New turtle egg fossil from the Upper Cretaceous of the Laiyang Basin, Shandong Province, China

WANG, QIANG; WANG, XIAOLIN; ZHAO, ZIKUI; ZHANG, JIALIANG; JIANG, SHUNXING

doi:10.1590/S0001-37652013000100008

person QIANG WANG

schoolKey Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China

person XIAOLIN WANG

schoolKey Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China

person ZIKUI ZHAO

schoolKey Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China

person JIALIANG ZHANG

schoolKey Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, ChinaschoolUniversity of Chinese Academy of Sciences, Beijing, China

person SHUNXING JIANG

schoolKey Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, ChinaschoolUniversity of Chinese Academy of Sciences, Beijing, China

Correspondence to: Xiaolin Wang, E-mail:
wangxiaolin@ivpp.ac.cn

Ootaxon	Age	Location	Shell morphotype/egg shape	Egg size (mm)	Shell unit height-to-width ratio	Shell thickness (µm)	Shell units	References
Testudoolithus hirschi	Jurassic	Portugal	Rigid	?	1: 3	150	Parallel	Kohring (1999)
Unnamed	Early Cretaceous	Japan	Rigid/round or slightly elliptical	25 –27.5	8:5 –2:1*	200 – 250 or 400 – 430	Parallel*	Isaji et al. (2006)
Emydoolithus laiyangensis	Late Cretaceous	China	Rigid/elliptical	25 ×91	2:1 – 5:1	400 – 500	Parallel	This paper
Testudoolithus jiangi	Cretaceous	China	Rigid/round	42×45	2:1 – 5:2	500 – 700	Parallel	Fang et al. (2003), Jackson et al. (2008)
Testudinovum (egg containing embryo)	Cretaceous	Mongolia	Rigid/round	35×40	?	180(1991), 300 – 400 (1994)	Parallel	Mikhailov (1991, 1997), Mikhailov et al. (1994)
Unnamed (egg containing embryo)	Cretaceous	USA	Rigid/slightly elliptical	30×40	?	676	Slightly flared domed	Jackson et al. (2002)
Testudoolithus rigidus	Cretaceous-Pliocene	Various location	Rigid/round	42×47	2:1	220 –250	Parallel	Hirsch and Bray, (1988), Hirsch (1996), Kohring (1999)
Haininchelys curiosa	Paleocene	Germany	Rigid/round	?	2:1	110 –240	Parallel	Schleich et al. (1988)
Testudinarum ovum	Paleocene Miocene	Germany	Rigid/round	?	2:1	50 –130	Parallel	Schleich and Kästle (1988), Schleich et al. (1988)
Unnamed	Oligocene	USA	Rigid	43×47	?	?	?	Hay (1908), Hirsch and Bray (1988), Hirsch (1996)
Unnamed	Miocene	Venezuela	Rigid/elliptical	43.5×56.5	5:3	565 –730	Flared	Winkler and Sánchez-Villagra (2006)

[TFN01t01] ^*
Calculate shell unit height-to-width ratio by the description of the reference (Isaji et al. 2006).

New turtle egg fossil from the Upper Cretaceous of the Laiyang Basin, Shandong Province, China

Abstract