峨眉龙属(恐龙：蜥脚类)在重庆云阳中侏罗统沙溪庙组的发现

doi:10.19615/j.cnki.1000-3118.181115

古脊椎动物学报 ›› 2019, Vol. 57 ›› Issue (2): 105-116.DOI: 10.19615/j.cnki.1000-3118.181115

峨眉龙属(恐龙：蜥脚类)在重庆云阳中侏罗统沙溪庙组的发现

谭超¹, 代辉¹, 贺建军¹, 张锋¹, 胡旭峰¹, 余海东¹, 李宁¹, 魏光飚², 彭光照³, 叶勇³, 张茜楠⁴^,⁵^,⁶, 任鑫鑫⁴^,⁵^,⁶, 尤海鲁⁴^,⁵^,⁶^,^*()

1 重庆市地质遗迹保护与研究实验室,重庆市地质矿产勘查开发局208水文地质工程地质队重庆 400700
2 重庆市地质调查院重庆 401122
3 自贡恐龙博物馆四川自贡 643013
4 中国科学院古脊椎动物与古人类研究所,中国科学院脊椎动物演化与人类起源重点实验室北京 100044
5 中国科学院生物演化与环境卓越创新中心北京 100044
6 中国科学院大学北京 100049

收稿日期:2018-09-10 出版日期:2019-04-20 发布日期:2019-04-20
基金资助:
中国科学院战略性先导科技专项(B类) (编号)(XDB26000000);国家自然科学基金(批准号)(41688103);国家自然科学基金(批准号)(41872021);国家自然科学基金(批准号)(41472020);重庆市国土资源和房屋管理局《重庆市云阳县普安乡恐龙化石保护与研究》;重庆市博士后科研项目特别资助(编号)资助(Xm2017069)

Discovery of Omeisaurus (Dinosauria: Sauropoda) in the Middle Jurassic Shaximiao Formation of Yunyang, Chongqing, China

TAN Chao¹, DAI Hui¹, HE Jian-Jun¹, ZHANG Feng¹, HU Xu-Feng¹, YU Hai-Dong¹, LI Ning¹, WEI Guang-Biao², PENG Guang-Zhao³, YE Yong³, ZHANG Qian-Nan⁴^,⁵^,⁶, REN Xin-Xin⁴^,⁵^,⁶, YOU Hai-Lu⁴^,⁵^,⁶^,^*()

1 Chongqing Laboratory of Geological Heritage Protection and Research, No. 208 Hydrogeological and Engineering Geological Team, Chongqing Bureau of Geological and Mineral Resource Exploration and Development Chongqing 400700
2 Chongqing Institute of Geological Survey Chongqing 401122
3 Zigong Dinosaur Museum Zigong, Sichuan 643013
4 Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences Beijing 100044
5 CAS Center for Excellence in Life and Paleoenvironment Beijing 100044
6 University of Chinese Academy of Sciences Beijing 100049

Received:2018-09-10 Published:2019-04-20 Online:2019-04-20
Contact: ^*youhailu@ivpp.ac.cn

摘要/Abstract

摘要：

形态学和比较研究表明重庆云阳普安中侏罗统沙溪庙组下段发现的一个脊椎可被归入蜥脚类恐龙峨眉龙属一未定种。该中部颈椎的椎体凹/腔构造非常发育以致其显得更加中空而不是坚实,同时该椎体的长度(不包括其前关节髁)和其后关节面长度和高度平均值的比值很高(5.05)。其他特征还包括：椎体长度约为脊椎全高的两倍,椎体腹面中嵴发育,椎体前关节突嵴板和前关节突间板以及椎体后关节突嵴板和后关节突间板间分别围成深而长的空隙,后关节突椎体横突凹的上半部内有一窝腔,上关节突长而低,向后延伸超出后关节突关节面,神经棘前1/3侧面凹陷,前后向长度约为椎体长度的一半。这一发现揭示了峨眉龙新的形态信息,普安恐龙化石点也代表了该属分布的最东缘。

关键词: 重庆普安, 沙溪庙组, 蜥脚类, 峨眉龙属

Abstract:

A cervical vertebra recovered from the Middle Jurassic Lower Member of the Shaximiao Formation in Town of Puan, Yunyang County, Chongqing is assigned to an species undeterminata of the sauropod dinosaur Omeisaurus based on morphological and comparative study. The centrum of this mid-cervical is much hollower than solider with extremely developed fossa/foramen complex and has a high ratio (5.05) of its anteroposterior length excluding the articular ball divided by the mean value of the posterior articular surface mediolateral width and dorsoventral height. Additional features of this cervical include central length about twice the total vertebral height, a prominent midline keel on the central ventral surface, deep and long cavities bounded by centroprezygapophyseal lamina/ intraprezygapophyseal lamina and centropostzygapophyseal lamina/intrapostzygapophyseal lamina, respectively, a coel on the dorsal half of the postzygapophyseal centrodiapophyseal fossa, long prone epipophysis extending beyond the postzygapophysis facet, anteroposteriorly length of the neural spine about half the length of the centrum, and concavities on the anterior one third lateral surface of the neural spine. Therefore, this discovery reveals new morphological information on Omeisaurus, and this Omeisaurus-bearing Puan dinosaur quarry represents the easternmost occurrence of this genus.

Key words: Puan, Chongqing, Shaximiao Formation, Sauropoda, Omeisaurus

中图分类号:

Q915.864

谭超, 代辉, 贺建军, 张锋, 胡旭峰, 余海东, 李宁, 魏光飚, 彭光照, 叶勇, 张茜楠, 任鑫鑫, 尤海鲁. 峨眉龙属(恐龙：蜥脚类)在重庆云阳中侏罗统沙溪庙组的发现. 古脊椎动物学报, 2019, 57(2): 105-116.

TAN Chao, DAI Hui, HE Jian-Jun, ZHANG Feng, HU Xu-Feng, YU Hai-Dong, LI Ning, WEI Guang-Biao, PENG Guang-Zhao, YE Yong, ZHANG Qian-Nan, REN Xin-Xin, YOU Hai-Lu. Discovery of Omeisaurus (Dinosauria: Sauropoda) in the Middle Jurassic Shaximiao Formation of Yunyang, Chongqing, China. Vertebrata Palasiatica, 2019, 57(2): 105-116.

图/表 5

Fig. 1 The middle cervical vertebra of Omeisaurus sp. (17YP3304-S66) in right lateral (A), left lateral (B) and ventral (C) views based on 3D surface scanning Note the specimen was broken into two parts along the parapophysis-diapophysis cross section

Fig. 2 The middle cervical vertebra of Omeisaurus sp. (17YP3304-S66) Anterior views (A, B) of the broken main part of the cervical, and B (sketch) shows the internal camerate structure with large cavities bounded by thin bony septa. Anterior (C) and posterior (D) views of the cervical Abbreviations: CPOL. centropostzygapophyseal lamina; CPRL. centroprezygapophyseal lamina; TPOL. intrapostzygapophyseal lamina; TPRL. intraprezygapophyseal lamina

Table 1 Scorings for S66, Omeisaurus tianfuensis (O), and Mamenchisaurus youngi (M) in the matrix of Carballido et al. (2017)

	122	123	124	125	126	127	128	129	130	131	132	133	134
S66	1&2	1	1	0	2	3	1	1	0	0	0	0	0
O	0→1&2			1→0				0→1
M	0→1&2				2→3	3→-		0→1
	135	136	139	140	141	142	143	144	145	146	147	148
S66	0	1	0	0	0	1	0	0	0	1	1	1
O		1&2→1		1→0			1→0					0→1
M				1→0		1→0	1→0

Fig. 3 Strict consensus tree showing the phylogenetic relationships of S66

Table 2 Measurements and calculated values of cervical vertebrae of S66 and T 5703 (mm)

	L	H	HPF	WPF	LNS	EI	L/HPF	L/H	LNS/L	HPF/WPF	H-HPF/HPF
S66	720	345	152	133	360	5.05	4.74	2.09	0.50	1.14	1.27
C2	170	-	63	52	-	2.96	2.70	-	-	1.21	-
C3	241	130	80	66	135	3.30	3.01	1.85	0.56	1.21	0.63
C4	368	150	98	92	173	3.87	3.76	2.45	0.47	1.07	0.53
C5	495	167	102	88	252	5.21	4.85	2.96	0.51	1.16	0.64
C6	595	190	165	100	270	4.49	3.61	3.13	0.45	1.65	0.15
C7	670		112	109	280	6.06	5.98	-	0.42	1.03	-
C8	673	190	-	-	310	-	-	3.54	0.46	-	-
C9	770	200	160	275	250	3.54	4.81	3.85	0.32	0.58	0.25
C10	690	260	145	200	220	4	4.76	2.65	0.32	0.73	0.79
C11	640	-	-	-	-	-	-	-	-	-	-
C12	-	-	180	280	-	-	-	-	-	0.64	-

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峨眉龙属(恐龙：蜥脚类)在重庆云阳中侏罗统沙溪庙组的发现

Discovery of Omeisaurus (Dinosauria: Sauropoda) in the Middle Jurassic Shaximiao Formation of Yunyang, Chongqing, China

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