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PKP Metadata Items |
Metadata for this Document |
| 1. |
Title |
Title of document |
The Genus Alatyroceras gen. nov. (Ammonoidea: Cardioceratidae, Arctocephalitinae) from the Upper Bathonian (Middle Jurassic) of the Russian Platform |
| 2. |
Creator |
Author's name, affiliation, country |
V. V. Mitta; Borissiak Paleontological Institute, Russian Academy of Sciences; Cherepovets State University; Russian Federation |
| 3. |
Subject |
Discipline(s) |
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| 3. |
Subject |
Keyword(s) |
ammonites; Arctocephalitinae; Cadoceratinae; Middle Jurassic; Upper Bathonian; biostratigraphy; Central Russia |
| 4. |
Description |
Abstract |
A new genus Alatyroceras is established for the species A. nageli (Mitta) (type species of the genus), A. keuppi (Mitta), A. efimovi (Mitta), and A. infimum (Gulyaev et Kisselev), in Central Russia characterizing the interval correlated with the Upper Bathonian Variabile and Calyx zones of East Greenland. According to the refined data, the Keuppi Zone of the Russian Platform includes (from bottom to top) the efimovi, nageli, and keuppi faunal horizons. The genus Alatyroceras [M] completes the phylogenetic lineage Arcticoceras → Alatyroceras in the subfamily Arctocephalitinae; the name Costacadoceras Rawson is common to all microconchs of the subfamily. |
| 5. |
Publisher |
Organizing agency, location |
The Russian Academy of Sciences |
| 6. |
Contributor |
Sponsor(s) |
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| 7. |
Date |
(DD-MM-YYYY) |
04.11.2024
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| 8. |
Type |
Status & genre |
Peer-reviewed Article |
| 8. |
Type |
Type |
Research Article |
| 9. |
Format |
File format |
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| 10. |
Identifier |
Uniform Resource Identifier |
https://kazanmedjournal.ru/0031-031X/article/view/673300 |
| 10. |
Identifier |
Digital Object Identifier (DOI) |
10.31857/S0031031X24020045 |
| 10. |
Identifier |
eLIBRARY Document Number (EDN) |
FIIFES |
| 11. |
Source |
Title; vol., no. (year) |
Paleontologičeskij žurnal; No 2 (2024) |
| 12. |
Language |
English=en |
ru |
| 13. |
Relation |
Supp. Files |
Fig. 1. Scheme of the location of type localities of species of the genus Alatyroceras: a – overview (the numbers indicate: 1 – Alatyr I and Alatyr II sections in Mordovia, 2 – section near the village of Prosek in the Nizhny Novgorod region), b – detailed (I – Alatyr I section, II – Alatyr II section). (203KB)
Fig. 2. Part of the Alatyr I outcrop (photo by the author, 2022); intervals of faunal horizons are shown on the left: I – efimovi, II – nageli, III – keuppi. (498KB)
Fig. 3. Holotypes of species Alatyroceras gen. nov. (× 0.5): a, b – A. keuppi (Mitta); c, d – A. nageli (Mitta); d–h – A. efimovi (Mitta). The length of the scale bar is 10 mm; The asterisk (*) marks the beginning of the body chamber. (609KB)
Fig. 4. Late Bathonian macroconchs of the genus Cadoceras from the Alatyr River basin (× 0.5): a, b – C. calyx Spath; c, d – C. apertum Callomon et Birkelund. The scale bar is 10 mm long; the asterisk (*) marks the beginning of the body chamber. (249KB)
Fig. 5. Arcticoceras cranocephaloide Callomon et Birkelund: a – microconch [= Costacadoceras sp.], body chamber with an imprint of the phragmocone, the scale bar is 10 mm long; b – sample of macroconchs, photograph not to scale; East Greenland, Cranocephaloide Zone; Copenhagen Museum of Natural History, coll. J. Callomon and T. Birkelund; determinations by J. Callomon; photo by the author. (541KB)
Fig. 6. Pseudocadoceras ex gr. mundum (Sasonov) (microconchs Cadoceras falsum Voronetz) from the side and from the ventral side: a, b – specimen PIN, No. 5029/193; c, g – specimen PIN, No. 5029/191; d, f – specimen PIN, No. 5029/194; g, h – specimen PIN, No. 5029/190; i, j – specimen PIN, No. 5029/163; k, m – specimen PIN, No. 5029/192; Chuvashia, Poretsky district, quarry near the village of Poretskoye; lower Callovian, Elatmae Zone, falsum faunal horizon. Length of scale bar is 10 mm; The beginning of the living chamber is marked with an asterisk (*). (253KB)
Tabl. II (918KB)
Tabl. III (940KB)
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Coverage |
Geo-spatial location, chronological period, research sample (gender, age, etc.) |
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| 15. |
Rights |
Copyright and permissions |
Copyright (c) 2024 Russian Academy of Sciences
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