Project 4858: E. D. Grogan, R. Lund. 2009. Two new iniopterygians (Chondrichthyes) from the Mississippian (Serpukhovian) Bear Gulch Limestone of Montana with evidence of a new form of chondrichthyan neurocranium. Acta Zoologica. 90:134-151.
Abstract
The Iniopterygia are Palaeozoic chondrichthyans whose morphology and relationships are poorly understood. The morphology of two new taxa of Iniopterygidae, Rainerichthys zangerli and Papilionichthys stahlae, from the Upper Mississippian of Montana is now described. They exhibit the iniopterygian synapomorphy of dorsolaterally placed pectoral fins. They also display a laterally compressed head and body, a homocercal tail, and a single aspinous dorsal fin originating at approximately mid-body. These taxa differ in upper dental elements, bony cranial plates, body squamation, buccopharyngeal denticles, cranial linking cartilages, palatoquadrate shape, pterygoid articulation, pectoral axis and pectoral girdle shape, and in the robustness of branchial and suprascapular cartilages. The neurocranium is unique among known chondrichthyans in presenting anterior ethmosphenoid and posterior otico-occipital units separated by an intracranial joint. A complete otico-occipital fissure is found posteriorly. One to two pairs of upper parasymphysial whorls and one median lower premandibular symphysial whorl are present. Symphysial whorls were mobile and the cranial complex appears to have been kinetic. Cladistic assessment places these new taxa as basal chondrichthyans below the divergence of the Elasmobranchii and the Euchondrocephali. The range of morphology within known iniopterygians supports rapid diversification and niche specialization in this group of atypical chondrichthyans.Read the article »
Article DOI: 10.1111/j.1463-6395.2008.00371.x
Project DOI: 10.7934/P4858, http://dx.doi.org/10.7934/P4858
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 1253 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 31 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 101 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:31/0 |
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MorphoBank Project 4858
MorphoBank Project 4858
- Creation Date:
02 September 2023 - Publication Date:
04 September 2023 - Project views: 2392
- Matrix downloads: 1
Authors' Institutions
- Carnegie Museum of Natural History
- Saint Joseph's University
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 43 | 1 | 1 | 31 | 0 | 0 | 1253 (1253, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29468' (43 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] Outgroup Last Modified in 09/02/23 | 0 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[2] † Delphyodontos Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[3] Chondricthyia Last Modified in 09/02/23 | 4 | 27 | 27 | 0 | 0 | 0 | 0 | 1 |
[4] † Rainerichthys Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[5] † Belantsea Last Modified in 09/02/23 | 3 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[6] † Netsepoye Last Modified in 09/02/23 | 3 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[7] Chondricthyia Last Modified in 09/02/23 | 3 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[8] Chondricthyia Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[9] † Gregorius rexi Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[10] † Srianta dawsoni Last Modified in 09/02/23 | 3 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[11] † Srianta iarlis Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[12] † Srianta srianta Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[13] † Bealbonn rogaire Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[14] † Heteropetalus Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[15] † Debeerius Last Modified in 09/02/23 | 0 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[16] † Orodus Last Modified in 09/02/23 | 6 | 25 | 25 | 0 | 0 | 0 | 0 | 1 |
[17] Chondricthyia Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[18] † Helodus Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[19] Callorhinchus Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[20] † Physonemus Last Modified in 09/02/23 | 3 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[21] † Echinochimaera meltoni Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[22] † Echinochimaera snyderi Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[23] † Squaloraja Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[24] † Harpagofututor Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[25] † Traquairius nudus Last Modified in 09/02/23 | 5 | 26 | 26 | 0 | 0 | 0 | 0 | 1 |
[26] † Traquairius spinosus Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[27] † Traquairius agkistrocephalus Last Modified in 09/02/23 | 3 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[28] † Menaspis Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[29] Chondricthyia Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[30] † Acanthorhina Last Modified in 09/02/23 | 3 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[31] † Harpacanthus Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[32] † Caseodus Last Modified in 09/02/23 | 3 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[33] † Ornithoprion Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[34] † Stethacanthus altonensis Last Modified in 09/02/23 | 0 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[35] † Falcatus Last Modified in 09/02/23 | 0 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[36] † Damocles Last Modified in 09/02/23 | 0 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[37] † Tristychius Last Modified in 09/02/23 | 1 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
[38] Squalus Last Modified in 09/02/23 | 0 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[39] † Diplodoselache Last Modified in 09/02/23 | 6 | 25 | 25 | 0 | 0 | 0 | 0 | 1 |
[40] † Squatinactis Last Modified in 09/02/23 | 0 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[41] † Hamiltonichthys Last Modified in 09/02/23 | 2 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[42] † Thrinacodont Last Modified in 09/02/23 | 4 | 27 | 27 | 0 | 0 | 0 | 0 | 1 |
[43] † Egertonodus basanus Last Modified in 09/02/23 | 0 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 2392 | |
Project overview | 194 | |
Media views | 433 | Media search (369 views); M894434 (64 views); |
Taxon list | 1093 | |
Views for media list | 136 | |
Documents list | 113 | |
Matrix views | 107 | Matrix landing page (99 views); Grogan and Lund 2009 (8 views); |
Specimen list | 234 | |
Bibliography | 82 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 1 | |
Matrix downloads | 1 | Grogan and Lund 2009 (1 download); |