My trilobite of the week.

[piranha]

8 hours ago, rew said:

Y is for Yinites sp. of Early Cambrian age from the Hongjingshao Formation at Malong, Yunnan, China.

 

 

Yinites yunnanensis is the described species from Yunnan Province.

 

 

figures from:

 

Zhang, W. 1966
On the Classification of Redlichiacea, with Descriptions of New Families and New Genera.
Acta Palaeontologica Sinica, 14(2):135-184

 

Secher, A. 2024
The Trilobite Collector's Guide.

Columbia University Press, 453 pp.

[rew]

That looks like what I have.

[rew]

Trilobite #359 is a main trilobite.

 

Y is for Yunnanocephalus yunnanensis for Early Cambrian age from the Heilinpu Formation near Kumming, Yunnan, China.

 

They really wanted to make sure you know that this trilobite came from Yunnan.

 

This specimen has be prepared on a pedestal and has preserved antennae. 

 

Edited March 29 by rew

[C2fossils]

Nice!

 

[rew]

Thanks.  I think that's a pretty nice representative of the species myself.

[rew]

Next week is brought to you by the letter Z.  There will be one bonus trilobite.  It will be shown on Wednesday, because I will be away Monday and Tuesday.

 

[Brian James Maguire]

Some beautiful specimens there

[rew]

Trilobite of the week #360 is a bonus trilobite.

 

Z is for Zlichovaspis rugosa of Early Devonian age (Pragian stage) from the Lhandar Formation at Atchana, Morocco.

 

This is a fairly common Dalmanitid trilobite.

 

 

Edited April 3 by rew

[rew]

Trilobite of the week #361 is a main trilobite.

 

Z is for Zacanthoides serratus of Middle Cambrian age from the Langston Formation at Box Elder County, Utah.

 

[rew]

The alphabet is finished.  But there will be a few more trilobites, back to one a week.

[rew]

The complete list of main trilobites, after all name correction by our local experts.

 

A  Acidaspis cincinnatiensis

B  Boedaspis ensifer

C  Cybella coronata

D  Dicranopeltis nereus

E  Erbenochile erbeni

F  Fallotaspis cf. bondoni

G  Gabriceraurus mifflinensis

H  Heliopeltis johnsoni

I  Iberocoryphe sp.

J  Jenkinsonia varga

K  Koneprusia sp.

L  Lonchodomas volberthi

M  Metapolichas platyrhinus

N  Nevadia weeksi

O  Odontocephalus aegeria

P  Pandaspinapyga tumida

Q  Quadrops flexuosa

R  Radiaspis sp.

S  Scabrellana sp.

T  Tricrepicephalus texanus

U  Upplandiops calvus

V  Viaphacops claviger*

W  Walliserops trifercatus

X   Xiphogonium trautensteinensis

Y  Yunnanocephalus yunnanensis

Z  Zacanthoides serratus

 

* The AMNH trilobite gallery calls this bug Viaphacops claviger, as does Andy Secher is his book The Trilobite Collector's Guide, so I'm sticking with that name out of sheer stubbornness. 

 

Edited April 5 by rew

[ClearLake]

On 4/5/2024 at 10:39 AM, rew said:

The alphabet is finished.  But there will be a few more trilobites, back to one a week.

I am going to be sad when this thread comes to an end.  It certainly is an amazing collection!  You must keep getting new ones so we can see them - haha!!  Do you have these displayed?  I think early on you said that was another project, just curious if it has come to fruition or is still in the works.

[rew]

Right now I'm in the middle of building my first display case.  But it's for a couple of crinoid plates.

[rew]

Trilobite of the week #362 is Barrandia homfrayi of Early Ordovician age from the Lower Llanvirn Series, Hope Shales at Hyssington, Shelve Inlier, Shropshire, UK.

 

This is in the family Nileidae so it's closest relative in my collection is Symphysurus ebbestadi which was trilobite of the week #166.

 

 

[Brandy Cole]

Congratulations on making your way through the alphabet and starting anew!  What a tremendous amount of time and effort.  Thank you for sharing!

[rew]

5 hours ago, Brandy Cole said:

Congratulations on making your way through the alphabet and starting anew!  What a tremendous amount of time and effort.  Thank you for sharing!

 

You're welcome.

[rew]

I screwed up.

 

Trilobite #357 (Xylabion) was supposed to be trilobite #367.

Trilobite #358 (Yinites) was supposed to be trilobite #368.

Trilobite #359 (Yunnanocephalus yunnanensis) was supposed to be trilobite #369

Trilobite #360 ( Zlichovaspis rugosa) was supposed to be trilobite #370.

Trilobite #361 (Zacanthoides serratus) was supposed to be trilobite #371.

Trilobite #362 (Barrandia homfrayi) was supposed to be trilobite #372.

 

So the next bug is trilobite #373.

 

My incipient senility is showing.

[rew]

 Trilobite of the week #373 is Basilicus sp. of Early Ordovician age (Late Tremadocian stage) from the Fezouata Formation at the Zagora Area, Morocco.

 

This is in many ways a typical member of the Asaphidae, with a broad, smooth carapace.  But is has one notable feature -- it is humungous, a bit over 45 cm long.  This is certain to be the largest trilobite I ever own and may well be the largest trilobite I ever see in real life.

 

There is about 10% restoration on this trilobite, more than I like to see.  On the other hand, you are unlikely to see a complete dinosaur in a museum that is as much as 90% real.

 

 

[rew]

Trilobite of the week #374 is Micragnostus chiushuensis of Late Cambrian age, from the Sandu Formation at Jingxi, Guangxi, China.

 

This is a tiny trilobite, about 3 mm long.  The Basilicus weighed about 3 million times as much.  As is often the case with agnostids, I'd give about a 50% chance that I have this one shown heads up.

 

Edited 1 hour ago by rew