Crinoids and crinoid fossil platesGiant Crinoids and Crinoid Fossil Plates
Crinoids and Crinoid Fossil



GIANT Museum Grade Crinoid Fossil #11 {79" x 59" {77 Crinoids amazing preserved pinnules} (SOLD)


Code: Crinoid-11
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GIANT Museum Grade Crinoid Fossil #10 {61" x 59" {Amazing preserved pinnules} (SOLD)


Code: Crinoid-10
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Museum Size and Grade Crinoid Fossil plate #8 with 63 Crinoids (56" x 48") (SOLD!)


Code: Crinoid-8
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Large Crinoids Fossil plate #7 (47" x 38") (SOLD!)


Code: Crinoids-7
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Crinoid Fossil tables With Custom base and Glass Top (SOLD!)


Code: Crinoids-Fossil-Table
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RARE Starfish, Trilobite & Crinoids Fossils Mortality Plate 21" x 18" {Inquire For Price}


Code: Starfish-Trilobite-Mortality-Plate
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Giant Crinoids and crinoid fossil plates

From Wikipedia, the free encyclopedia

Floating Crinoids

Image Courtesy of "Fossil Facts and Finds"

 

 

  “Crinoids are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). Crinoidea comes from the Greek word krinon, "a lily", and eidos, "form".[2][3] They live both in shallow water and in depths as great as 6,000 metres (20,000 ft).[citation needed] Sea lilies refer to the crinoids which, in their adult form, are attached to the sea bottom by a stalk.[4] Feather stars[5] or comatulids[6] refer to the unstalked forms. Crinoids are characterised by a mouth on the top surface that is surrounded by feeding arms. They have a U-shaped gut, and their anus is located next to the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, most crinoids have many more than five arms. Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults. There are only about 600 extant crinoid species,[7] but they were much more abundant and diverse in the past. Some thicklimestone beds dating to the mid- to late-Paleozoic are almost entirely made up of disarticulated crinoid fragments.” Crinoids comprise three basic sections; the stem, the calyx, and the arms. The stem is composed of highly porous ossicles which are connected by ligamentary tissue. The calyx contains the crinoid's digestive and reproductive organs, and themouth is located at the top of the dorsal cup, while the anus is located peripheral to it. The arms display pentamerism or pentaradial symmetry and comprise smaller ossicles than the stem and are equipped with cilia which facilitate feeding by moving the organic media down the arm and into the mouth.

1.      Hansson, Hans (2012). "Crinoidea". World Register of Marine Species. Retrieved 2013-01-30.

2.     Jump up^ Webster's New Universal Unabridged Dictionary. 2nd ed. 1979.

3.     Jump up^ "crinoid". Online Etymology Dictionary.

4.     Jump up^ "Sea lily". Encyclopædia Britannica. Retrieved 14 March 2011.

5.     Jump up^ "Feather star". Encyclopædia Britannica. Retrieved 14 March 2011.

6.     Jump up^ Ausich, William I.; Messing, Charles G. "Crinoidea". Tree of Life. Retrieved 14 March 2011.

7.     Jump up^ "Animal Diversity Web - Crinoidea". University of Michigan Museum of Zoology. Retrieved August 26, 2012.

8.     ^ Jump up to:a b c d e f g h i j k l Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. pp. 997–1007. ISBN 0-03-056747-5.

9.     Jump up^ Baumiller, Tomasz K.; Mooi, Rich; Messing, Charles G. (2008). "Urchins in the meadow: Paleobiological and evolutionary implications of cidaroid predation on crinoids".Paleobiology 34 (1): 22–34. doi:10.1666/07031.1. JSTOR 20445573.

10.  Jump up^ Hess, Hans (2003). "Upper Jurassic Solnhofen Plattenkalk of Bavaria, German". In Brett, Carlton E.; Ausich, William I.; Simms, Michael J. Fossil Crinoids. Cambridge University Press. pp. 216–24. ISBN 978-0-521-52440-7.

11.  Jump up^ Gorzelak, Przemys Law; Rakowicz, Lukasz; Salamon, Mariusz A.; Szrek, Piotr (2011). "Inferred placoderm bite marks on Devonian crinoids from Poland". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 259: 105–12. doi:10.1127/0077-7749/2010/0111.

12.  Jump up^ Brett, Carlton E.; Walker, Sally E. (2002). "Predators and predation in Paleozoic marine environments". Paleontological Society Papers 8: 93–118.

13.  Jump up^ Gahn, Forest J.; Baumiller, Tomasz K. (2003). "Infestation of Middle Devonian (Givetian) camerate crinoids by platyceratid gastropods and its implications for the nature of their biotic interaction". Lethaia 36 (2): 71–82. doi:10.1080/00241160310003072. hdl:2027.42/75509.

14.  Jump up^ Raff, R A; Byrne, M (2006). "The active evolutionary lives of echinoderm larvae". Heredity 97 (3): 244–52. doi:10.1038/sj.hdy.6800866. PMID 16850040.

15.  Jump up^ Baumiller, Tomasz K.; Messing, Charles G. (6 October 2005). "Geological Society of America Abstracts with Programs" 37 (7). p. 62. |chapter= ignored (help)

16.  ^ Jump up to:a b Guensburg, Thomas E.; Mooi, Rich; Sprinkle, James; David, Bruno; Lefebvre, Bertrand (2010). "Pelmatozoan arms from the mid-Cambrian of Australia: Bridging the gap between brachioles and brachials? Comment: There is no bridge". Lethaia 43 (3): 432–40. doi:10.1111/j.1502-3931.2010.00220.x.

17.  ^ Jump up to:a b Foote, Mike (1999). "Morphological diversity in the evolutionary radiation of Paleozoic and post-Paleozoic crinoids". Paleobiology 25 (sp1): 1–116. doi:10.1666/0094-8373(1999)25[1:MDITER]2.0.CO;2. ISSN 0094-8373. JSTOR 2666042.

18.  Jump up^ Baumiller, Tomasz K. (2008). "Crinoid Ecological Morphology". Annual Review of Earth and Planetary Sciences 36: 221. Bibcode:2008AREPS..36..221B.doi:10.1146/annurev.earth.36.031207.124116.

19.  Jump up^ Baumiller, T. K.; Salamon, M. A.; Gorzelak, P.; Mooi, R.; Messing, C. G.; Gahn, F. J. (2010). "Post-Paleozoic crinoid radiation in response to benthic predation preceded the Mesozoic marine revolution". Proceedings of the National Academy of Sciences 107 (13): 5893–6. Bibcode:2010PNAS..107.5893B.doi:10.1073/pnas.0914199107. JSTOR 25665085. PMC 2851891. PMID 20231453. INIST:22572914.

20.  Jump up^ Ponsonby, Dr. David; Prof. George Dussart (2005). The Anatomy of the Sea. Vancouver: Raincoast Books. p. 129. ISBN 0-8118-4633-4.

21.  Jump up^ O'Malley, C. E.; Ausich, W. I.; Chin, Y.-P. (2013). "Isolation and characterization of the earliest taxon-specific organic molecules (Mississippian, Crinoidea)". Geology 41(3): 347. Bibcode:2013Geo....41..347O. doi:10.1130/G33792.1. Lay summary  Phys.org (Feb 19, 2013).

22.  Jump up^ "Identifying Unknown Fossils (by their shape)". Kentucky Geological Survey / University of Kentucky. Retrieved 2009-06-21.

23.  Jump up^ "Office of the Secretary of State, Missouri".

 


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