Fusarium kotabaruense N. Maryani, Sand. -Den., L. Lombard, Kema & Crous, sp. nov

. — MycoBank MB828964;

Fig. 10

Etymology. Name refers to Kota Baru one of the nine regencies in the

Indonesian province of South Kalimantan.

Typus. INDONESIA, Desa Sungai Birah, Kecamatan Pamukan Barat, Kota Baru, Kalimantan Selatan (E 115°59'982" S 2°22'883"), on infected pseudostem of Musa var. Pisang Hawa (ABB), 19 June 2014, N. Maryani (holotype specimen and culture, InaCC F 963, preserved in metabolically inactive state) .

Sporulation abundant from conidiophores carried on aerial mycelium. Conidiophores on aerial mycelium abundant on PDA and SNA, less frequent on CLA, septate, irregularly branching; conidiogenous cells mono- or polyphialidic, subulate to subcylindrical, smooth- and thin-walled, (15–)19–33(–40) × 4–7 µm (av. 26 × 5 µm), forming terminally, singly or in verticillately branched conidiophores, less commonly laterally or intercalary, proliferating percurrently, periclinal thickening inconspicuous or absent; falcate and multiseptate, apical cells papillate, basal cells indistinct or foot-shaped, (2–)3–5(–7)-septate, formed on both mono- and polyphialides: 2-septate conidia, (21–)21.5– 25(–26) × 5–6 µm; 3-septate conidia, (24.5–)28–35(–36.5) × 5.5–6.5(–7) µm; 4-septate conidia, (32–)34–39.5(–41.5) × 5.5–6.5(–7) µm; 5-septate conidia, (34.5–)36–42.5(–45) × (5–)5.5–6.5(–7.5) µm; 6-septate conidia, 39–40.5 × 5.5–7 µm; 7-septate conidia, (38.5–)39.5–44(–45) × 6–7 µm; av. (21–)31.5–41.5(–45) × (5–)5.5–6.5(–7.5) µm. Sporodochia and chlamydospores not observed.

Culture characteristics — Colony on PDA showing optimal growth at 25 °C with an average growth rate of 5.0– 6.85 mm /d. Colony reverse rosy buff. Colony surface cottony rosy buff. Aerial mycelium abundant, cottony, with high sporulation and lacking exudates.

Geography & Host — Kota Baru, South Kalimantan, Musa sp. var. Pisang Hawa (ABB).

Pathogenicity — Non-pathogenic on Cavendish (AAA).

Notes — Fusarium kotabaruense represents a species in the Equiseti clade of the FIESC and relatively fast growing (5.0– 6.85 mm /d). Most distinguishing characteristic of this spe- cies is the absence of sporodochia on CLA culture. However, aerial conidiophores are abundant with conidia produced with high variability in its septation, (0–)3–5(–7)-septate.