Project 5154: A. Averianov, T. Martin, A. Lopatin, S. Krasnolutskii. 2015. Stem therian mammal Amphibetulimus from the Middle Jurassic of Siberia. Paläontologische Zeitschrift. 89 (2):197-206.
Abstract
Amphibetulimus krasnolutskii is known from the Middle Jurassic (Bathonian) Itat Formation of Krasnoyarsk Territory, West Siberia, Russia, by several edentulous and three dentigerous dental fragments, preserving p1, antepenultimate, and ultimate lower molars, and by an upper molar. It is unique among stem therians by widely open trigonids on the posterior lower molars, paraconids that are higher than the metaconids and have keeled mesiolingual vertical crests, pronounced unilateral hypsodonty of the lower molars and correlated unequal alveolar borders of the dentary ramus, and a linear Meckelian groove that is not connected to the mandibular foramen and extends along the pterygoid ridge. Amphibetulimus differs from more derived stem therians by a simple unicuspid talonid without an incipient talonid basin and a distinct labial cingulum on the upper molars. The lack of an ectotympanic facet and the long linear Meckelian groove extending onto the pterygoid ridge suggest that Amphibetulimus had a derived state of the transitional mammalian middle ear, where the ear ossicles were connected to the dentary not by a thick “ossified” Meckelian cartilage, but by a thin Meckelian cartilage, as in prenatal and early postnatal stages of some modern therians.Read the article »
Article DOI: 10.1007/s12542-013-0217-x
Project DOI: 10.7934/P5154, http://dx.doi.org/10.7934/P5154
| This project contains | Matrices |
|---|---|
Download Project SDD File  | Total scored cells: 1348 Total media associated with cells: 0 Total labels associated with cell media: 0 |
| Characters | |
| Total characters: 48 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 123 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:48/0 |
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MorphoBank Project 5154
MorphoBank Project 5154
- Creation Date:
26 March 2024 - Publication Date:
27 March 2024 - Project views: 754
Authors' Institutions
- Saint Petersburg State University
- Rheinische Friedrich-Wilhelms-Universität Bonn (University of Bonn)
- Zoological Institute of the Russian Academy of Sciences
- Sharypovo Regional Museum
- Borissyak Paleontological Institute of the Russian Academy of Sciences
Members
| member name | taxa |
specimens |
media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
| Shreya Jariwala Project Administrator | 44 | 4 | 4 | 48 | 0 | 0 | 1348 (1348, 0, 0) | 0 | 0 | 0 | ||||
Taxonomic Overview for Matrix 'M29739' (44 Taxa)
| taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
| [1] † Phascolotherium bucklandi Last Modified in 03/26/24 | 33 | 15 | 15 | 0 | 0 | 0 | 0 | 1 |
| [2] † Amphilestes broderipi Last Modified in 03/26/24 | 33 | 15 | 15 | 0 | 0 | 0 | 0 | 1 |
| [3] † Tinodon bellus Last Modified in 03/26/24 | 16 | 32 | 32 | 0 | 0 | 0 | 0 | 1 |
| [4] † Yermakia domitor Last Modified in 03/26/24 | 16 | 32 | 32 | 0 | 0 | 0 | 0 | 1 |
| [5] † Gobiotheriodon infinitus Last Modified in 03/26/24 | 26 | 22 | 22 | 0 | 0 | 0 | 0 | 1 |
| [6] † Kiyatherium cardiodens Last Modified in 03/26/24 | 4 | 44 | 44 | 0 | 0 | 0 | 0 | 1 |
| [7] † Zhangheotherium quiquecuspidens Last Modified in 03/26/24 | 18 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
| [8] † Maotherium sinense Last Modified in 03/26/24 | 3 | 45 | 45 | 0 | 0 | 0 | 0 | 1 |
| [9] † Maotherium asiaticum Last Modified in 03/26/24 | 10 | 38 | 38 | 0 | 0 | 0 | 0 | 1 |
| [10] † Spalacotherium tricuspidens Last Modified in 03/26/24 | 7 | 41 | 41 | 0 | 0 | 0 | 0 | 1 |
| [11] † Spalacolestes cretulablatta Last Modified in 03/26/24 | 25 | 23 | 23 | 0 | 0 | 0 | 0 | 1 |
| [12] † Groebertherium stipanicici Last Modified in 03/26/24 | 33 | 15 | 15 | 0 | 0 | 0 | 0 | 1 |
| [13] † Dryolestes priscus Last Modified in 03/26/24 | 13 | 35 | 35 | 0 | 0 | 0 | 0 | 1 |
| [14] † Dryolestes leiriensis Last Modified in 03/26/24 | 0 | 48 | 48 | 0 | 0 | 0 | 0 | 1 |
| [15] † Laolestes eminens Last Modified in 03/26/24 | 4 | 45 | 44 | 0 | 0 | 0 | 0 | 1 |
| [16] † Krebsotherium lusitanicum Last Modified in 03/26/24 | 2 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
| [17] † Guimarotodus inflatus Last Modified in 03/26/24 | 33 | 15 | 15 | 0 | 0 | 0 | 0 | 1 |
| [18] † Amblotherium gracile Last Modified in 03/26/24 | 10 | 38 | 38 | 0 | 0 | 0 | 0 | 1 |
| [19] † Amblotherium pusillum Last Modified in 03/26/24 | 10 | 38 | 38 | 0 | 0 | 0 | 0 | 1 |
| [20] † Achyrodon nanus Last Modified in 03/26/24 | 6 | 42 | 42 | 0 | 0 | 0 | 0 | 1 |
| [21] † Phascolestes mustelulus Last Modified in 03/26/24 | 3 | 46 | 45 | 0 | 0 | 0 | 0 | 1 |
| [22] † Crusafontia cuencana Last Modified in 03/26/24 | 14 | 34 | 34 | 0 | 0 | 0 | 0 | 1 |
| [23] † Euthlastus cordiformis Last Modified in 03/26/24 | 28 | 20 | 20 | 0 | 0 | 0 | 0 | 1 |
| [24] † Tathiodon agilis Last Modified in 03/26/24 | 28 | 20 | 20 | 0 | 0 | 0 | 0 | 1 |
| [25] † Paurodon valens Last Modified in 03/26/24 | 11 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
| [26] † Henkelotherium guimarotae Last Modified in 03/26/24 | 10 | 38 | 38 | 0 | 0 | 0 | 0 | 1 |
| [27] † Drescheratherium acutum Last Modified in 03/26/24 | 17 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
| [28] † Amphitherium prevostii Last Modified in 03/26/24 | 32 | 17 | 16 | 0 | 0 | 0 | 0 | 1 |
| [29] † Palaeoxonodon ooliticus Last Modified in 03/26/24 | 30 | 18 | 18 | 0 | 0 | 0 | 0 | 1 |
| [30] † Amphibetulimus krasnolutskii Last Modified in 03/26/24 | 48 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| [31] † Nanolestes drescherae Last Modified in 03/26/24 | 10 | 38 | 38 | 0 | 0 | 0 | 0 | 1 |
| [32] † Arguimus khosbajari Last Modified in 03/26/24 | 36 | 12 | 12 | 0 | 0 | 0 | 0 | 1 |
| [33] † Mozomus shikamai Last Modified in 03/26/24 | 37 | 11 | 11 | 0 | 0 | 0 | 0 | 1 |
| [34] † Peramus tenuirostris Last Modified in 03/26/24 | 7 | 41 | 41 | 0 | 0 | 0 | 0 | 1 |
| [35] † Kielantherium gobiensis Last Modified in 03/26/24 | 29 | 19 | 19 | 0 | 0 | 0 | 0 | 1 |
| [36] † Prokennalestes spp Last Modified in 03/26/24 | 2 | 47 | 46 | 0 | 0 | 0 | 0 | 1 |
| [37] † Vincelestes neuquenianus Last Modified in 03/26/24 | 4 | 44 | 44 | 0 | 0 | 0 | 0 | 1 |
| [38] † Cronopio dentiacutus Last Modified in 03/26/24 | 10 | 39 | 38 | 0 | 0 | 0 | 0 | 1 |
| [39] † Leonardus cuspidatus Last Modified in 03/26/24 | 22 | 26 | 26 | 0 | 0 | 0 | 0 | 1 |
| [40] † Reigitherium bunodontum Last Modified in 03/26/24 | 33 | 15 | 15 | 0 | 0 | 0 | 0 | 1 |
| [41] † Mesungulatum houssayi Last Modified in 03/26/24 | 24 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
| [42] † Coloniatherium cilinskii Last Modified in 03/26/24 | 7 | 42 | 41 | 0 | 0 | 0 | 0 | 1 |
| [43] † Peligrotherium tropicalis Last Modified in 03/26/24 | 11 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
| [44] † Necrolestes patagonensis Last Modified in 03/26/24 | 15 | 33 | 33 | 0 | 0 | 0 | 0 | 1 |
Project views
| type | number of views | Individual items viewed (where applicable) |
| Total project views | 754 | |
| Documents list | 28 | |
| Project overview | 40 | |
| Media views | 165 | Media search (103 views); M902706 (17 views); M902705 (14 views); M902704 (17 views); M902707 (14 views); |
| Matrix views | 31 | Matrix landing page (29 views); Aviernov et al 2015 (2 views); |
| Taxon list | 301 | |
| Views for media list | 42 | |
| Bibliography | 22 | |
| Specimen list | 125 |