taxonID	type	description	language	source
D77A9E56FFDEFFAFFF1CF8F9CD7865F8.taxon	diagnosis	Diagnosis: Elongate, asymmetrical eggs; paired eggs arranged in a circular clutch; the polar axis length from 10.0 cm – 21.0 cm, and equatorial diameter from 5 cm – 9 cm, prominent nodes or ridges ornamentation on the outer surface; eggshell composed of the cone layer and the columnar layer, eggshell thickness ranges from 0.30 mm – 2.00 mm.	en	Wang, Qiang, Zhao, Zikui, Wang, Xiaolin, Li, Ning, Zou, Songlin (2013): A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China. Zootaxa 3746 (1): 194-200, DOI: 10.11646/zootaxa.3746.1.9
D77A9E56FFDEFFAFFF1CF8F9CD7865F8.taxon	materials_examined	Type oogenus: Elongatoolithus, Macroolithus, Nanhsiungoolithus (Zhao 1975), Heishanoolithus (Zhao & Zhao, 1999), Paraelongatoolithus (Wang et al. 2010), Trachoolithus (Mikhailov 1994, 1997), and Ellipsoolithus (Mohabey 1998).	en	Wang, Qiang, Zhao, Zikui, Wang, Xiaolin, Li, Ning, Zou, Songlin (2013): A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China. Zootaxa 3746 (1): 194-200, DOI: 10.11646/zootaxa.3746.1.9
D77A9E56FFDCFFACFF1CFF2ECE86643F.taxon	etymology	Etymology: From ‘ undulatus ’, Latin for ‘ wavy’, in reference to the undulating appearance of the eggshell ornamentation in radial section.	en	Wang, Qiang, Zhao, Zikui, Wang, Xiaolin, Li, Ning, Zou, Songlin (2013): A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China. Zootaxa 3746 (1): 194-200, DOI: 10.11646/zootaxa.3746.1.9
D77A9E56FFDCFFACFF1CFF2ECE86643F.taxon	diagnosis	Diagnosis: As for the type and only oospecies.	en	Wang, Qiang, Zhao, Zikui, Wang, Xiaolin, Li, Ning, Zou, Songlin (2013): A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China. Zootaxa 3746 (1): 194-200, DOI: 10.11646/zootaxa.3746.1.9
D77A9E56FFDCFFADFF1CFE2BCF93643F.taxon	materials_examined	Holotype: A clutch with 5 more or less well preserved eggs and 3 broken eggs (PXMV- 0016) (Fig. 2), housed in the Pingxiang Museum, Jiangxi Province. Locality and horizon: Changxi (Fig. 1), Pingxiang City; Zhoutian Formation, Upper Cretaceous.	en	Wang, Qiang, Zhao, Zikui, Wang, Xiaolin, Li, Ning, Zou, Songlin (2013): A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China. Zootaxa 3746 (1): 194-200, DOI: 10.11646/zootaxa.3746.1.9
D77A9E56FFDCFFADFF1CFE2BCF93643F.taxon	etymology	Etymology: The oospecific epithet honors the late Peng Anbao, chief curator of the Pingxiang Museum, who collected and protected the dinosaur eggs from the Pingxiang Basin.	en	Wang, Qiang, Zhao, Zikui, Wang, Xiaolin, Li, Ning, Zou, Songlin (2013): A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China. Zootaxa 3746 (1): 194-200, DOI: 10.11646/zootaxa.3746.1.9
D77A9E56FFDCFFADFF1CFE2BCF93643F.taxon	diagnosis	Diagnosis: Elongated egg type with a polar axis length of about 19.36 cm and equatorial diameter of 8.35 cm, giving a shape index is 43.1. The outer surface of the eggshell is sculptured with nodes and longitudinally aligned ridges, and the ridges is 0.67 mm in height, about half of the entire eggshell thickness. The eggshell thickness is 0.78 mm (excluding ornamentation) or 1.46 mm (including ornamentation). Cone layer is thin, 1 / 8 or 1 / 4 of eggshell thickness. There is gradational boundary between cone layer and columnar layer.	en	Wang, Qiang, Zhao, Zikui, Wang, Xiaolin, Li, Ning, Zou, Songlin (2013): A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China. Zootaxa 3746 (1): 194-200, DOI: 10.11646/zootaxa.3746.1.9
D77A9E56FFDCFFADFF1CFE2BCF93643F.taxon	description	Description: All the eggs are paired, and arranged in a circular configuration with the central part about 10 cm in diameter (Fig. 2 A). The angle between pairs is 45.5 – 107 degrees (Fig. 2 B). The eggs are slightly asymmetrical and elongate, with average polar axis length and equatorial diameter of 19.36 cm and 8.35 cm, respectively (Table 1). They are positioned with the blunt pole toward the centre of the nest and the narrow pole directing outwards. The outer surface of the eggshell is sculptured, with the ornamentation pattern consisting of distinct nodes and short ridges that look like nodes coalesced. Both poles are always ornamented with irregularly shaped nodes (Fig. 3 A). These ridges are parallel to one another or bifurcate in the equatorial part (Fig. 3 B, C), and from 2.00 mm to 5.81 mm long. The flat interspaces between the ridges are 0.23 - 0.71 mm wide. The eggshell thickness ranges from 0.78 mm (measured from the level of the cone apices to the valley between ridges) to 1.46 mm (measured including the ridges). The ridges have a height of 0.67 mm, about half of the total eggshell thickness (Fig. 4 A, B). The eggshell consists of the cone layer and the columnar layer. The contact between the cone layer and the overlying columnar layer is gradational (Fig. 4 A, B). The cones are conical and closely packed (Fig. 4 A, C, D). As part of cones eroded, so the cone layer is not complete and thinner than the actual thickness, especially they are little organic cores can be seen in the eggshell radial section (Fig. 4 A, C). The thickness of the cone layer is approaching 0.15 mm, and the thickness of the columnar layer is 0.62 mm (excluding ornamentation) or 1.29 mm (including ornamentation), respectively. Thickness ratio of the two layers is 1 / 8 or 1 / 4. The growth (accretion) lines undulate along with the outer sculptured surface, especially in the upper part of the columnar layer (Fig. 4 A, B). Oval to elliptical pores penetrating the columnar layer are visible in tangential sections (Fig. 4 D), with the pore diameter ranging from 0.14 - 0.18 mm.	en	Wang, Qiang, Zhao, Zikui, Wang, Xiaolin, Li, Ning, Zou, Songlin (2013): A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China. Zootaxa 3746 (1): 194-200, DOI: 10.11646/zootaxa.3746.1.9
