Two new species of the diatom genus Praestephanos from the Pliocene Ueno Formation, Kobiwako Group, Mie Prefecture, Japan

被引：0
|
作者：
Kojima, Takahiro [1 ,2 ]
Saito-Kato, Megumi [3 ]
Ohtsuka, Taisuke [4 ]
Satoguchi, Yasufumi [4 ]
机构：
[1] Univ Tsukuba, Grad Sch Life & Environm Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058572, Japan
[2] Res Inst Environm Geol, 3-5-1 Inagekaigan, Mihama, Chiba 2610005, Japan
[3] Natl Museum Nat & Sci, Dept Geol & Paleontol, 4-1-1 Amakubo, Tsukuba, Ibaraki 3050005, Japan
[4] Lake Biwa Museum, 1091 Oroshimo Cho, Kusatsu, Shiga 5250001, Japan
来源：
PALEONTOLOGICAL RESEARCH | 2024年 / 28卷 / 03期
关键词：
Diatoms; Kobiwako Group; Paleo-lake Biwa; Pliocene; Praestephanos; Ueno Formation; STEPHANODISCUS; BACILLARIOPHYCEAE; NOV;
D O I：
10.2517/PR220034
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
Two new diatom species, Praestephanos tokaiensis sp. nov. and P. miensis sp. nov. are described from lacustrine deposits in the Pliocene Ueno Formation of the Kobiwako Group in Iga City, Mie Prefecture, Japan. The stratigraphic ranges of P. tokaiensis and P. miensis are approximately 3.9-3.8 Ma and 3.8-3.7 Ma, respectively. The morphology of these species is mainly characterized by a slightly doubly undulating central area; this feature is not found in previously described Praestephanos species or similar Stephanodiscus species. The stratigraphic distribution and morphology of the two new species suggest that P. tokaiensis and P. miensis have an ancestor-descendant relationship.
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页码：291 / 306
页数：16
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