Lech, R. R. ., and V. . Raverta. “The Genus Histosyrinx Massa, Termier Y Termier, 1974 (Septosyringothyridinae, Brachiopoda) from the Late Carboniferous of Argentina”. Revista De La Asociación Geológica Argentina, vol. 60, no. 2, Apr. 2005, pp. 377-82, https://revista.geologica.org.ar/raga/article/view/1055.