original description
(of Trigonioides (Trigonioides) quadratus Z.-W. Gu & Q.-H. Ma, 1976 †) Gu, Z.-W.; Huang, B.-Y.; Chen, C.-Z.; Wen, S.-X.; Ma, Q.-H.; Lan, X.; Xu, J.-T.; Liu, L.; Wang, S.-M.; Wang, D.-Y.; Qiu, R.-Z.; Huang, Z.-Q.; Zhang, Z.-M.; Chen, J.-H.; Wu, P.-L. (1976). The Lamellibranch Fossils of China. Science Press, Beijing, 522 pp.
page(s): 357, pl. 111, figs 1-6 [details] Available for editors [request]
basis of record
Chen, J.-H.; Komatsu, T.; Cao, M.-Z.; Stiller, F. (2006). <em>Kumamotoa</em>, an early Late Cretaceous non-marine bivalve, from Fujian, south China. <em>Journal of Asian Earth Sciences.</em> 27(6): 943-951., available online at https://doi.org/10.1016/j.jseaes.2005.10.002
page(s): 945-947, fig. 3 [details]
From editor or global species database
Synonymy Q.-H. Ma (1989) considered this species partly a synonym of Trigonioides matsumotoi (Kobayashi & Suzuki, 1940) and of Trigonioides rotunda Q.-H. Ma, 1976 [priority in the latter case not confirmed!]. [details]