Ammonia maruhasii (Kuwano)

Hanagata, S & Nobuhara, T, 2015, Illustrated guide to Pliocene foraminifera from Miyakojima, Ryukyu Island Arc, with comments on biostratigraph, Palaeontologia Electronica (Cambridge, England) 33 (8), pp. 1-142 : 118-119

publication ID

https://doi.org/ 10.26879/444

persistent identifier

https://treatment.plazi.org/id/A029445F-E956-FFFC-48EB-BB5E7447A76B

treatment provided by

Felipe

scientific name

Ammonia maruhasii (Kuwano)
status

 

Ammonia maruhasii (Kuwano) View in CoL

Figure 35.3-35.6 View FIGURE 35

1950 Rotalia maruhasii Kuwano , pp. 314, 315, text-figs. 2, 8.

1968 Ammonia ketienziensis angulata (Kuwano) View in CoL — Huang, p. 55, pl. 12, figs. 8a, b (non Streblus ketienziensis Ishizaki, 1948 View in CoL ).

1988 Ammonia maruhasii (Kuwano) View in CoL — Wang, Zhang, Zhao, Min, Bian, Zheng, Cheng, and Chen, pp. 166, 167, pl. 26, figs. 14, 15, pl. 27, fig. 11.

Remarks. High trochospiral variation is included in this species. This species is distinguished from Rotalia ketienziensis Ishizaki in the lesser number of chambers, radial sutures, and less developed umbilical ornament. It also distinguished from Rotalia ketienziensis angulata Kuwano in having a more rounded periphery and radial sutures. It might be a Pliocene ancestral form of these modern Ammonia species.

Occurrence. Abundant in the Oura and Onogoshi formations, common in the Yonahama and Minebari formations.

Kingdom

Chromista

Phylum

Foraminifera

Class

Globothalamea

Order

Rotaliida

Family

Ammoniidae

Genus

Ammonia

Loc

Ammonia maruhasii (Kuwano)

Hanagata, S & Nobuhara, T 2015
2015
Loc

Streblus ketienziensis

Ishizaki 1948
1948
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