Angustopila psammion

{{Short description|Species of snail}}

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| genus = Angustopila

| species = psammion

| authority = Páll-Gergely, Vermeulen & Anker. 2022

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Angustopila psammion is a species of land snail belonging to the subfamily Hypselostomatinae of the family Gastrocoptidae. It was described in 2022.MolluscaBase eds. (2022). MolluscaBase. Angustopila psammion. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1556455 on 2022-02-05

This species was discovered by scientists scrutinising a small pothole-like cave located in northern Vietnam, according to the original description published in Contributions to Zoology.{{Cite journal|last1=Páll-Gergely|first1=Barna|last2=Jochum|first2=Adrienne|last3=Vermeulen|first3=Jaap J.|last4=Anker|first4=Katja|last5=Hunyadi|first5=András|last6=Örstan|first6=Aydin|last7=Szabó|first7=Ábel|last8=Dányi|first8=László|last9=Schilthuizen|first9=Menno|date=2022-01-05|title=The world's tiniest land snails from Laos and Vietnam (Gastropoda, Pulmonata, Hypselostomatidae)|url=https://brill.com/view/journals/ctoz/91/1/article-p62_62.xml|journal=Contributions to Zoology|volume=91|issue=1|pages=62–78|doi=10.1163/18759866-bja10025|issn=1875-9866|doi-access=free}} According to National Geographic, this is the smallest species of land snail ever found. This species' shell measures 0.6 millimeters in diameter.{{Cite web|title=New snail species are world's smallest, tinier than grains of sand|url=https://www.msn.com/en-xl/news/other/new-snail-species-are-world-s-smallest-tinier-than-grains-of-sand/ar-AATplr6|access-date=2022-02-04|website=MSN|language=en-XL}}{{Cite web|title= Smallest snails on earth discovered? |url=https://www.nationalgeographic.com/animals/article/smallest-snails-on-earth-discovered?linkId=150748492|archive-url=https://web.archive.org/web/20220830205208/https://www.nationalgeographic.com/animals/article/smallest-snails-on-earth-discovered?linkId=150748492|url-status=dead|archive-date=August 30, 2022|website=National Geographic| date=2 February 2022 |access-date=5 February 2022}} In comparison to other land snails in its family, the Angustopila psammion has a smaller parietal tooth and a shorter spire, however it has a much wider umbilicus.{{Cite journal |last1=Páll-Gergely |first1=Barna |last2=Hunyadi |first2=András |last3=Vermeulen |first3=Jaap J. |last4=Grego |first4=Jozef |last5=Sutcharit |first5=Chirasak |last6=Reischütz |first6=Alexander |last7=Dumrongrojwattana |first7=Pongrat |last8=Botta-Dukát |first8=Zoltán |last9=Örstan |first9=Aydin |last10=Fekete |first10=Judit |last11=Jochum |first11=Adrienne |date=2023-02-13 |title=Five times over: 42 new Angustopila species highlight Southeast Asia's rich biodiversity (Gastropoda, Stylommatophora, Hypselostomatidae) |url=https://zookeys.pensoft.net/article/93824/ |journal=ZooKeys |language=en |issue=1147 |pages=1–177 |doi=10.3897/zookeys.1147.93824 |doi-access=free |bibcode=2023ZooK.1147....1P |issn=1313-2970|pmc=10297824 }}