古銅炭角菌共有兩份等價模式標本（syntypes），皆保存於法國巴黎博物館中的Montagne 標本館﹔我們也在該博 物館的Leprieur 標本館，找到兩份對應於等價模式標本的複份等價模式標本（isosyntypes）。雖然這些標本皆未 成熟，由它們的子座形態，不難看出兩種不同的炭角菌涉及其中。一種可能為細黃炭角菌（X en缸rogena） ，另 一種的標本則被選定為古銅炭角菌的後還模式標本(lectotype）。為了穩定古銅炭角菌學名的使用，一份保存於 英國倫敦皇家植物園的成熟標本被指定為詮釋模式標本（epitype）。

The two syntypes of X. aenea from the Montagne herbarium and their corresponding isosyntypes from the Leprieur herbarium were located and studied. All of these specimens are immature, but their stromatal morphology indicates that two different species are involved. One is possibly X. enterogena, and the other apparently has characters coinciding with the original description of X. aenea. A lectotype is herein designated. A mature Kew specimen is designated as the epitype to stabilize the application of X. aenea.