Project 5202: B. M. Gee, P. J. Makovicky, C. A. Sidor. 2022. Upside down: ‘Cryobatrachus’ and the lydekkerinid record from Antarctica. Journal of Paleontology. 96 (3):658-683.
Abstract
Temnospondyl amphibians are common in non-marine Triassic assemblages, including in the Fremouw Formation (Lower to Middle Triassic) of Antarctica. Temnospondyls were among the first tetrapods to be collected from Antarctica, but their record from the lower Fremouw Formation has long been tenuous. One taxon, ‘Austrobrachyops jenseni,’ is represented by a type specimen comprising only a partial pterygoid, which is now thought to belong to a dicynodont. A second taxon, ‘Cryobatrachus kitchingi,’ is represented by a type specimen comprising a nearly complete skull, but the specimen is only exposed ventrally, and uncertainty over its ontogenetic maturity and some aspects of its anatomy has led it to be designated as a nomen dubium by previous workers. Here, we redescribe the holotype of ‘C. kitchingi,’ an undertaking that is augmented by tomographic analysis. Most of the original interpretations and reconstructions cannot be substantiated, and some are clearly erroneous. Although originally classified as a lydekkerinid, the purported lydekkerinid characteristics are shown to be unfounded or no longer diagnostic for the family. We instead identify numerous features shared with highly immature capitosaurs, a large-bodied clade documented in the upper Fremouw Formation of Antarctica and elsewhere in the Lower Triassic. Additionally, we describe a newly collected partial skull from the lower Fremouw Formation that represents a relatively mature, small-bodied individual, which we provisionally refer to Lydekkerinidae; this specimen represents the most confident identification of a lydekkerinid from Antarctica to date.Read the article »
Article DOI: 10.1017/jpa.2021.115
Project DOI: 10.7934/P5202, http://dx.doi.org/10.7934/P5202
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 14797 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 360 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 801 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:360/0 |
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MorphoBank Project 5202
MorphoBank Project 5202
- Creation Date:
15 April 2024 - Publication Date:
15 April 2024 - Project views: 418
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Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Bryan Gee Project Administrator | 57 | 1 | 1 | 360 | 0 | 0 | 14797 (14785, 0, 12) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29784' (56 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Proterogyrinus scheelei Last Modified in 04/15/24 | 35 | 325 | 325 | 0 | 0 | 0 | 0 | 1 |
[2] † Greererpeton burkemorani Last Modified in 04/15/24 | 27 | 333 | 333 | 0 | 0 | 0 | 0 | 1 |
[3] † Edops craigi Last Modified in 04/15/24 | 80 | 280 | 280 | 0 | 0 | 0 | 0 | 1 |
[4] † Cochleosaurus bohemicus Last Modified in 04/15/24 | 69 | 291 | 291 | 0 | 0 | 0 | 0 | 1 |
[5] † Dendrerpeton acadianum Last Modified in 04/15/24 | 30 | 330 | 330 | 0 | 0 | 0 | 0 | 1 |
[6] † Balanerpeton woodi Last Modified in 04/15/24 | 28 | 332 | 332 | 0 | 0 | 0 | 0 | 1 |
[7] † Trimerorhachis insignis Last Modified in 04/15/24 | 46 | 314 | 314 | 0 | 0 | 0 | 0 | 1 |
[8] † Acanthostomatops vorax Last Modified in 04/15/24 | 56 | 304 | 304 | 0 | 0 | 0 | 0 | 1 |
[9] † Zatrachys serratus Last Modified in 04/15/24 | 151 | 209 | 209 | 0 | 0 | 0 | 0 | 1 |
[10] † Micromelerpeton credneri Last Modified in 04/15/24 | 107 | 253 | 253 | 0 | 0 | 0 | 0 | 1 |
[11] † Apateon pedestris Last Modified in 04/15/24 | 60 | 300 | 300 | 0 | 0 | 0 | 0 | 1 |
[12] † Micropholis stowi Last Modified in 04/15/24 | 40 | 320 | 320 | 0 | 0 | 0 | 0 | 1 |
[13] † Platyrhinops lyelli Last Modified in 04/15/24 | 50 | 310 | 310 | 0 | 0 | 0 | 0 | 1 |
[14] † Amphibamus grandiceps Last Modified in 04/15/24 | 51 | 309 | 309 | 0 | 0 | 0 | 0 | 1 |
[15] † Doleserpeton annectens Last Modified in 04/15/24 | 47 | 313 | 313 | 0 | 0 | 0 | 0 | 1 |
[16] † Gerobatrachus hottoni Last Modified in 04/15/24 | 123 | 237 | 237 | 0 | 0 | 0 | 0 | 1 |
[17] † Dissorophus multicinctus Last Modified in 04/15/24 | 43 | 317 | 317 | 0 | 0 | 0 | 0 | 1 |
[18] † Cacops morrisi Last Modified in 04/15/24 | 87 | 273 | 273 | 0 | 0 | 0 | 0 | 1 |
[19] † Broiliellus texensis Last Modified in 04/15/24 | 93 | 267 | 267 | 0 | 0 | 0 | 0 | 1 |
[20] † Acheloma cumminsi Last Modified in 04/15/24 | 63 | 297 | 297 | 0 | 0 | 0 | 0 | 1 |
[21] † Phonerpeton pricei Last Modified in 04/15/24 | 76 | 284 | 284 | 0 | 0 | 0 | 0 | 1 |
[22] † Onchiodon labyrinthicus Last Modified in 04/15/24 | 48 | 312 | 312 | 0 | 0 | 0 | 0 | 1 |
[23] † Eryops megacephalus Last Modified in 04/15/24 | 51 | 309 | 309 | 0 | 0 | 0 | 0 | 1 |
[24] † Sclerocephalus haeuseri Last Modified in 04/15/24 | 46 | 314 | 314 | 0 | 0 | 0 | 0 | 1 |
[25] † Glanochthon latirostris Last Modified in 04/15/24 | 59 | 301 | 301 | 0 | 0 | 0 | 0 | 1 |
[26] † Archegosaurus decheni Last Modified in 04/15/24 | 17 | 343 | 343 | 0 | 0 | 0 | 0 | 1 |
[27] † Uranocentrodon senekalensis Last Modified in 04/15/24 | 103 | 257 | 257 | 0 | 0 | 0 | 0 | 1 |
[28] † Broomistega putterilli Last Modified in 04/15/24 | 69 | 291 | 291 | 0 | 0 | 0 | 0 | 1 |
[29] † Lydekkerina huxleyi Last Modified in 04/15/24 | 49 | 311 | 310 | 0 | 0 | 0 | 0 | 1 |
[30] † Chomatobatrachus halei Last Modified in 04/15/24 | 53 | 308 | 307 | 0 | 0 | 0 | 0 | 1 |
[31] † Sangaia lavina Last Modified in 04/15/24 | 157 | 203 | 202 | 0 | 0 | 0 | 0 | 1 |
[32] † Siderops kehli Last Modified in 04/15/24 | 57 | 303 | 303 | 0 | 0 | 0 | 0 | 1 |
[33] † Batrachosuchus watsoni Last Modified in 04/15/24 | 127 | 233 | 233 | 0 | 0 | 0 | 0 | 1 |
[34] † Plagiosuchus pustuliferus Last Modified in 04/15/24 | 74 | 286 | 286 | 0 | 0 | 0 | 0 | 1 |
[35] † Gerrothorax pulcherrimus Last Modified in 04/15/24 | 30 | 330 | 330 | 0 | 0 | 0 | 0 | 1 |
[36] † Edingerella madagascariensis Last Modified in 04/15/24 | 64 | 296 | 296 | 0 | 0 | 0 | 0 | 1 |
[37] † Benthosuchus sushkini Last Modified in 04/15/24 | 56 | 304 | 304 | 0 | 0 | 0 | 0 | 1 |
[38] † Trematosaurus brauni Last Modified in 04/15/24 | 177 | 183 | 183 | 0 | 0 | 0 | 0 | 1 |
[39] † Trematolestes hagdorni Last Modified in 04/15/24 | 59 | 301 | 301 | 0 | 0 | 0 | 0 | 1 |
[40] † Lyrocephaliscus euri Last Modified in 04/15/24 | 142 | 218 | 218 | 0 | 0 | 0 | 0 | 1 |
[41] † Callistomordax kugleri Last Modified in 04/15/24 | 40 | 320 | 320 | 0 | 0 | 0 | 0 | 1 |
[42] † Metoposaurus diagnosticus Last Modified in 04/15/24 | 89 | 271 | 271 | 0 | 0 | 0 | 0 | 1 |
[43] † Parotosuchus nasutus Last Modified in 04/15/24 | 126 | 234 | 234 | 0 | 0 | 0 | 0 | 1 |
[44] † Paracyclotosaurus davidi Last Modified in 04/15/24 | 37 | 323 | 323 | 0 | 0 | 0 | 0 | 1 |
[45] † Cyclotosaurus robustus Last Modified in 04/15/24 | 158 | 202 | 202 | 0 | 0 | 0 | 0 | 1 |
[46] † Mastodonsaurus giganteus Last Modified in 04/15/24 | 26 | 334 | 334 | 0 | 0 | 0 | 0 | 1 |
[47] † Rileymillerus cosgriffi Last Modified in 04/15/24 | 203 | 157 | 157 | 0 | 0 | 0 | 0 | 1 |
[48] † Chinlestegophis jenkinsi Last Modified in 04/15/24 | 166 | 194 | 194 | 0 | 0 | 0 | 0 | 1 |
[49] † Lapillopsis nana Last Modified in 04/15/24 | 110 | 251 | 238 | 0 | 0 | 0 | 0 | 1 |
[50] † Rotaurisaurus contundo Last Modified in 04/15/24 | 235 | 125 | 125 | 0 | 0 | 0 | 0 | 1 |
[51] † Nanolania anatopretia Last Modified in 04/15/24 | 211 | 138 | 138 | 0 | 11 | 0 | 0 | 1 |
[52] † Laidleria gracilis Last Modified in 04/15/24 | 104 | 256 | 256 | 0 | 0 | 0 | 0 | 1 |
[53] † Almasaurus habbazi Last Modified in 04/15/24 | 134 | 227 | 226 | 0 | 0 | 0 | 0 | 1 |
[54] † AMNH FARB 9503 (Colbert/Cosgriff) Last Modified in 04/15/24 | 270 | 90 | 89 | 0 | 1 | 0 | 0 | 1 |
[55] † AMNH FARB 9503 (revised) Last Modified in 04/15/24 | 323 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
[56] † FMNH PR 5020 Last Modified in 04/15/24 | 335 | 25 | 25 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 418 | |
Project overview | 37 | |
Matrix views | 31 | Matrix landing page (26 views); Modified matrix from Pardo et al. (2017) and Schoch et al. (2020) (5 views); |
Media views | 80 | Media search (70 views); M902927 (10 views); |
Documents list | 26 | |
Views for media list | 26 | |
Specimen list | 41 | |
Taxon list | 158 | |
Bibliography | 19 |