Morphobank

Project 4832: A. J. McGowan, A. B. Smith. 2007. Ammonoids across the Permian/Triassic boundary: a cladistic perspective. Palaeontology. 50 (3):573-590.

Specimen: † Episageceras (unvouchered)
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Abstract

The rapid diversification of ceratitid ammonoids during the earliest Mesozoic has been taken at face value as an example of explosive radiation following the Permian/Triassic mass extinction. However, the validity of this interpretation has never been tested within a phylogenetic framework. A total evidence cladistic analysis of Mid–Late Permian and Induan (earliest Triassic) ammonoids confirms the monophyly of the Ceratitida. Partitioned phylogenetic analysis of suture line characters vs. shell shape and ornament characters confirms the importance of suture-line characters for resolving the higher taxonomy of ammonoids. When the cladogram is compared with the observed fossil record, the resultant tree implies that the divergence of a number of early Triassic lineages actually occurred during the latest Permian. If these range extensions are taken into account the ammonoid per-genus extinction rate across the Permian/Triassic boundary drops from c. 85 per cent to c. 60 per cent.

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Article DOI: 10.1111/j.1475-4983.2007.00653.x

Project DOI: 10.7934/P4832, http://dx.doi.org/10.7934/P4832

This project contains	Matrices
1 Media 1 Matrix 1 Document 32 Taxa 1 Specimen 55 Characters Total size of project's media files: 429.92k Download Project SDD File	Total scored cells: 1672 Total media associated with cells: 0 Total labels associated with cell media: 0
	Characters
	Total characters: 55 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 135 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:52/3

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MorphoBank Project 4832

Creation Date:
14 August 2023
Publication Date:
20 August 2023
Project views: 2311

Authors' Institutions

Natural History Museum, London

Members

Joyce Song
Project Administrator

1672
(1672, 0, 0)

Taxonomic Overview for Matrix 'M29442' (32 Taxa)

taxon	unscored cells	scored cells	no cell support	NPA cells	"-" cells	cell images	labels on cell images	member access
[1] † Daraelites Last Modified in 08/14/23	2	53	53	0	0	0	0	1
[2] † Episageceras Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[3] † Medlicottia Last Modified in 08/14/23	5	50	50	0	0	0	0	1
[4] † Discophiceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[5] † Bukkenites Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[6] † Xenodiscus Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[7] † Hypophiceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[8] † Tompophiceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[9] † Paratirolites Last Modified in 08/14/23	1	54	54	0	0	0	0	1
[10] † Aldanoceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[11] † Wordieoceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[12] † Vishnuites Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[13] † Acanthophiceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[14] † Metophiceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[15] † Vavilovites Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[16] † Ophiceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[17] † Ambites Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[18] † Otoceras Last Modified in 08/14/23	0	55	55	0	0	0	0	1
[19] † Araxoceras Last Modified in 08/14/23	1	54	54	0	0	0	0	1
[20] † Anotoceras Last Modified in 08/14/23	1	54	54	0	0	0	0	1
[21] † Agathiceras Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[22] † Adrianites Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[23] † Hyattoceras Last Modified in 08/14/23	7	48	48	0	0	0	0	1
[24] † Cyclobus Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[25] † Vidrioceras Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[26] † Marathonites Last Modified in 08/14/23	5	50	50	0	0	0	0	1
[27] † Metalegoceras Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[28] † Popanoceras Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[29] † Thalassoceras Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[30] † Paragastrioceras Last Modified in 08/14/23	5	50	50	0	0	0	0	1
[31] † Pseudohalorites Last Modified in 08/14/23	6	49	49	0	0	0	0	1
[32] † Imitoceras Last Modified in 08/14/23	7	48	48	0	0	0	0	1

Project views

type	number of views	Individual items viewed (where applicable)
Total project views	2311
Documents list	114
Specimen list	221
Views for media list	131
Matrix views	116	Matrix landing page (111 views); Matrix from PDBD (5 views);
Media views	506	Media search (364 views); M891265 (142 views);
Project overview	163
Bibliography	89
Taxon list	971