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A & C Holotype of Eostrobilops nipponicus nipponicus; B & D Holotype of E. coreanus coreanus. E inner shell structure of E. wuranicus (SDNU.GAS.0221.01.04). Arrows point to basal folds. Bar = 1mm.

A & C Holotype of Eostrobilops nipponicus nipponicus; B & D Holotype of E. coreanus coreanus. E inner shell structure of E. wuranicus (SDNU.GAS.0221.01.04). Arrows point to basal folds. Bar = 1mm.

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Eostrobilops wuranicus [无染始球果螺] Zhang, n. sp. is reported as a new species herein, with information on the species’ ecology. This new species can be separated from other Eostrobilops species distributed in China, Korea, Japan and other adjacent regions by the ribless shell, the four basal folds and the two lamellae. Inner shell structures, i. e., t...

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Context 1
... longer than the first and the second, extending ca. 35°; the fourth longest and strongest, extending ca. 40° (Fig. 2E, Fig. 4A). Lamellae two, both towards the aperture, extending for about 1 whorl; parietal lamellae stronger than infraparietal lamellae (Fig. 2E, Fig. 4B). Columellar lamella ...
Context 2
... longer than the first and the second, extending ca. 35°; the fourth longest and strongest, extending ca. 40° (Fig. 2E, Fig. 4A). Lamellae two, both towards the aperture, extending for about 1 whorl; parietal lamellae stronger than infraparietal lamellae (Fig. 2E, Fig. 4B). Columellar lamella ...
Context 3
... to E. coreanus coreanus (Pilsbry, 1927) (Holotype, ANSP 99967) (Fig. 2B, D) and E. nipponicus nipponicus (Pislbry, 1927) (Holotype, ANSP 99966) ( Fig. 2A, C), E. wuranicus lacks the columellar lamella which is present in the former two species. And the fourth fold of E. wuranicus is the longest and strongest, instead of the second fold in E. coreanus coreanus and E. nipponicus nipponicus. E. kongoensis (Kuroda ...
Context 4
... to E. coreanus coreanus (Pilsbry, 1927) (Holotype, ANSP 99967) (Fig. 2B, D) and E. nipponicus nipponicus (Pislbry, 1927) (Holotype, ANSP 99966) ( Fig. 2A, C), E. wuranicus lacks the columellar lamella which is present in the former two species. And the fourth fold of E. wuranicus is the longest and strongest, instead of the second fold in E. coreanus coreanus and E. nipponicus nipponicus. E. kongoensis (Kuroda & Miyanaga, 1939) shares the same quantities of folds and lamellae with E. ...