On quartics with the maximal number of maximal tangency lines

In this note, we examine the arrangements of lines and configurations of points in $$\mathbb {P}^2(\mathbb {C})$$ that emerge from Fermat (or von Dyck) and Komiya–Kuribayashi quartics. These quartics are characterized by having the maximum number of lines of maximal tangency, that is, lines for which the intersection multiplicity at the tangency point is equal to the degree of the curve. Additionally, we delve into the study of sextactic points on these quartics — points at which there exists a conic with the curve having a local intersection multiplicity of at least 6, which is one more than that observed at a general point — alongside the related configurations of conics.