Project 4741: D. A. A. Mertz. 2017. Phylogeny, diversity, and ecology of the ammonoid superfamily acanthoceratoidea through the Cenomanian and Turonian. Masters Thesis, Bowling Green State University. none:1-121.
Abstract
The data contained within this project form part of a thesis submitted for the degree of Master of Science at Bowling Green State University in 2017.Thesis Abstract:Both increased extinction and decreased origination, caused by rising oceanic anoxia and decreased provincialism, respectively, have been proposed as the cause of the Cenomanian Turonian (C/T) extinction event for ammonoids. Conflicting evidence exists for whether diversity actually dropped across the C/T. This study used the ammonoid superfamily Acanthoceratoidea as a proxy for ammonoids as a whole, particularly focusing on genera found in the Western Interior Seaway (WIS) of North America, including Texas. Ultimately, this study set out to determine 1) whether standing diversity decreased across the C/T boundary in the WIS, 2) whether decreased speciation or increased extinction in ammonoids led to a drop in diversity in the C/T extinction event, 3) how ecology of acanthoceratoid genera changed in relation to the C/T extinction event, and 4) whether these ecological changes indicate rising anoxia as the cause of the extinction. In answering these questions, three phylogenetic analyses were run that recovered the families Acanthoceratidae, Collignoniceratidae, and Vascoceratidae. Pseudotissotiidae was not recovered at all, while Coilopoceratidae was recovered but reclassified as a subfamily of Vascoceratidae. Seven genera were reclassified into new families and one genus into a new subfamily. After calibrating the trees with stratigraphy, I was able to determine that standing diversity dropped modestly across the C/T boundary and the Early/Middle Turonian boundary. I also found an increase in the percentage of genera becoming extinct in the Late Cenomanian, not a decrease in origination. Finally, I used Westermann morphospace to relate shell shape to ecology and mode of life. I found no decrease in morphospace occupation across the C/T boundary. More mobile modes of life expanded at this time. Morphospace iv occupation iv did drop across the Early/Middle Turonian boundary. All changes in morphospace occupation were driven by the family Vascoceratidae, suggesting this family was uniquely able to shift into novel modes of life in response to environmental change.
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Project DOI: 10.7934/P4741, http://dx.doi.org/10.7934/P4741
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 1708 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 50 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 221 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:50/0 |
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MorphoBank Project 4741
MorphoBank Project 4741
- Creation Date:
12 July 2023 - Publication Date:
26 July 2023 - Project views: 2704
Authors' Institutions
- Bowling Green State University
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Joyce Song Project Administrator | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Brooke Long-Fox Full membership | 35 | 1 | 1 | 50 | 0 | 0 | 1708 (1639, 0, 69) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29358' (35 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Acanthoceras Last Modified in 07/26/23 | 0 | 51 | 50 | 0 | 0 | 0 | 0 | 2 |
[2] † Cunningtoniceras Last Modified in 07/26/23 | 1 | 52 | 49 | 0 | 0 | 0 | 0 | 2 |
[3] † Conlinoceras Last Modified in 07/26/23 | 0 | 51 | 49 | 0 | 1 | 0 | 0 | 2 |
[4] † Paraconlinoceras Last Modified in 07/26/23 | 3 | 50 | 46 | 0 | 1 | 0 | 0 | 2 |
[5] † Dunveganoceras Last Modified in 07/26/23 | 0 | 48 | 47 | 0 | 3 | 0 | 0 | 2 |
[6] † Tarrantoceras Last Modified in 07/26/23 | 0 | 53 | 49 | 0 | 1 | 0 | 0 | 2 |
[7] † Plesiacanthoceras Last Modified in 07/26/23 | 2 | 49 | 47 | 0 | 1 | 0 | 0 | 2 |
[8] † Neocardioceras Last Modified in 07/26/23 | 2 | 46 | 46 | 0 | 2 | 0 | 0 | 2 |
[9] † Watinoceras Last Modified in 07/26/23 | 12 | 40 | 37 | 0 | 1 | 0 | 0 | 2 |
[10] † Calycoceras Last Modified in 07/26/23 | 1 | 48 | 46 | 0 | 3 | 0 | 0 | 2 |
[11] † Eucalycoceras Last Modified in 07/26/23 | 5 | 43 | 43 | 0 | 2 | 0 | 0 | 2 |
[12] † Pseudocalycoceras Last Modified in 07/26/23 | 2 | 50 | 47 | 0 | 1 | 0 | 0 | 2 |
[13] † Nigericeras Last Modified in 07/26/23 | 9 | 44 | 40 | 0 | 1 | 0 | 0 | 2 |
[14] † Euomphaloceras Last Modified in 07/26/23 | 1 | 49 | 48 | 0 | 1 | 0 | 0 | 2 |
[15] † Morrowites Last Modified in 07/26/23 | 2 | 47 | 46 | 0 | 2 | 0 | 0 | 2 |
[16] † Kamerunoceras Last Modified in 07/26/23 | 11 | 42 | 38 | 0 | 1 | 0 | 0 | 2 |
[17] † Pseudaspidoceras Last Modified in 07/26/23 | 2 | 48 | 47 | 0 | 1 | 0 | 0 | 2 |
[18] † Romaniceras Last Modified in 07/26/23 | 0 | 50 | 49 | 0 | 1 | 0 | 0 | 2 |
[19] † Metoicoceras Last Modified in 07/26/23 | 0 | 54 | 49 | 0 | 1 | 0 | 0 | 2 |
[20] † Spathites Last Modified in 07/26/23 | 4 | 49 | 43 | 0 | 3 | 0 | 0 | 2 |
[21] † Mammites Last Modified in 07/26/23 | 2 | 47 | 46 | 0 | 2 | 0 | 0 | 2 |
[22] † Vascoceras Last Modified in 07/26/23 | 1 | 46 | 46 | 0 | 3 | 0 | 0 | 2 |
[23] † Neoptychites Last Modified in 07/26/23 | 1 | 42 | 42 | 0 | 7 | 0 | 0 | 2 |
[24] † Fagesia Last Modified in 07/26/23 | 0 | 46 | 46 | 0 | 4 | 0 | 0 | 2 |
[25] † Infabricaticeras Last Modified in 07/26/23 | 9 | 40 | 39 | 0 | 2 | 0 | 0 | 2 |
[26] † Rubroceras Last Modified in 07/26/23 | 4 | 48 | 46 | 0 | 0 | 0 | 0 | 2 |
[27] † Choffaticeras Last Modified in 07/26/23 | 4 | 41 | 39 | 0 | 7 | 0 | 0 | 2 |
[28] † Hourcquia Last Modified in 07/26/23 | 8 | 43 | 42 | 0 | 0 | 0 | 0 | 2 |
[29] † Cibolaites Last Modified in 07/26/23 | 3 | 47 | 47 | 0 | 0 | 0 | 0 | 2 |
[30] † Collignoniceras Last Modified in 07/26/23 | 1 | 52 | 49 | 0 | 0 | 0 | 0 | 2 |
[31] † Barroisiceras Last Modified in 07/26/23 | 6 | 44 | 43 | 0 | 1 | 0 | 0 | 2 |
[32] † Hoplitoides Last Modified in 07/26/23 | 5 | 38 | 38 | 0 | 7 | 0 | 0 | 2 |
[33] † Coilopoceras Last Modified in 07/26/23 | 2 | 43 | 42 | 0 | 6 | 0 | 0 | 2 |
[34] † Prionocyclus Last Modified in 07/26/23 | 2 | 54 | 48 | 0 | 0 | 0 | 0 | 2 |
[35] † Sumitomoceras Last Modified in 07/26/23 | 3 | 44 | 44 | 0 | 3 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 2704 | |
Project overview | 227 | |
Media views | 491 | Media search (421 views); M890315 (70 views); |
Matrix views | 150 | Matrix landing page (143 views); Matrix from Mertz 2017 (7 views); |
Documents list | 124 | |
Bibliography | 93 | |
Views for media list | 147 | |
Specimen list | 246 | |
Taxon list | 1226 |