Jump to content

Search the Community

Showing results for tags 'micraster'.



More search options

  • Search By Tags

    Type tags separated by commas.
    Tags should be keywords or key phrases. e.g. carcharodon, pliocene, cypresshead formation, florida.
  • Search By Author

Content Type


Forums

  • Fossil Discussion
    • General Fossil Discussion
    • Fossil Hunting Trips
    • Fossil ID
    • Is It Real? How to Recognize Fossil Fabrications
    • Partners in Paleontology - Member Contributions to Science
    • Questions & Answers
    • Fossil of the Month
    • Member Collections
    • A Trip to the Museum
    • Paleo Re-creations
    • Collecting Gear
    • Fossil Preparation
    • Member Fossil Trades Bulletin Board
    • Member-to-Member Fossil Sales
    • Fossil News
  • Gallery
  • Fossil Sites
    • Africa
    • Asia
    • Australia - New Zealand
    • Canada
    • Europe
    • Middle East
    • South America
    • United States
  • Fossil Media
    • Members Websites
    • Fossils On The Web
    • Fossil Photography
    • Fossil Literature
    • Documents

Blogs

  • Anson's Blog
  • Mudding Around
  • Nicholas' Blog
  • dinosaur50's Blog
  • Traviscounty's Blog
  • Seldom's Blog
  • tracer's tidbits
  • Sacredsin's Blog
  • fossilfacetheprospector's Blog
  • jax world
  • echinoman's Blog
  • Ammonoidea
  • Traviscounty's Blog
  • brsr0131's Blog
  • brsr0131's Blog
  • Adventures with a Paddle
  • Caveat emptor
  • -------
  • Fig Rocks' Blog
  • placoderms
  • mosasaurs
  • ozzyrules244's Blog
  • Sir Knightia's Blog
  • Terry Dactyll's Blog
  • shakinchevy2008's Blog
  • MaHa's Blog
  • Stratio's Blog
  • ROOKMANDON's Blog
  • Phoenixflood's Blog
  • Brett Breakin' Rocks' Blog
  • Seattleguy's Blog
  • jkfoam's Blog
  • Erwan's Blog
  • Erwan's Blog
  • Lindsey's Blog
  • marksfossils' Blog
  • ibanda89's Blog
  • Liberty's Blog
  • Liberty's Blog
  • Back of Beyond
  • St. Johns River Shark Teeth/Florida
  • Ameenah's Blog
  • gordon's Blog
  • West4me's Blog
  • West4me's Blog
  • Pennsylvania Perspectives
  • michigantim's Blog
  • michigantim's Blog
  • lauraharp's Blog
  • lauraharp's Blog
  • micropterus101's Blog
  • micropterus101's Blog
  • GPeach129's Blog
  • nicciann's Blog
  • Olenellus' Blog
  • nicciann's Blog
  • maybe a nest fossil?
  • Deep-Thinker's Blog
  • Deep-Thinker's Blog
  • bear-dog's Blog
  • javidal's Blog
  • Digging America
  • John Sun's Blog
  • John Sun's Blog
  • Ravsiden's Blog
  • Jurassic park
  • The Hunt for Fossils
  • The Fury's Grand Blog
  • julie's ??
  • Hunt'n 'odonts!
  • falcondob's Blog
  • Monkeyfuss' Blog
  • cyndy's Blog
  • pattyf's Blog
  • pattyf's Blog
  • chrisf's Blog
  • chrisf's Blog
  • nola's Blog
  • mercyrcfans88's Blog
  • Emily's PRI Adventure
  • trilobite guy's Blog
  • xenacanthus' Blog
  • barnes' Blog
  • myfossiltrips.blogspot.com
  • HeritageFossils' Blog
  • Fossilefinder's Blog
  • Fossilefinder's Blog
  • Emily's MotE Adventure
  • farfarawy's Blog
  • Microfossil Mania!
  • A Novice Geologist
  • Southern Comfort
  • Eli's Blog
  • andreas' Blog
  • Recent Collecting Trips
  • retired blog
  • Stocksdale's Blog
  • andreas' Blog test
  • fossilman7's Blog
  • Piranha Blog
  • xonenine's blog
  • xonenine's Blog
  • Fossil collecting and SAFETY
  • Detrius
  • pangeaman's Blog
  • pangeaman's Blog
  • pangeaman's Blog
  • Jocky's Blog
  • Jocky's Blog
  • Kehbe's Kwips
  • RomanK's Blog
  • Prehistoric Planet Trilogy
  • mikeymig's Blog
  • Western NY Explorer's Blog
  • Regg Cato's Blog
  • VisionXray23's Blog
  • Carcharodontosaurus' Blog
  • What is the largest dragonfly fossil? What are the top contenders?
  • Hihimanu Hale
  • Test Blog
  • jsnrice's blog
  • Lise MacFadden's Poetry Blog
  • BluffCountryFossils Adventure Blog
  • meadow's Blog
  • Makeing The Unlikley Happen
  • KansasFossilHunter's Blog
  • DarrenElliot's Blog
  • jesus' Blog
  • A Mesozoic Mosaic
  • Dinosaur comic
  • Zookeeperfossils
  • Cameronballislife31's Blog
  • My Blog
  • TomKoss' Blog
  • A guide to calcanea and astragali
  • Group Blog Test
  • Paleo Rantings of a Blockhead
  • Dead Dino is Art
  • The Amber Blog
  • TyrannosaurusRex's Facts
  • PaleoWilliam's Blog
  • The Paleo-Tourist
  • The Community Post
  • Lyndon D Agate Johnson's Blog
  • BRobinson7's Blog
  • Eastern NC Trip Reports
  • Toofuntahh's Blog
  • Pterodactyl's Blog
  • A Beginner's Foray into Fossiling
  • Micropaleontology blog
  • Pondering on Dinosaurs
  • Fossil Preparation Blog
  • On Dinosaurs and Media
  • cheney416's fossil story
  • jpc
  • Red-Headed Red-Neck Rock-Hound w/ My Trusty HellHound Cerberus
  • Red Headed
  • Paleo-Profiles
  • Walt's Blog
  • Between A Rock And A Hard Place
  • Rudist digging at "Point 25", St. Bartholomä, Styria, Austria (Campanian, Gosau-group)
  • Prognathodon saturator 101

Calendars

  • Calendar

Categories

  • Annelids
  • Arthropods
    • Crustaceans
    • Insects
    • Trilobites
    • Other Arthropods
  • Brachiopods
  • Cnidarians (Corals, Jellyfish, Conulariids )
    • Corals
    • Jellyfish, Conulariids, etc.
  • Echinoderms
    • Crinoids & Blastoids
    • Echinoids
    • Other Echinoderms
    • Starfish and Brittlestars
  • Forams
  • Graptolites
  • Molluscs
    • Bivalves
    • Cephalopods (Ammonites, Belemnites, Nautiloids)
    • Gastropods
    • Other Molluscs
  • Sponges
  • Bryozoans
  • Other Invertebrates
  • Ichnofossils
  • Plants
  • Chordata
    • Amphibians & Reptiles
    • Birds
    • Dinosaurs
    • Fishes
    • Mammals
    • Sharks & Rays
    • Other Chordates
  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

Found 38 results

  1. I found this Phlycticrioceras trinodosum heteromorph specimen in June of 2018 whilst hunting the middle/upper Coniacian Atco formation. It is the largest fragment of this species that I am aware of, having a whorl height of 51 mm as opposed to 47 mm of the largest fragment I've seen published. This genus is a bigger, rarer, and (mostly) younger cousin of Allocrioceras. I sent pictures of it to Keith Minor and he pointed out that there was also an echinoid sticking out of the specimen, something which I had totally missed! With much of the echinoid still stuck in the living chamber it is hard to get a definitive ID. But because it has such a shallow anterior ambulacra, which gives the anterior end a more smooth rather than definitive heart shape, he ruled out both Mecaster texanus and batensis. He suggested Micraster since the site has a strong European component in both the bivalve and ammonite faunas, and because the periproct side has the right shape. From finding other, although not as well preserved specimens that show similar morphology he appears to be right. I have yet to confirm this ID with Andrew Smith, but either way I think the piece is worth showing. And reading this thread got me thinking about how this could have happened and what effect it could have had on the echinoid's preservation. My thought is that because irregular echinoids lived and today still live most of their lives burrowing in the sediment it is unlikely that it would have crawled into the living chamber, but instead that it was blown into it post-mortem via currents that had dredged it out of the sediment. I already know that this site was a high energy environment from my other finds here so this seems the most likely possibility to me. But because of the fact there is still at least one spine still attached to the specimen it could not have been swept up from the sediment too long after death or all of its hairlike spines would have blown away. I do, however, find it interesting that it is positioned anterior first with its posterior towards the aperture, the position I would expect to see it in if it had indeed crawled into the shell. The specimen is also the best preserved echinoid from this site so far. Despite the ammonites being generally well preserved and not too crushed, most of the echinoids that I have from the site are terribly crushed, flakey, and often infested with rotting pyrite. I think being encapsulated in the chamber very much reduced those effects. Even though the ammonite and the echinoid are a bit crushed, the echinoid would have probably been worse off otherwise. The heteromorph fragment length is 70 mm and the whorl breadth, being a bit crushed, is 13 mm. I would think that this specimen, with its open planispiral coiling, would would have been at least over a foot in diameter when complete. It is the robust (female) morph of the species with a rib index of 5½. For comparison in Fig. 1 I pictured it with my most complete P. trinodosum specimen. From the part of the echinoid that is exposed I can measure 25 mm in length, 25 in width, and a thickness of 8 mm. I have also found abundant yet scattered fish remains at the site, so perhaps one day an ammonite-fish will come my way. But until then, anyone else got ammonite-echinoids to show? Fig. 1. Fig. 2.
  2. I hadn't seen an echinoid with beekite before so I had to buy it. Micraster glyphus?, Campanian, Höver, Germany.
  3. Echinoids : best from the april 2018 hunt

    From the album Haute normandie - April 2018

    Last hunt from Normandy cretaceous : best of echinoids
  4. At the start of the Christmas holiday I went with my girlfriend on a fossil hunting weekend to the French coast. first stop was the “pointe au oies” with jurassic deposits. apart from a small echinoid we didn't find a lot of decent fossils. after lunch we went 80km more to the south to a little hotel above the cretaceous cliffs near Ault. Since it was still light when we got there we made a 1st prospection on the beach and quickly found a few nice echinoids ( Micraster sp. ) the next day further inspection of the boulders on the beach delivered even more beautiful echinoid specimens. most of them very well preserved. This was a successful trip, I’ll certainly go back there next year.
  5. Double micraster decipiens 1 1 august 2015

    From the album Senneville-sur-Fécamp

    double micraster decipiens 1 view 2 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  6. Double micraster decipiens 1 1 august 2015

    From the album Senneville-sur-Fécamp

    double micraster decipiens 1 view 1 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  7. Micraster decipiens 2 august 2015

    From the album Senneville-sur-Fécamp

    Micraster decipiens 2 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  8. Micraster decipiens 1 august 2015

    From the album Senneville-sur-Fécamp

    Micraster decipiens 1 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  9. Highlights of august 2015 hunt

    From the album Senneville-sur-Fécamp

    Highlights of august 2015 hunt
  10. Double micraster decipiens 2 3 august 2015

    From the album Senneville-sur-Fécamp

    double micraster decipiens 2 view 3 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  11. Double micraster decipiens 2 2 august 2015

    From the album Senneville-sur-Fécamp

    double micraster decipiens 2 view 2 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  12. Double micraster decipiens 2 1 august 2015

    From the album Senneville-sur-Fécamp

    double micraster decipiens 2 view 1 - august 2015 :heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  13. Groupe view of spet 2015 hunt.

    From the album Senneville-sur-Fécamp

    Best of my september hunt from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  14. Micraster Sp (leskei?)

    From the album Senneville-sur-Fécamp

    Micraster sp (leskei?) : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  15. Double micraster decipiens - view 3

    From the album Senneville-sur-Fécamp

    Double micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  16. Double micraster decipiens - view 2

    From the album Senneville-sur-Fécamp

    Double micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  17. Double micraster decipiens - view 1

    From the album Senneville-sur-Fécamp

    Double micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  18. Micraster decipiens - 7

    From the album Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  19. Micraster decipiens - 6

    From the album Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  20. Micraster decipiens - 5

    From the album Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  21. micraster decipiens - 1

    From the album Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  22. urchins group picture - oursins groupe

    From the album Senneville-sur-Fécamp

    Micraster decipiens and 1 echinocorys gravesi (center) from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  23. micraster decipiens - close up

    From the album Senneville-sur-Fécamp

    Micraster decipiens : close up of heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  24. micraster decipiens - 4

    From the album Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
  25. micraster decipiens - 3

    From the album Senneville-sur-Fécamp

    Micraster decipiens : heart urchin from the turonian chalk of normandy - Senneville sur Fécamp -Turonian - Cretaceous
×