Traits taxon details
original description
(of Opeas lata Ping, 1929 †) Ping, C. (1929). Fossil Terrestrial Gastropods from North China. <em>Palaeontologia Sinica, Series B.</em> 6(5): 1-30. page(s): 23, pl. 2, fig. 14a-d, textfig. 14a-d [details] Available for editors 
original description
(of ) Heude, P. M. (1882-1890). Notes sur les mollusques terrestres de la vallée du Fleuve Bleu. <em>Mémoires concernant l'histoire naturelle de l'Empire chinois.</em> 1 (2): 2 + 1-87, pls. 12-21 [1882]; 1 (3): 89-132, pls. 22-32 [1885]; 1 (4): 125-188, pls. 33-43 [1890]., available online at https://www.biodiversitylibrary.org/page/34061405 page(s): 151, plate 35, fig. 1.7 [details]
basis of record
Yen, T.-C. (1939). Die chinesischen Land- und Süßwasser-Gastropoden des Natur-Museums Senckenberg. <em>Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft.</em> 444: 1-233, pls 1-16. page(s): 74, plate 6, fig. 28 [details] Available for editors 
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