Project 5081: K. Stevens, A. Pohle, R. Hoffmann, A. Immenhauser. 2023. Bayesian inference reveals a complex evolutionary history of belemnites. Palaeontologia Electronica. 26 (1.a13):1-18.
Abstract
Belemnites are an extinct group of Mesozoic coleoid cephalopods, common in Jurassic and Cretaceous marine sedimentary rocks. Despite their significance, their total group phylogeny has rarely been considered in recent decades. In contrast, most researchers restricted the assignment of families to one of the two usually recognized subgroups, the Belemnitina and the Belemnopseina. As for many fossil cephalopods, researchers have been reluctant to employ modern phylogenetic methods to illuminate belemnites' evolutionary history.To overcome the "dead end" of belemnite systematics, we performed the first tip-dated Bayesian analysis of belemnite phylogeny. In our analysis, the Aulacoceratida are found as the monophyletic sister group to belemnites. The Sinobelemnitidae are resolved as paraphyletic and fall outside the Belemnitina and Belemnopseina, which make up the remaining belemnites. Belemnitina is restricted to Jurassic species with generally no or apical furrows. Holcobelidae are sister group to other Belemnopseina. Cylindroteuthids sensu lato (including Oxyteuthidae) are nested within Belemnopseina, contrary to the common hypothesis placing them within the Belemnitina. Duvaliidae and Dicoelitidae are recovered as members of the Belemnopseina, but their precise relationship has to be evaluated based on more taxa and additional characters. We introduce the well-supported unranked clade Pseudoalveolata, which includes Dimitobelidae, Belemnitellidae, and members of the paraphyletic "Belemnopseidae".The phylogeny presented here, based on reproducible and quantitative methods, contrasts with the usually applied authoritative "stratophenetic" approach to belemnite systematics, based on the overemphasis of single characters. This result is considered the basis for future studies on belemnite phylogeny, allowing for a rigorous testing of evolutionary hypotheses.Read the article »
Article DOI: 10.26879/1239
Project DOI: 10.7934/P5081, http://dx.doi.org/10.7934/P5081
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 769 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 29 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 59 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:29/0 |
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MorphoBank Project 5081
MorphoBank Project 5081
- Creation Date:
02 February 2024 - Publication Date:
22 April 2024 - Project views: 478
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
MorphoBank Curator Project Administrator | 27 | 3 | 3 | 29 | 0 | 0 | 769 (653, 0, 116) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29666' (27 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Palaeobelemnopsis sinensis Last Modified in 02/02/24 | 3 | 18 | 18 | 0 | 8 | 0 | 0 | 1 |
[2] † Aulacoceras sulcatum Last Modified in 02/02/24 | 1 | 20 | 20 | 0 | 8 | 0 | 0 | 1 |
[3] † Atractites alpinus Last Modified in 02/02/24 | 1 | 20 | 20 | 0 | 8 | 0 | 0 | 1 |
[4] † Schwegleria feifeli Last Modified in 02/02/24 | 0 | 21 | 21 | 0 | 8 | 0 | 0 | 1 |
[5] † Tohokubelus takaizumii Last Modified in 02/02/24 | 3 | 19 | 19 | 0 | 7 | 0 | 0 | 1 |
[6] † Sinobelemnites cornutus Last Modified in 02/02/24 | 2 | 21 | 21 | 0 | 6 | 0 | 0 | 1 |
[7] † Passaloteuthis bisulcata Last Modified in 02/02/24 | 0 | 21 | 21 | 0 | 8 | 0 | 0 | 1 |
[8] † Acrocoelites oxyconus Last Modified in 02/02/24 | 0 | 21 | 21 | 0 | 8 | 0 | 0 | 1 |
[9] † Megateuthis gigantea Last Modified in 02/02/24 | 0 | 21 | 21 | 0 | 8 | 0 | 0 | 1 |
[10] † Cylindroteuthis puzosiana Last Modified in 02/02/24 | 0 | 24 | 24 | 0 | 5 | 0 | 0 | 1 |
[11] † Belemnopsis apiciconus Last Modified in 02/02/24 | 0 | 27 | 27 | 0 | 2 | 0 | 0 | 1 |
[12] † Hibolites semisulcatus Last Modified in 02/02/24 | 0 | 28 | 28 | 0 | 1 | 0 | 0 | 1 |
[13] † Mesohibolites minaret Last Modified in 02/02/24 | 0 | 28 | 28 | 0 | 1 | 0 | 0 | 1 |
[14] † Neohibolites ewaldi Last Modified in 02/02/24 | 0 | 28 | 28 | 0 | 1 | 0 | 0 | 1 |
[15] † Neohibolites minimus Last Modified in 02/02/24 | 0 | 28 | 28 | 0 | 1 | 0 | 0 | 1 |
[16] † Duvalia grasiana Last Modified in 02/02/24 | 0 | 23 | 23 | 0 | 6 | 0 | 0 | 1 |
[17] † Dicoelites dicoelus Last Modified in 02/02/24 | 2 | 26 | 26 | 0 | 1 | 0 | 0 | 1 |
[18] † Aulacoteuthis ernsti Last Modified in 02/02/24 | 0 | 24 | 24 | 0 | 5 | 0 | 0 | 1 |
[19] † Oxyteuthis brunsvicensis Last Modified in 02/02/24 | 0 | 22 | 22 | 0 | 7 | 0 | 0 | 1 |
[20] † Lissajousibelus harleyi Last Modified in 02/02/24 | 1 | 23 | 23 | 0 | 5 | 0 | 0 | 1 |
[21] † Holcobelus munieri Last Modified in 02/02/24 | 0 | 25 | 25 | 0 | 4 | 0 | 0 | 1 |
[22] † Calabribelus pallinii Last Modified in 02/02/24 | 0 | 27 | 27 | 0 | 2 | 0 | 0 | 1 |
[23] † Dimitobelus diptychus Last Modified in 02/02/24 | 1 | 27 | 27 | 0 | 1 | 0 | 0 | 1 |
[24] † Praeactinocamax plenus Last Modified in 02/02/24 | 0 | 28 | 28 | 0 | 1 | 0 | 0 | 1 |
[25] † Gonioteuthis quadrata Last Modified in 02/02/24 | 0 | 28 | 28 | 0 | 1 | 0 | 0 | 1 |
[26] † Belemnitella propinqua Last Modified in 02/02/24 | 0 | 28 | 28 | 0 | 1 | 0 | 0 | 1 |
[27] † Belemnitella mucronata Last Modified in 02/02/24 | 0 | 27 | 27 | 0 | 2 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 478 | |
Media views | 122 | Media search (80 views); M902002 (13 views); M902001 (16 views); M902000 (13 views); |
Matrix views | 38 | Matrix landing page (31 views); Matrix (7 views); |
Project overview | 39 | |
Bibliography | 18 | |
Views for media list | 29 | |
Specimen list | 81 | |
Taxon list | 151 |