MolluscaBase - Polygyra appressa (Say, 1821)

MolluscaBase name details

Polygyra appressa (Say, 1821)

AphiaID

1366381 (urn:lsid:marinespecies.org:taxname:1366381)

Classification

Status

unaccepted (unaccepted combination)

Accepted name

Patera appressa (Say, 1821)

Rank

Species

Parent

Polygyra Say, 1818

Original name

Helix appressa Say, 1821

Direct children (6)

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Subspecies Polygyra appressa perigrapta Pilsbry, 1894 accepted as Patera perigrapta (Pilsbry, 1894)
Subspecies Polygyra appressa tryoniana Pilsbry, 1904 accepted as Patera perigrapta (Pilsbry, 1894) (junior synonym)
Variety Polygyra appressa var. extrema MacMillan, 1940 accepted as Patera appressa (Say, 1821) (unaccepted > junior subjective synonym)
Variety Polygyra appressa var. fosteri F. C. Baker, 1932 accepted as Xolotrema fosteri (F. C. Baker, 1932) (original combination)
Variety Polygyra appressa var. perigrapta Pilsbry, 1894 accepted as Patera perigrapta (Pilsbry, 1894) (unaccepted rank)
Variety Polygyra appressa var. sculptior Chadwick, 1899 accepted as Patera appressa (Say, 1821) (unaccepted > junior subjective synonym)

Environment

~~marine~~, ~~brackish~~, ~~fresh~~, terrestrial

Original description

(of Helix appressa Say, 1821) Say, T. (1821). Description of univalve shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia. 2(1): 149-179., available online at https://www.biodiversitylibrary.org/page/36831337
page(s): 151 [details]

Taxonomic citation

MolluscaBase eds. (2021). MolluscaBase. Polygyra appressa (Say, 1821). Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1366381 on 2025-09-11

Taxonomic edit history

Date

action

2019-08-12 09:35:35Z

created

Bieler, Rüdiger

2021-09-13 15:13:54Z

changed

Auffenberg, Kurt

Licensing

The webpage text is licensed under a Creative Commons Attribution 4.0 License

[taxonomic tree]

Sources (3)

original description (of Helix appressa Say, 1821) Say, T. (1821). Description of univalve shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia. 2(1): 149-179., available online at https://www.biodiversitylibrary.org/page/36831337
page(s): 151 [details]

basis of record InvertEBase. (2018). Authority files of U.S. and Canadian land and freshwater mollusks developed for the InvertEBase (InvertEBase.org) project. [details]

additional source Chadwick, G. H. (1899). Notes on Polygyra appressa. The Nautilus. 13(5): 54-55., available online at https://www.biodiversitylibrary.org/page/42799954 [details]