original description
(of Trigonioides tachtamyschensis Martinson, 1961 †) Martinson, G. G. (1961). Mezozoiskie i Kaynozoyskie Molluski Kontinentalnykh Otlozheniy Sibirskoy Platformy, Zabaykalya i Mongolii [Mesozoic and Cenozoic Mollusca of the continental deposits of the Sibirican platform, Transbaikalia and Mongolia]. <em>Trudy Baikal'skoi Limnologicheskoi Stantsii [Transactions of Baikalian Limnologic Station].</em> 19:1–332 p., 26 pl. In Russian.
page(s): pl. 17, fig. 1; note: no description [details] Available for editors [request]
redescription
Martinson, G.G. (1965). Biostratigrafiya i fauna kontinental'nogo mela Fergany [Biostratigraphy and fauna of the continental Cretaceous of Fergana]. In: Melovyye kontinental'nyye otlozheniya Fergany. Nauka, Moskva, p. 101-139., available online at https://www.geokniga.org/books/6382
page(s): 116-117, pl. 3, figs 3-5 [details]
From editor or global species database
Taxonomic remark Not indicated as new species in Martinson (1961, as Trigonioides), but validly introduced by providing an illustration. Described as new in Martinson (1965, as Pseudohyria) without referring to his 1961-record. [details]