Morphobank

Project 5463: P. M. Thorne, M. Ruta, M. J. Benton. 2011. Resetting the evolution of marine reptiles at the Triassic-Jurassic boundary. Proceedings of the National Academy of Sciences. 108 (20):8339-8344.

Specimen: † Ophthalmosaurus (unvouchered)
View: Entire skeleton

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Abstract

Ichthyosaurs were important marine predators in the Early Jurassic, and an abundant and diverse component of Mesozoic marine ecosystems. Despite their ecological importance, however, the Early Jurassic species represent a reduced remnant of their former significance in the Triassic. Ichthyosaurs passed through an evolutionary bottleneck at, or close to, the Triassic-Jurassic boundary, which reduced their diversity to as few as three or four lineages. Diversity bounced back to some extent in the aftermath of the end-Triassic mass extinction, but disparity remained at less than one-tenth of pre-extinction levels, and never recovered. The group remained at low diversity and disparity for its final 100 Myr. The end-Triassic mass extinction had a previously unsuspected profound effect in resetting the evolution of apex marine predators of the Mesozoic.

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Article DOI: 10.1073/pnas.1018959108

Project DOI: 10.7934/P5463, http://dx.doi.org/10.7934/P5463

This project contains	Matrices
5 Media 1 Matrix 1 Document 32 Taxa 4 Specimens 105 Characters Total size of project's media files: 1.06M Download Project SDD File	Total scored cells: 2268 Total media associated with cells: 0 Total labels associated with cell media: 0
	Characters
	Total characters: 105 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 247 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:105/0

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MorphoBank Project 5463

Creation Date:
15 August 2024
Publication Date:
15 August 2024

Authors' Institutions

University of Bristol

Members

Cidambi Gopal
Project Administrator

105

2268
(2268, 0, 0)

Taxonomic Overview for Matrix 'M30078' (32 Taxa)

taxon	unscored cells	scored cells	no cell support	NPA cells	"-" cells	cell images	labels on cell images	member access
[1] † Petrolacosaurus Taxon name last Modified on 08/15/24	3	102	102	0	0	0	0	1
[2] † Utatsusaurus Taxon name last Modified on 08/15/24	3	102	102	0	0	0	0	1
[3] † Grippia Taxon name last Modified on 08/15/24	30	75	75	0	0	0	0	1
[4] † Parvinatator Taxon name last Modified on 08/15/24	72	33	33	0	0	0	0	1
[5] † Chaohusaurus Taxon name last Modified on 08/15/24	40	66	65	0	0	0	0	1
[6] † Cymbospondylus Taxon name last Modified on 08/15/24	17	100	88	0	0	0	0	1
[7] † Mixosaurus Taxon name last Modified on 08/15/24	10	101	95	0	0	0	0	1
[8] † Phalarodon Taxon name last Modified on 08/15/24	44	64	61	0	0	0	0	1
[9] † Xinminosaurus Taxon name last Modified on 08/15/24	70	35	35	0	0	0	0	1
[10] † Besanosaurus Taxon name last Modified on 08/15/24	65	40	40	0	0	0	0	1
[11] † Shastasaurus Taxon name last Modified on 08/15/24	62	43	43	0	0	0	0	1
[12] † Shonisaurus Taxon name last Modified on 08/15/24	53	53	52	0	0	0	0	1
[13] † Callawayia Taxon name last Modified on 08/15/24	26	86	79	0	0	0	0	1
[14] † Guizhouichthyosaurus Taxon name last Modified on 08/15/24	68	37	37	0	0	0	0	1
[15] † Californosaurus Taxon name last Modified on 08/15/24	66	39	39	0	0	0	0	1
[16] † Toretocnemus Taxon name last Modified on 08/15/24	57	48	48	0	0	0	0	1
[17] † Qianichthyosaurus Taxon name last Modified on 08/15/24	37	69	68	0	0	0	0	1
[18] † Hudsonelpidia Taxon name last Modified on 08/15/24	64	43	41	0	0	0	0	1
[19] † Macgowania Taxon name last Modified on 08/15/24	54	53	51	0	0	0	0	1
[20] † Suevoleviathan Taxon name last Modified on 08/15/24	15	92	90	0	0	0	0	1
[21] † Temnodontosaurus Taxon name last Modified on 08/15/24	3	107	102	0	0	0	0	1
[22] † Leptonectes Taxon name last Modified on 08/15/24	5	109	100	0	0	0	0	1
[23] † Excalibosaurus Taxon name last Modified on 08/15/24	45	60	60	0	0	0	0	1
[24] † Eurhinosaurus Taxon name last Modified on 08/15/24	13	93	92	0	0	0	0	1
[25] † Ichthyosaurus Taxon name last Modified on 08/15/24	0	110	105	0	0	0	0	1
[26] † Stenopterygius Taxon name last Modified on 08/15/24	2	107	103	0	0	0	0	1
[27] † Brachypterygius Taxon name last Modified on 08/15/24	43	63	62	0	0	0	0	1
[28] † Ophthalmosaurus Taxon name last Modified on 08/15/24	3	102	102	0	0	0	0	1
[29] † Aegirosaurus Taxon name last Modified on 08/15/24	36	69	69	0	0	0	0	1
[30] † Caypullisaurus Taxon name last Modified on 08/15/24	45	60	60	0	0	0	0	1
[31] † Platypterygius Taxon name last Modified on 08/15/24	23	88	82	0	0	0	0	1
[32] † Maiaspondylus Taxon name last Modified on 08/15/24	86	19	19	0	0	0	0	1

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type	number of downloads	Individual items downloaded (where applicable)
Total downloads from project	1
Document downloads	1	(1 download);