Ampullina ortoni Gabb, 1870

DeVries, Thomas J., 2019, Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru), Journal of Natural History 53 (25), pp. 1533-1584 : 1554

publication ID

https://doi.org/ 10.1080/00222933.2018.1524032

DOI

https://doi.org/10.5281/zenodo.3671240

persistent identifier

https://treatment.plazi.org/id/03BB2338-E35E-E22D-FE41-A3685B9CF973

treatment provided by

Valdenar

scientific name

Ampullina ortoni Gabb, 1870
status

 

Ampullina ortoni Gabb, 1870

( Figure 4 View Figure 4 (g))

Ampullina ortoni Gabb 1870 , 5: 27.

Euspira ortoni Gabb 1877 , 264, pl. 35, fig. 3.

Ampullina paytensis Woods 1922 , 77, pl. 7, figs. 3, 4.

Ampullina ortoni Gabb. Olsson 1928 , 107.

Remarks

The deep sutural groove on the ampullinid specimen from the Caballas Formation is a diagenetic artefact created by shell material dissolving from between gypsum-filled internal moulds of successive whorls. Thus, the Caballas specimen is not an example of the deeply grooved Ampullinopsis Conrad, 1865 , which is considered by MacNeil and Dockery (1984) to have an exclusively Oligocene record in Europe and the Americas. The specimen of Ampullina ortoni has a thin shell, appressed sutures, and no surface spiral sculpture, contrasting in the last named character with the spirally lined Ampullina gabbi Woods, 1922 , from the Salina Group of Gonzáles (1976).

Olsson (1944) described three new species of Ampullina from the late Campanian beds of the Tortuga Formation in the Sechura Basin of northern Peru: A. breccia Olsson, 1944 , A. tortuga Olsson, 1944 , and A. cumara Olsson, 1944 . The moderately high spire, non-sinuate columella, and elongate elliptical aperture of the Caballas Formation example of A. ortoni most resemble comparable features in A. breccia . Ampullina breccia , however, like the Eocene A. gabbi , has faint spiral threads, which the specimen of A. ortoni lacks, judging from an inspection of a well-preserved external mould from the Caballas Formation.

Material

UWBM 107627, mostly an internal mould, B8772, L (36.8), W (33.7).

Occurrence

Upper lower Eocene, Chacra Formation, and middle Eocene, Talara Formation, Talara Basin, northern Peru; Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru.

UWBM

University of Washington, Burke Museum

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Littorinimorpha

Family

Ampullinidae

Genus

Ampullina

Loc

Ampullina ortoni Gabb, 1870

DeVries, Thomas J. 2019
2019
Loc

Ampullina ortoni

Gabb. Olsson 1928
1928
Loc

Ampullina paytensis

Woods 1922
1922
Loc

Euspira ortoni

Gabb 1877
1877
Loc

Ampullina ortoni Gabb 1870

Gabbi 1870
1870
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