Savvas said:

Excuse me I added a wrong pdf file by accident. I mean the photo 

I think so. Not sure which species though. I would try observing the shell under magnification to see if it's smooth, or if there are remnants of ornamentation to be certain though.

Edited April 25, 2023 by Collector9658

[Savvas]

3 minutes ago, Collector9658 said:

I think so. Not sure which species though. I would try observing the shell under magnification to see if it's completely smooth, or if there are remnants of ornamentation to be certain though.

Sorry but I am a bit  confused. You say that you think it is an Odontochile but then state that not sure what species, you mean that are there more species of Odontochile?

[Collector9658]

32 minutes ago, Savvas said:

Sorry but I am a bit  confused. You say that you think it is an Odontochile but then state that not sure what species, you mean that are there more species of Odontochile?

Odontochile is a genus not a species.

Edited April 25, 2023 by Collector9658

[Savvas]

3 minutes ago, Collector9658 said:

Odontochile is a genus not a species.

Aaah that's very interesting. Thank you. Do you have any name of Odontochile species I could look up for? Is Zlichovaspis part of the Odontochile genus?

Edited April 25, 2023 by Savvas

[Collector9658]

24 minutes ago, Savvas said:

Aaah that's very interesting. Thank you. Do you have any name of Odontochile species I could look up for? Is Zlichovaspis part of the Odontochile genus?

They are in the same family, but different genera. I don't have a species list, sorry. Someone else might?

Edited April 25, 2023 by Collector9658