A new species of Tanabeceras (Ammonoidea, Tetragonitidae) from the middle Cenomanian (Upper Cretaceous) of Hokkaido, Japan

被引：0
|
作者：
Shigeta, Yasunari [1 ]
Sakai, Toshihiro [2 ]
Fujita, Hidetoshi [3 ]
机构：
[1] Natl Museum Nat & Sci, Dept Geol & Paleontol, 4-1-1 Amakubo, Tsukuba, Ibaraki 3050005, Japan
[2] Toko 15-4-2-3, Asahikawa, Hokkaido 0788355, Japan
[3] Higashi 3-11-2-25, Asahikawa, Hokkaido 0700023, Japan
来源：
PALEONTOLOGICAL RESEARCH | 2024年 / 28卷 / 03期
关键词：
ammonoid; Cenomanian; Cretaceous; Hokkaido; Tanabeceras;
D O I：
10.2517/PR230015
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
Tanabeceras nakagawaense sp. nov. is described from the lower part of the middle Cenomanian (Cunningtoniceras takahashii Zone, Upper Cretaceous) in the Nakagawa area, Hokkaido, northern Japan. This new taxon is characterized by having the most compressed shell among all species assigned to Tanabeceras, and it also represents the youngest taxon of the genus. The stratigraphic distribution of Tanabeceras in Hokkaido suggests that the genus migrated from the Tethyan realm to the Northwest Pacific region during late Albian, evolved and radiated regionally during the late Albian to early middle Cenomanian, and then became extinct during late middle Cenomanian time. ZooBank registration: urn:lsid:zoobank.org:pub:8034320A-CA86-42BA-8C45-446BB488A066
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页码：279 / 290
页数：12
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