Oogenus: Krokolithes HIRSCH, 1985
Etymology: Krokos from the Greek, meaning lizard and olithes form the Greek, meaning stone; a common ending for fossil eggs.

Oospecies: wilsoni HIRSCH, 1985
Etymology:

Holotype: UCM 47523A

Locality: UCM Locality 81079, near Parachute, Garfield County, Colorado.

Horizon: Debeque Formation.

Biostratigraphy:

Age: Eocene Epoch, Paleogene Period, Lower Tertiary Subera, Lower Cenozoic Era.

Material: Egg.

Referred material:

UCM 47523B, 47523C, 47523D: Egg.

UCM 47523E: 4 loose eggshell fragments.

UCM 44945: 208 unworn eggshell fragments.

UCM 47525: 5 well preserved eggshell fragments.

UCM 47526: Numerous worn eggshell fragments.

10 worn and 10 unworn eggshell fragments.

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Oospecies: helleri KOHRING & HIRSCH, 1996
Etymology: In honor of Dr. Florian Heller (1905-178) who first described the fossil eggs from Geiseltal (1931)

Holotype: GMH XXII-391a-2/HEC 411-2

Locality: Geiseltal quarry Neumark-Sud XXII near Halle/Saale, Germany.

Horizon: “Obere Mittelkohle”.

Biostratigraphy:

Age: Middle and upper middle Eocene Epoch, Paleogene Period, Lower Tertiary Subera, Lower Cenozoic Era.

Material: Eggshells.

Referred material:

GMN XXII-391a-1/HEC 411-1, XXII-391a-2/HEC 411-4, LVII/HEC 443-1, LEO-1/HEC 443-6, XLI-74/HEC 443-13: Eggshells.