Umbonium (Suchium) joganjiense (English spelling) Umboniumjoganjiense

…
[Evolution of the oxeye reptiles]
The Umbonium species evolved from Protorotella , which became extinct at the end of the Miocene, during the Miocene period of the Cenozoic era. The first to appear was Umbonium ( Suchium ) joganjiense , a member of the Suchium species group (subgenus). This species has spiral ribs on the shell surface, which is different from the smooth Protorotella .

*Some of the terminology that mentions "Umbonium (Suchium) joganjiense" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…
［キサゴ類の進化］
　キサゴ類(ウンボニウムUmbonium)は新生代中新世の中ごろ，中新世末滅亡したProtorotellaから分化した。まずその中のダンベイキサゴ種群(Suchium亜属)のUmbonium (Suchium) joganjienseが最初に現れた。殻表に螺肋（らろく）のある種で，平滑なProtorotellaと異なっている。…

※「Umbonium （Suchium） joganjiense」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報