--------Beneath you can see the holotype of Dictyonema altayense Sennikov, 1976. This specimen originated from the Lower Silurian (middle Llandovery, convolutus-cometa Zone) of Gorny Altai. ---
Source : ------------Sennikov, N.V. 1976. Graptolites and Lower Silurian Stratigraphy of the Gorny Altai. - Publishing House Nauka, 1-274. [in Russian]