Myxasterina F.von Höhnel, 1909 Opeasterina Spegazzini, 1919 Asterina is a large genus of fungi in the Asterinaceae family.

It is currently the largest genus in Asterinaceae family, but only nine species have DNA sequence data available in GenBank due to its unculturable character.

Species in the genus generally have circular thyriothecia (an inverted ascocarp) with stellate dehiscence (division), lateral appressoria (infecting cell), globose asci (sexual spore), and dark brown, 1-septate (wall) ascospores.

[1] Including China,[6][7] New Zealand,[8] Kenya,[9] India,[10] and Panama (South America).

Found on plant genera resembling the genera of Actinodaphne (Lauraceae), Anthocephalus (Rubiaceae), Combretum (Combretaceae), Lindera (Lauraceae) and Unona (Annonaceae).