Traits taxon details
original description
(of ) Pfeiffer, L. (1857). Descriptions of thirty-three new species of land-shells, from the collection of H. Cuming, Esq. <em>Proceedings of the zoological Society of London.</em> 24 (325) [“1856”]: 385–392, pl. 36. London [8 May]., available online at https://www.biodiversitylibrary.org/page/12860951 page(s): 387 [details] 
basis of record
Sutcharit, C.; Tongkerd, P.; Shau-Hwai A.T.; Panha, S. (2012). Taxonomic revision of <i>Dyakia janus</i> from peninsular Malaysia (Pulmonata: Dyakiidae), with notes on other sinistrally coiled helicarionids. <em>Raffles Bulletin of Zoology.</em> 60(2): 279–287. [details] Available for editors 
additional source
Maassen, W. J. M. (2001). A preliminary checklist of the non-marine molluscs of West-Malaysia: "a Hand List". <em>De Kreukel, Extra Editie 2001.</em> 1–155. page(s): 106 [details] Available for editors 
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