Jagua Formation

Jagua Formation
Stratigraphic range: Mid-Late Oxfordian
~158–156 Ma

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Jagua Formation; Stratigraphic range: Mid-Late Oxfordian; ~158–156 Ma PreЄ Є O S D C P T J K Pg N ↓
Type	Geological formation
Sub-units	Pan de Azucar Member, Zacarias Member, Pimienta Member, Jagua Vieja Member
Underlies	Guasasa Formation
Overlies	San Cayetano Formation
Area	Sierra de los Órganos, Sierra del Rosario
Thickness	160 metres (520 ft)
Lithology
Primary	Shale, Limestone
Location
Coordinates	22°42′N 83°36′W / 22.7°N 83.6°WCoordinates: 22°42′N 83°36′W / 22.7°N 83.6°W
Region	Caribbean
Country	Cuba
Extent	Pinar del Río Province

The Jagua Formation is a Late Jurassic (middle to late Oxfordian^[1]) geologic formation in the Sierra de los Órganos and Sierra del Rosario mountains ranges in Pinar del Río Province, western Cuba. Plesiosaur, pliosaur, pterosaur, metriorhynchid, and turtle remains are among the fossils that have been recovered from its strata. The lithology of the 60 metre thick Jagua Vieja Member consists of black shales and horizontally laminated marly micritic to biomicritic limestones. The latter contains calcareous concretions which the fossils are found in.^[2]

Paleofauna

Paleofauna of the Jagua Formation
Genus	Species	Location	Stratigraphic position	Abundance	Notes	Images
Cacibupteryx^[3]	C. caribensis		Jagua Vieja Member		A rhamphorhynchid pterosaur
Caribemys^[4]	C. oxfordiensis				A pleurodiran turtle
Gallardosaurus^[5]	G. iturraldei	about 8 kilometres (5.0 mi) east of Viñales	Jagua Vieja Member		A pliosaurid	Gallardosaurus
Metriorhynchidae	Metriorhynchidae indet.					Metriorhynchid
Nesodactylus^[3]	N. hesperius				A rhamphorhynchid pterosaur	Sauropod Vinialesaurus
Ophthalmosauridae	Ophthalmosauridae indet.
Sauropoda	Sauropoda indet.
Vinialesaurus^[6]	V. caroli	Viñales			A cryptoclidid plesiosaur

↑ De la Fuente, M. S., & Iturralde-Vinent, M. (2001). A new pleurodiran turtle from the Jagua Formation (Oxfordian) of western Cuba. Journal Information, 75(4).
↑ Iturralde-Vinent, Manuel; Norell, Mark A. (11 April 1996). "Synopsis of Late Jurassic Marine Reptiles from Cuba". American Museum Novitates. American Museum of Natural History: 1–17.
1 2 Barrett, P.M., Butler, R.J., Edwards, N.P., & Milner, A.R. Pterosaur distribution in time and space: an atlas. p61-107. in Flugsaurier: Pterosaur papers in honour of Peter Wellnhofer. 2008. Hone, D.W.E., and Buffetaut, E. (eds). Zitteliana B, 28. 264pp.
↑ A New Pleurodiran Turtle from the Jagua Formation (Oxfordian) of Western Cuba. The Journal of Paleontology, July 2001.
↑ Gasparini, Zulma (2009). "A New Oxfordian Pliosaurid (Plesiosauria, Pliosauridae) in the Caribbean Seaway" (PDF). Palaeontology. 52 (3): 661–669. doi:10.1111/j.1475-4983.2009.00871.x. Archived from the original (pdf) on 2011-07-16.
↑ Gasparini, Z., Bardet, N., and Iturralde-Vinent, M. (2002). "A new cryptoclidid plesiosaur from the Oxfordian (Late Jurassic) of Cuba". Geobios. 35 (2): 201–211. doi:10.1016/s0016-6995(02)00019-0. Archived from the original on 2010-07-02.