Strata: Eagle Ford Group (upper)
Period: Cretaceous
Grayson Co., TX. Mar. 22, 2009.
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
(ammonites)
| Cretaceous Period (click for Pennsylvanian Period) |
Family: Collignoniceratidae
Genus: Prionocyclus
| Prionocyclus sp.
Strata: Eagle Ford Group (upper) Period: Cretaceous Grayson Co., TX. Mar. 22, 2009. |
Family: Placenticeratidae
Genus: Placenticeras
Placenticeras sp. Strata: Eagle Ford Group Period: Cretaceous Denton Co., TX. 2007. |
Placenticeras sp. Strata: Eagle Ford Group Period: Cretaceous Texas. Dallas Museum NH. |
Placenticeras sp. Strata: Eagle Ford Group Period: Cretaceous Dallas Co., TX. 2005-2006 |
Placenticeras sp. (split) [+]Formation: Eagle Ford Group Period: Cretaceous Dallas, TX. 2006. |
Placenticeras sp. Strata: Eagle Ford Group Period: Cretaceous Collin Co., TX. 4 Jun 2023. |
Placenticeras sp. Strata: Eagle Ford Group Period: Cretaceous Collin Co., TX. 29 April 2017. |
Placenticeras sp. Strata: Eagle Ford Group Period: Cretaceous Collin Co., TX. 30 Sep 2018. |
Family: Acanthoceratidae
Genus: Calycoceras
Calycoceras sp. Strata: Woodbine Period: Cretaceous (95 mya) Tarrant Co., TX. |
Calycoceras sp. Strata: Woodbine Period: Cretaceous (95 mya) Tarrant Co., TX. [by Mercer B] |
This large block crumbled to
pieces after drying. :-(
 Strata: Woodbine Period: Cretaceous (95 mya) Tarrant Co., TX. 8 Aug 2018. |
|
Family: Acanthoceratidae
Genus: Metoicoceras
Metoicoceras sp.
Strata: Eagle Ford Group Period: Cretaceous (94 mya) Dallas Co., TX. Feb. 24, 2007. |
Metoicoceras sp. Strata: Eagle Ford Group Period: Cretaceous (94 mya) Dallas Co., TX. Dallas museum?? |
Metoicoceras sp.
 Strata: Eagle Ford Group Period: Cretaceous (94 mya) Dallas Co., TX. 22 June 2021. |
?? Strata: Eagle Ford Group Period: Cretaceous Denton Co., TX. 2007. |
Metoicoceras sp.
 Strata: Eagle Ford Group Period: Cretaceous (94 mya) Dallas Co., TX. 22 June 2021. |
Metoicoceras sp. Strata: Eagle Ford Group Period: Cretaceous Collin Co., TX. 29 April 2017. |
Family: unknown
Genus: unknown
Family: Acanthoceratidae
Genus: Tarrantoceras
Tarrantoceras sp.  Strata: Eagle Ford Group Period: Cretaceous Denton Co., TX. Nov. 10, 2007. |
Family: Acanthoceratidae
Genus: Mantelliceras
Mantelliceras brazoense Strata: Del Rio Period: Cretaceous (98 mya) McLennan Co., TX. Nov. 17, 2007. |
unknown ammonite Formation: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. July 4, 2008. |
Family: Desmoceratidae
Genus: Desmoceras
Desmoceras sp. Strata: Eagle Ford Group Period: Cretaceous Dallas co.?, TX. [by Shawn H] |
Desmoceras sp. Strata: Eagle Ford Group Period: Cretaceous Dallas co.?, TX. [by Shawn H] |
Family: Lyelliceratidae
Genus: Stoliczkaia
Stoliczkaia scotti ??
[+] Formation: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. Nov. 14, 2008. |
Stoliczkaia scotti ?? [same]
[+]Formation: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. Nov. 14, 2008. |
Stoliczkaia ammonite?
 Formation: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. July 31, 2008. |
Family: Engonoceratidae
Genus: Engonoceras
Engonoceras serpintinum Strata: Pawpaw Shale Period: Cretaceous (98 mya) Denton Co., TX. Sep. 8, 2007. |
Engonoceras serpintinum Formation: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. March 16, 2008. |
Engonoceras serpintinum Strata: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. Feb. 18, 2007. |
Engonoceras stolleyi (?) Strata: Goodland Limestone Period: Cretaceous (103-105 mya) Denton Co., TX. Aug. 18, 2008. |
Engonoceras pierdenale (?) Strata: Glen Rose Limestone Period: Cretaceous (108-113 mya) Glen Rose, TX. Oct. 2006 [by Roz M] |
Engonoceras sp. 
[+]Strata: Goodland Limestone Period: Cretaceous (103-105 mya) Tarrant Co., TX. 2005 |
Engonoceras serpintinum
 Strata: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. 1 Nov 2015 |
Engonoceras serpintinum Strata: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. 31 Jan 2021. |
Engonoceras serpintinum Strata: Pawpaw Shale Period: Cretaceous (98 mya) Tarrant Co., TX. 31 Jan 2021. |
Engonoceras serpintinum Strata: Pawpaw Sh. Period: Cretaceous Loc: Denton Co., TX. 20 Sep 2021. |
Family: Engonoceratidae
Genus: Metengonoceras
Metengonoceras sp. Strata: Mainstreet / Grayson Fm. Period: Cretaceous Tarrant Co., TX. May 19, 2013. |
Metengonoceras sp. Strata: Mainstreet / Grayson Fm. Period: Cretaceous Tarrant Co., TX. 24 April 2017 |
Family: Brancoceratidae
Genus: Mortoniceras
Mortoniceras equidistans
[+]Formation: Duck Creek Fm. Period: Cretaceous (100-101 mya) Tarrant Co., TX. |
Mortoniceras sp. 
[+]Strata: Fort Worth Limestone Period: Cretaceous (100-101 mya) Tarrant Co., TX. 2010. |
Mortoniceras sp. ? (right) Formation: Duck Creek Fm. Period: Cretaceous (100-101 mya) Tarrant Co., TX. Dec. 15, 2007. |
Mortoniceras sp.
[+]Strata: Weno Period: Cretaceous (98 mya) Tarrant Co., TX. May 19, 2013. |
Mortoniceras sp. ammonite
Strata: Weno Period: Cretaceous (98 mya) Tarrant Co., TX. Apr. 16, 2010. |
Mortoniceras sp. Formation: Duck Creek Fm. Period: Cretaceous (100-101 mya) Tarrant Co., TX. 2005 |
Mortoniceras (Angolaites) sp. [formerly Drakeoceras] Strata: Fort Worth? Period: Cretaceous (100 mya) Fort Worth, TX. |
Mortoniceras (Angolaites) sp.
[+][formerly Drakeoceras] Strata: Fort Worth? Period: Cretaceous (100 mya) Tarrant Co., TX. Sep. 9, 2007. |
Mortoniceras (Angolaites) sp. [formerly Drakeoceras] Strata: Fort Worth Period: Cretaceous Tarrant Co., TX. July 7, 2007. |
Mortoniceras sp.
[+]Strata: Weno Limestone Period: Cretaceous (98 mya) Tarrant Co., TX. Aug. 15, 2009. |
 Strata: Fort Worth? Period: Cretaceous (100 mya) Fort Worth, TX. |
A cache of ammonites found close together.  Formation: Duck Creek Period: Cretaceous (100-101 mya) Tarrant Co., TX. no date |
| Drakeoceras
was named by Young (1957). It's type is Drakeoceras
drakei. It was synonymized with Angolaites by Kennedy et al. (1998). |
|
Family: Brancoceratidae
Subfamily: Mojsisovicziinae
Genus: Oxytropidoceras
Oxytropidoceras sp. Strata: Goodland Limestone Period: Cretaceous (103-105 mya) Tarrant Co., TX. |
Oxytropidoceras sp. (view of ribs)
[+]Strata: Goodland Limestone Period: Cretaceous (103-105 mya) Tarrant Co., TX. |
?? Strata: Goodland Limestone? Period: Cretaceous (103-105 mya) Tarrant Co., TX. no date |
Manuiceras sp.?
[+]Strata: Goodland Limestone Period: Cretaceous (103-105 mya) Tarrant Co., TX. 2005 |
Manuiceras sp.? Strata: Goodland Limestone Period: Cretaceous (103-105 mya) Tarrant Co., TX. |
Oxytropidoceras sp. cast Strata: Kiamichi Period: Cretaceous (102 mya) Tarrant Co., TX. April 22, 2012. |
Oxytropidoceras sp. cast Strata: Goodland Limestone Period: Cretaceous (103-105 mya) Denton Co., TX. 2007. |
Oxytropidoceras sp. cast Strata: Kiamichi Period: Cretaceous (102 mya) Tarrant Co., TX. April 14, 2013. |
|
Oxytropidoceras diazi [Adkinsites] Strata: Kiamichi Period: Cretaceous (102 mya) Tarrant Co., TX. 20 May 2019 |
Oxytropidoceras diazi [Adkinsites] Strata: Kiamichi Period: Cretaceous (102 mya) Tarrant Co., TX. 2005 |
Family: Pachydiscidae
Genus: Eopachydiscus
![[+]](fieldtrips/2013-05-19/2013-05-19-4720-800.jpg){kind=link}
![[+]](fieldtrips/2014-06-24/2014-06-24-004-1000.jpg){kind=link}
![[+]](cephalopoda/ammonite13-500.jpg){kind=link}
