mikeymig Posted October 11, 2011 Share Posted October 11, 2011 (edited) A very well preserved hypostome (trilobite mouthpart) found on 9/25. These are rarely found complete! Its not from Dipleura or Eldredgeops and the other trilobite species I find at this site are Bellacartwrightia, Monodechenella, and an undiscribed species of Greenops. If you know who it belongs to then please let me know. Age - Middle Devonian, Formation - Windom, Locality - Livingston County,NY., Size - .5". Okay I will try to load the pic again! Edited October 11, 2011 by mikeymig Many times I've wondered how much there is to know. led zeppelin Link to comment Share on other sites More sharing options...
Fossildude19 Posted October 11, 2011 Share Posted October 11, 2011 Pictures would be helpful. We have a number of Trilobite enthusiasts here on the Forum. They should be able to help if they get eyes on the specimen. Regards, Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
TOM BUCKLEY Posted October 11, 2011 Share Posted October 11, 2011 A very well preserved hypostome (trilobite mouthpart) found on 9/25. These are rarely found complete! Its not from Dipleura or Eldredgeops and the other trilobite species I find at this site are Bellacartwrightia, Monodechenella, and an undiscribed species of Greenops. If you know who it belongs to then please let me know. Age - Middle Devonian, Formation - Windom, Locality - Livingston County,NY., Size - .5". Okay I will try to load the pic again! I've got some hypostomes from the same locality and after posting on the forum I learned that it was Greenops / Bellacartwrightia. Based on the opinions of some very learned trilobitists I learned what some genus' hypostome look like. I can say with 99% certainty that is not Phacops, Greenops, or Bellacartwrightia. That's my story and I'm sticking to it. Tom AVOCATIONAL PALEONTOLOGIST STROKE SURVIVOR CANCER SURVIVOR CURMUDGEON "THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS" Link to comment Share on other sites More sharing options...
TOM BUCKLEY Posted October 11, 2011 Share Posted October 11, 2011 (edited) A very well preserved hypostome (trilobite mouthpart) found on 9/25. These are rarely found complete! Its not from Dipleura or Eldredgeops and the other trilobite species I find at this site are Bellacartwrightia, Monodechenella, and an undiscribed species of Greenops. If you know who it belongs to then please let me know. Age - Middle Devonian, Formation - Windom, Locality - Livingston County,NY., Size - .5". Okay I will try to load the pic again! With the two wings on the top and the two lobes at the bottom it sort of looks like Dipleura? Tom Edited October 11, 2011 by TOM BUCKLEY AVOCATIONAL PALEONTOLOGIST STROKE SURVIVOR CANCER SURVIVOR CURMUDGEON "THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS" Link to comment Share on other sites More sharing options...
mikeymig Posted October 11, 2011 Author Share Posted October 11, 2011 Thanks Tom, Here is what I was told a Dipleura hypostome looks like. The size kind of told me that it was Dipleura because its a little over an inch wide and .8" long. Same location and both were found recently. Ive been digging here forever and never thought much about hypostomes until now of course. Many times I've wondered how much there is to know. led zeppelin Link to comment Share on other sites More sharing options...
Fossildude19 Posted October 12, 2011 Share Posted October 12, 2011 Nicely done on the pictures! Thanks for posting these - I'm always looking to learn more! Those are pretty cool. Regards, Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
TOM BUCKLEY Posted October 12, 2011 Share Posted October 12, 2011 Thanks Tom, Here is what I was told a Dipleura hypostome looks like. The size kind of told me that it was Dipleura because its a little over an inch wide and .8" long. Same location and both were found recently. Ive been digging here forever and never thought much about hypostomes until now of course. You are more than welcome ..... but I wouldn't take my ID to the bank until we get some expert opinions. Tom AVOCATIONAL PALEONTOLOGIST STROKE SURVIVOR CANCER SURVIVOR CURMUDGEON "THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS" Link to comment Share on other sites More sharing options...
cowsharks Posted October 12, 2011 Share Posted October 12, 2011 Neat topic. Never heard the term "Hypostome" before, but then again, I'm a shark tooth collector not a bug collector. I always like learning new stuff though, at least will take the occasional effort to "google" something I've never heard of before. You may already have this website, but this one that I found has some neat drawings of many kinds of trilobite Hypostomes: My Hypostome link Maybe it will help. If nothing else, now I have picture of what this trilobite "mouth part" is. Daryl. Link to comment Share on other sites More sharing options...
Kosmoceras Posted October 12, 2011 Share Posted October 12, 2011 Amazing! Great find! Very well done! Link to comment Share on other sites More sharing options...
piranha Posted October 12, 2011 Share Posted October 12, 2011 The morphology for a Dipleura hypostome is spot-on correct. As you astutely point out, no other trilobite was large enough to have been the owner of that big mouth. Link to comment Share on other sites More sharing options...
TOM BUCKLEY Posted October 12, 2011 Share Posted October 12, 2011 Here's a Greenops / Bellacartwrightia hypostome. Tom AVOCATIONAL PALEONTOLOGIST STROKE SURVIVOR CANCER SURVIVOR CURMUDGEON "THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS" Link to comment Share on other sites More sharing options...
erose Posted October 12, 2011 Share Posted October 12, 2011 The morphology for a Dipleura hypostome is spot-on correct. As you astutely point out, no other trilobite was large enough to have been the owner of that big mouth. One of my most prized fossils is a hypostome. The genus is Isotelus and probably I. maximus Locke. It was found in the Whitewater Formation, Cincinnatian Series (Upper Ordovician) Dayton, Ohio. It is 6 centimeters (~2.5") long. By my calculations the original trilobite would have been well over 12 inches long if not 16! I am attaching a second image of a better preserved specimen from the Kope Formation, Cincinnatian Series (Upper Ordovician) which is lower down in the Cinci and could either be I. maximus or I. gigas. That one is just 18 millimeters long. I will be going back through some of my NY Devonian fossils now looking for hypostomes amongst all the "arthropod unknowns" I have stashed away. We seldom get good info on them. Thanks everyone. Link to comment Share on other sites More sharing options...
piranha Posted October 12, 2011 Share Posted October 12, 2011 Attached is the hypostome of a different homalonotid trilobite. Scabrella sp. is essentially a Moroccan Dipleura on steroids. The chart (linked above) with figured diagrams of the various hypostoma of trilobites is generally a good indicator within a group (family), taking into consideration minor variations from one genus/species to another. Link to comment Share on other sites More sharing options...
fengw03 Posted October 13, 2011 Share Posted October 13, 2011 Great pictures! Good to learn all these. Link to comment Share on other sites More sharing options...
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