Project 3698: A. M. Murray, D. B. Brinkman, D. G. DeMar, G. P. Wilson. 2020. Paddlefish and sturgeon (Chondrostei: Acipenseriformes: Polyodontidae and Acipenseridae) from lower Paleocene deposits of Montana, U.S.A. Journal of Vertebrate Paleontology. 40 (2):e1775091.
Abstract
Paleocene deposits of the Tullock Member of the Fort Union Formation, Montana, U.S.A., have yielded several new specimens of †Polyodon tuberculata, a taxon previously described from the formation, as well as a new genus and species of sturgeon (Acipenseridae). The three new specimens of †P. tuberculata allow us to revise and to confirm previously reported features of the holotype, as well as to describe other features that were not preserved in the single specimen previously known. For example, we observe that (1) the left and right posttemporals overlie the left and right parietals to meet in the midline, (2) the posttemporal has a deep ventral flange, and (3) the parasphenoid extends farther posteriorly than the parietals. The new sturgeon is fairly small, and not well preserved. It can be distinguished from all other acipenserids by a combination of features, including kite-shaped dorsal scutes bearing a strong median ridge, lateral scutes that vary in shape from rhomboid to irregularly shaped elements, a large triangular scute behind the anal fin, and numerous small rhomboid scales covering the caudal skeleton. It cannot be included in any currently known genus and is here named †Engdahlichthys milviaegis, gen. et sp. nov.Read the article »
Article DOI: 10.1080/02724634.2020.1775091
Project DOI: 10.7934/P3698, http://dx.doi.org/10.7934/P3698
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 1075 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 62 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:62/0 |
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MorphoBank Project 3698
MorphoBank Project 3698
- Creation Date:
13 April 2020 - Publication Date:
24 February 2021 - Matrix downloads: 3
Authors' Institutions
- National Museum of Natural History, Smithsonian Institution
- University of Alberta
- University of Washington
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Alison Murray Project Administrator | 0 | 1 | 1 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M27261' (20 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Boreosomus piveteaui Taxon name last Modified on 02/24/21 | 17 | 45 | 45 | 0 | 0 | 0 | 0 | 1 |
[2] † Birgeria groenlandica Taxon name last Modified on 02/24/21 | 15 | 47 | 47 | 0 | 0 | 0 | 0 | 1 |
[3] † Chondrosteus acipenseroides Taxon name last Modified on 02/24/21 | 12 | 50 | 50 | 0 | 0 | 0 | 0 | 1 |
[4] † Peipiaosteus pani Taxon name last Modified on 02/24/21 | 17 | 45 | 45 | 0 | 0 | 0 | 0 | 1 |
[5] Polyodon spathula Taxon name last Modified on 02/24/21 | 6 | 56 | 56 | 0 | 0 | 0 | 0 | 1 |
[6] † Protopsephurus liui Taxon name last Modified on 02/24/21 | 14 | 48 | 48 | 0 | 0 | 0 | 0 | 1 |
[7] † Priscosturion longipinnis Taxon name last Modified on 02/24/21 | 16 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
[8] Huso huso Taxon name last Modified on 02/24/21 | 1 | 61 | 61 | 0 | 0 | 0 | 0 | 1 |
[9] Scaphirhynchus platorhynchus Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[10] Pseudoscaphirhynchus kauffmani Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[11] Pseudoscaphirhynchus hermanni Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[12] Acipenser brevirostrum Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[13] Acipenser stellatus Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[14] † Acipenser ruthenus Taxon name last Modified on 02/24/21 | 1 | 61 | 61 | 0 | 0 | 0 | 0 | 1 |
[15] Acipenser fulvescens Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[16] Acipenser oxyrinchus Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[17] Acipenser transmontanus Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[18] Acipenser baerii Taxon name last Modified on 02/24/21 | 0 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[19] † Anchiacipenser acanthaspis Taxon name last Modified on 02/24/21 | 23 | 39 | 39 | 0 | 0 | 0 | 0 | 1 |
[20] † Engdahlichthys milviaegis Taxon name last Modified on 02/24/21 | 43 | 19 | 19 | 0 | 0 | 0 | 0 | 1 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 114 | |
Matrix downloads | 3 | Data matrix provided by author (3 downloads); |
Project downloads | 111 |