Class: Echinoidea - Echinoids
(regular echinoids)
| Cretaceous period (click for Pennsylvanian Period) |
| " Regular echinoids have no front or back end. The opening for the mouth (peristome) is on their underside, and the opening for the anus (periproct) is on top. When viewed from above or below their profile is circular and radially symmetrical " |
"Phymosoma" sp. echinoids:
Phymosoma sp. echinoid Formation: Grayson Period: Cretaceous (95-97 mya) Loc: Tarrant co., Tx. Oct. 1, 2008. |
Phymosoma sp. echinoid Formation: Grayson Period: Cretaceous (95-97 mya) Loc: Tarrant co., Tx. Oct. 1, 2008. |
Phymosoma sp. echinoid Formation: Grayson Period: Cretaceous (95-97 mya) Loc: Tarrant co., Tx. Oct. 1, 2008. |
| Phymosoma sp. echinoid Formation: Grayson Period: Cretaceous (95-97 mya) Loc: Tarrant co., Tx. Aug. 11, 2007. |
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"Tetragramma" echinoids:
| Tetragramma sp. echinoid Formation: Goodland Period: Cretaceous (103-105 mya) Loc: Tarrant co, Tx. July 4, 2008. |
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"Salenia" echinoids:
| Salenia mexicana echinoids Formation: Goodland Period: Cretaceous (103-105 mya) Loc: Tarrant co, Tx. July 12, 2008. |
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| Salenia mexicana echinoid Formation: Goodland Period: Cretaceous (103-105 mya) Loc: Tarrant co, Tx. 2008. |
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Salenia volana Formation: Weno Period: Cretaceous (98-99 mya) Loc: Tarrant co, Tx. Aug 15, 2010. |
Salenia volana (same) Formation: Weno Period: Cretaceous (98-99 mya) Loc: Tarrant co, Tx. Aug 15, 2010. |
Salenia volana (same) Formation: Weno Period: Cretaceous (98-99 mya) Loc: Tarrant co, Tx. Aug 15, 2010. |
Salenia texana Formation: Glen Rose Period: Cretaceous (108-113 mya) Loc: South Texas. Found by DanW. |
Salenia texana (same) Formation: Glen Rose Period: Cretaceous (108-113 mya) Loc: South Texas. Found by DanW. |
Salenia texana (same) Formation: Glen Rose Period: Cretaceous (108-113 mya) Loc: South Texas. Found by DanW. |
"Goniophorus" echinoids:
Goniophorus scotti (top) Formation: Grayson Period: Cretaceous (95-97 mya) Loc: Tarrant co., Tx. Aug. 22, 2009. |
Goniophorus scotti (bottom) Formation: Grayson Period: Cretaceous (95-97 mya) Loc: Tarrant co., Tx. Aug. 22, 2009. |
Goniophorus scotti (side) Formation: Grayson Period: Cretaceous (95-97 mya) Loc: Tarrant co., Tx. Aug. 22, 2009. |
Goniophorus scotti Formation: Grayson Period: Cretaceous (95-97 mya) Loc: Tarrant co., Tx. Oct. 9, 2007. |
Goniophorus echinoid Formation: Fort Worth? Period: Cretaceous (100 mya) Loc: Tarrant co., Tx. Aug. 18, 2007. |
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| L. H.: There seems to be a difference between the Duck Creek/Fort Worth Formation species and the Grayson Formation species (scotti). | ||
Goniophorus sp. echinoid Formation: Duck Creek (upper) Period: Cretaceous (100 mya) Loc: Tarrant co., Tx. Sept. 26, 2009. |
Goniophorus sp. echinoid (side) Formation: Duck Creek (upper) Period: Cretaceous (100 mya) Loc: Tarrant co., Tx. May 10, 2008. |
(same, bottom view) Formation: Duck Creek (upper) Period: Cretaceous (100 mya) Loc: Tarrant co., Tx. May 10, 2008. |
"Goniopygus" echinoids:
Goniopygus budaensis? echinoid  Formation: Denton/ Weno? Period: Cretaceous (98.5-99 mya) Loc: Tarrant co, Tx. Aug. 15, 2010. |
same (side view) Formation: Denton/Weno? Period: Cretaceous (98.5-99 mya) Loc: Tarrant co, Tx. Aug. 15, 2010. |
same (bottom view) Formation: Denton/Weno? Period: Cretaceous (98.5-99 mya) Loc: Tarrant co, Tx. Aug. 15, 2010. |
Goniopygus budaensis? echinoid Formation: Pawpaw Period: Cretaceous (c. 98 mya) Loc: Tarrant co, Tx. Nov. 3, 2007. |
"cidarid" echinoids:
Phyllacanthus sp. [top] Formation: Weno Period: Cretaceous (98-99 mya) Loc: Tarrant co., Tx. [Reid Coll. 2013] |
Phyllacanthus sp. [bottom] Formation: Weno Period: Cretaceous (98-99 mya) Loc: Tarrant co., Tx. [Reid Coll. 2013] |
Phyllacanthus sp. [side]
[+]Formation: Weno Period: Cretaceous (98-99 mya) Loc: Tarrant co., Tx. [Reid Coll. 2013] |
Echinoid spines and plates Formation: Grayson Period: Cretaceous (96-97 mya) Loc: Tarrant co., Tx. Dec. 23, 2006. |
A cidaris type echinoid, plates and spines Formation: Del Rio Period: Cretaceous (98 mya) Loc: McLennan co.,Tx. Nov. 17, 2007. |
A cidaris type echinoid spine Formation: Weno? (uppermost) Period: Cretaceous (98-99 mya) Loc: Tarrant co., Tx. July 2007. |
other echinoids:
| Pedinopsis texana? echinoid Formation: Mainstreet/Grayson Period: Cretaceous (97 mya) Loc: Denton co, Tx. Aug 16, 2008. |
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Leptarbacia sp.? echinoid Formation: Mainstreet Period: Cretaceous (97 mya) Loc: Tarrant co., Tx. [by James Cypert] |
