Dimeromyces geminander Thaxter, Proceedings

Rossi, Walter & Leonardi, Marco, 2018, New species and new records of Laboulbeniales (Ascomycota) from Sierra Leone, Phytotaxa 358 (2), pp. 91-116 : 103-104

Dimeromyces geminander Thaxter, Proceedings of the American Academy of Arts and Sciences 55: 253, 1920.

Known distribution. Described on three species of Diacantha ( Coleoptera , Chrysomelidae , Galerucinae ) from Cameroon and never reported since ( Balazuc 1988).

New record from Sierra Leone. Western Area, Guma Valley, 30.X.1991, W. Rossi , on distal portion of the elytra of Phyllobotricella cf. citrina Weise.

Remarks. The male thalli from Sierra Leone have paired antheridia on the upper cell of the receptacle, which is said to be a distinctive characteristic of Dimeromyces geminander . However, it is not easy to distinguish this species from D. alaucophorae Thaxt. , a variable and widespread species parasitic on various genera of the Galerucinae reported from several tropical countries in Africa, Asia and Oceania ( Balazuc 1988); among the numerous hosts of the latter species, there is also Diacantha robusta Weise , which is one of the hosts of Dimeromyces geminander . Thaxter (1924, p. 365) expressed his doubts in separating the two species.