Paraelongatoolithus is known solely from Chengguan, Tiantai. The fossil is from the Chichengshan Formation, which is dated to 91–94 million years ago, during the Turonian.[1][3]
Discoveryedit
Fossil eggs are very common in the Tiantai basin, and were first discovered there in the 1950s. Due to better infrastructure, in the 2000s numerous new types of fossil eggs have been discovered in Tiantai. Paraelongatoolithus was first discovered and named in 2010 by the Chinese paleontologists Wang Qiang, Wang Xiaolin, Zhao Zikui, and Jiang Yan'gen.[1]
Descriptionedit
Paraelongatoolithu reticulatus is known from a single incomplete fossil egg. The preserved part is 7.2 cm (3 in) wide and 12.2 cm (5 in) long, but when complete, it was probably about 17 cm (7 in) long.[1] The outer surface of its shell is decorated with nodes and ridges arranged into a net-like, or reticular, pattern. The eggshell is 0.5-0.6 mm thick, excluding the ornamentation.[1] The pores in the eggshell are elliptical and irregularly distributed.[1]
Like all elongatoolithids, Paraelongatoolithus has an eggshell clearly divided into two layers: the cone layer on the inside, and the columnar layer (also known as the continuous layer because the eggshell units form a continuum without well-defined boundaries between them) on the outside.[1][2] In Paraelongatoolithus, both layers have very distinct growth lines, and the columnar layer is twice as thick as the cone layer.[1]
Paraelongatoolithus is very similar to Porituberoolithus, but differs in the ornamentation.[1]
Paleobiologyedit
Even though the sole Paraelongatoolithus specimen was not found with a preserved embryo or incubating parent, paleontologists have found numerous other such associations of elongatoolithids with oviraptorosaurs. Therefore, it is likely that Paraelongatoolithus was laid by an oviraptorosaur.[2]
Referencesedit
^ abcdefghiQ. Wang, X.-L. Wang, Z.-K. Zhao and Y.-G. Jiang. 2010. A new oogenus of Elongatoolithidae from the Upper Cretaceous Chichengshan Formation of Tiantai Basin, Zhejiang Province. Vertebrata PalAsiatica 48(2):111-118
^ abcSimon, D. J. (2014). "Giant Dinosaur (theropod) Eggs of the Oogenus Macroelongatoolithus (Elongatoolithidae) from Southeastern Idaho: Taxonomic, Paleobiogeographic, and Reproductive Implications." (Doctoral dissertation, Montana State University, Bozeman).
^He, H., Wang, X., Wang, Q., Jiang, S., Cheng, X., Zhang, J., ... & Deng, C. (2013). "SIMS zircon U–Pb dating of the Late Cretaceous dinosaur egg-bearing red deposits in the Tiantai Basin, southeastern China." Journal of Asian Earth Sciences, 62, 654-661.
January 05, 2024
paraelongatoolithus, late, cretaceous, oogenus, chinese, fossil, classified, oofamily, elongatoolithidae, which, represents, eggs, oviraptorosaurs, temporal, range, turonian, preꞒ, fossil, classificationbasic, shell, type, ornithoidmorphotype, ornithoid, ratit. Paraelongatoolithus is a late Cretaceous oogenus of Chinese fossil egg classified in the oofamily Elongatoolithidae which represents the eggs of oviraptorosaurs 1 2 ParaelongatoolithusTemporal range Turonian PreꞒ Ꞓ O S D C P T J K Pg N Egg fossil classificationBasic shell type OrnithoidMorphotype Ornithoid ratiteOofamily ElongatoolithidaeOogenus ParaelongatoolithusWang Wang Zhao amp Jiang 2010Oospecies P reticulatus Wang Wang Zhao amp Jiang 2010 type Contents 1 Distribution 2 Discovery 3 Description 4 Paleobiology 5 ReferencesDistribution editParaelongatoolithus is known solely from Chengguan Tiantai The fossil is from the Chichengshan Formation which is dated to 91 94 million years ago during the Turonian 1 3 Discovery editFossil eggs are very common in the Tiantai basin and were first discovered there in the 1950s Due to better infrastructure in the 2000s numerous new types of fossil eggs have been discovered in Tiantai Paraelongatoolithus was first discovered and named in 2010 by the Chinese paleontologists Wang Qiang Wang Xiaolin Zhao Zikui and Jiang Yan gen 1 Description editParaelongatoolithu reticulatus is known from a single incomplete fossil egg The preserved part is 7 2 cm 3 in wide and 12 2 cm 5 in long but when complete it was probably about 17 cm 7 in long 1 The outer surface of its shell is decorated with nodes and ridges arranged into a net like or reticular pattern The eggshell is 0 5 0 6 mm thick excluding the ornamentation 1 The pores in the eggshell are elliptical and irregularly distributed 1 Like all elongatoolithids Paraelongatoolithus has an eggshell clearly divided into two layers the cone layer on the inside and the columnar layer also known as the continuous layer because the eggshell units form a continuum without well defined boundaries between them on the outside 1 2 In Paraelongatoolithus both layers have very distinct growth lines and the columnar layer is twice as thick as the cone layer 1 Paraelongatoolithus is very similar to Porituberoolithus but differs in the ornamentation 1 Paleobiology editEven though the sole Paraelongatoolithus specimen was not found with a preserved embryo or incubating parent paleontologists have found numerous other such associations of elongatoolithids with oviraptorosaurs Therefore it is likely that Paraelongatoolithus was laid by an oviraptorosaur 2 References edit a b c d e f g h i Q Wang X L Wang Z K Zhao and Y G Jiang 2010 A new oogenus of Elongatoolithidae from the Upper Cretaceous Chichengshan Formation of Tiantai Basin Zhejiang Province Vertebrata PalAsiatica 48 2 111 118 a b c Simon D J 2014 Giant Dinosaur theropod Eggs of the Oogenus Macroelongatoolithus Elongatoolithidae from Southeastern Idaho Taxonomic Paleobiogeographic and Reproductive Implications Doctoral dissertation Montana State University Bozeman He H Wang X Wang Q Jiang S Cheng X Zhang J amp Deng C 2013 SIMS zircon U Pb dating of the Late Cretaceous dinosaur egg bearing red deposits in the Tiantai Basin southeastern China Journal of Asian Earth Sciences 62 654 661 Retrieved from https en wikipedia org w index php title Paraelongatoolithus amp oldid 1190798515, wikipedia, wiki, book, books, library,
