Genus
Carbacanthographis bears a strong resemblance to the genera
Allographa and
Graphis, with which it shares several characteristics, such as
Trentepohlia-like , a typically (blackened) excipulum, and colourless, transversely
septate or ascospores. One of the main distinguishing features of
Carbacanthographis is its unique apical structure of the . Unlike in
Allographa and
Graphis, where the excipulum's two lips close and the extends into the fissure, in
Carbacanthographis, the excipulum extends above the hamathecium, leaving an open fissure. This fissure's walls are covered at the tips by warty , which are challenging to observe and rarely seen. Additionally, the excipulum may have somewhat radiating and apically emergent, smooth
hyphae. The growth pattern of the carbonised excipulum in
Carbacanthographis results in less evident striate lirellae compared to many species of
Graphis and
Allographa. Clearly striate lirellae in
Carbacanthographis are typically visible only when the excipulum is abraded, as seen in species like
C. latispora. The in
Carbacanthographis also show notable differences. While in
Allographa and
Graphis, the spore become rounded to with a strong I+ blue-violet reaction due to deposition, in
Carbacanthographis, some species have rounded to lentiform lumina without a positive I-reaction. In other species, there is little or no endospore formation, and the septa remain thin, with ascospores that may or may not exhibit a positive I-reaction. The hamathecium's inspersion in
Carbacanthographis consists of minute droplets approximately 0.5–1
μm wide, in contrast to the larger, unevenly sized oil-like droplets found in
Graphis and
Allographa. This difference in inspersion further aids in distinguishing
Carbacanthographis from its close relatives. ==Species==