Table 1.

Comparison of Stillatuberoolithus storrsi, oogen. et oosp. nov. to similar ootaxa. Brackets indicate eggshell thicknesses including ornamentation.

Ootaxon	Age	Formation	Location	Eggshell thickness (mm)	ML:CL	Ornamentation	Reference
Stillatuberoolithus storrsi, oogen. et oosp. nov	Campanian	Kaiparowits	Utah	0.31–0.4 [0.37–0.59]	1:1.1–1:1.5	Dispersituberculate with flat nodes	This paper; Holotype
Laevisoolithidae (diagnosis)				0.3–0.6	2:1–1:1	Smooth	22
Subtiliolithus kachchhensis	Maastrichtian	Lameta	India	[0.35–0.5]	1:1–1:2	Dispersituberculate	19,23
Subtiliolithus kachchhensis (revised)	Maastrichtian	Lameta	India	0.467–0.491	1:1–1:2	Dispersituberculate	27
Subtiliolithus microtuberculatus	Maastrichtian	Nemegt	Mongolia	0.3–0.4	3:1–2:1	Very fine tubercles	21
Subtiliollithus hyogoensis	Albian	Ohyamashimo	Japan	0.22–0.41	1:0.9–1:1.3	Dispersituberculate	25
Laevisoolithus sochavai	Campanian–Maastrichtian	Djadokhta & Nemegt	Mongolia	< 1.0	2:1–1:1	Smooth	21
Tipoolithus achloujensis	Maastrichtian	Irbzer	Morocco	0.4–0.65	1:1–1:2	Dispersituberculate	24
Laevisoolithidae	Maastrichtian		France	0.25–0.37	1:2.5–1:3	Smooth	26
Porituberoolithus warnerensis	Campanian	Kaiparowits	Utah	0.51–0.68 [0.57–0.91]	1:2	Dispersituberculate	4
P. warnerensis	Campanian	Oldman	Alberta	0.5–0.65	1:2	Dispersituberculate	28; Holotype
P. warnerensis	Campanian	Dinosaur Park & Oldman	Alberta			Disperistuberculate & Flat nodes	29
P. warnerensis	Maastrichtian	Willow Creek	Alberta	0.45–0.78 [0.72–1.12]	1:1–1:2	Disperistuberculate & Flat nodes	30
P. warnerensis cf	Santonian	Milk river	Alberta	0.37 [0.71]			31
Porituberoolithus sp.	Campanian	Fruitland	New Mexico	0.31–0.72	1:2	Disperistuberculate & Flat nodes	18
cf. Porituberoolithus	Campanian	Aguja	Texas	[0.57–0.73]	1:2	Flat nodes	32
Pseudogeckoolithus nodosus	Maastrichtian	Tremp	Spain	0.3–0.35	1:7–1:9	Dispersituberculate	33
Pseudogeckoolithus cf. nodosus	Maastrichtian	Densus-Ciula Arén	Romania Spain	0.28 [0.35]	1:3–1:9	Dispersituberculate	34
Pseudogeckoolithus aff. tirboulensis	Santonian Campanian Maastrichtian	Csehbánya Sebes Pui beds	Hungary Romania	0.13–0.22 [0.2–0.25]	1:1–1:6	Dispersituberculate	34
Dimorphoolithus bennetti	Maastrichtian	Hell Creek	Montana	[0.561–0.850]	1:2.5	Bimodal dispersituberculate	35
Anguimorph	Early Cretaceous		Thailand	[0.446–0.537]	n/a	Dispersituberculate	36,37