Ophiocordyceps bidoupensis H. Yu, W.Q. Zou & D.X. Tang, 2022

Zou, Weiqiu, Tang, Dexiang, Xu, Zhihong, Huang, Ou, Wang, Yuanbing, Tran, Ngoc-Lan & Yu, Hong, 2022, Multigene phylogeny and morphology reveal Ophiocordyceps hydrangea sp. nov. and Ophiocordyceps bidoupensis sp. nov. (Ophiocordycipitaceae), MycoKeys 92, pp. 109-130 : 109

publication ID

https://dx.doi.org/10.3897/mycokeys.92.86160

persistent identifier

https://treatment.plazi.org/id/7F6718B3-1C1D-52CA-B72D-531CBD6AEA2A

treatment provided by

MycoKeys by Pensoft

scientific name

Ophiocordyceps bidoupensis H. Yu, W.Q. Zou & D.X. Tang
status

sp. nov.

Ophiocordyceps bidoupensis H. Yu, W.Q. Zou & D.X. Tang sp. nov.

Fig. 3 View Figure 3

Etymology.

Bidoupensis, referred to the type species collected from Bidoup Nuiba National Park.

Holotype.

Vietnam, Lintong Province, Bidoup Nuiba National Park, 12°8'9.30"N, 108°31'51.38"E, alt. 1678 m, on larva of Elateridae ( Coleoptera ) buried in soil, emerging from the leaf litter on the forest floor, 16 October 2017, H. Yu (YHH 20036, holotype; YFCC 8793, ex-holotype culture).

Sexual morph.

The stroma grew from the head of the host, solitary, solid, cylindrical, 11.8-22.5 cm long, yellow. Stipe clavate, yellow, curved, 10.7-21.2 cm long, 0.7-0.9 mm wide. Fertile parts cylindrical, yellow, slightly curved, 2.9-11.3 mm long, 0.9-1.6 mm wide. Sterile apices cone, yellow, 2.1-7.2 mm long, 0.2-0.7 mm wide. Perithecia immersed, pyriform to lanceolate, brown-yellow, 213.4-405.9 × 74.8-192.4 μm. Asci hyaline, slender, 116.1-192.7 × 4.8-7.5 μm. Asci cap prominent, capitate, 4.7-6.1 × 3.3-5.4 μm. Ascospores hyaline, filiform, multi-septate.

Asexual morph.

The colony grew slowly on PDA medium. Cultured at 25 °C for about 6 weeks, the diameter of the colony was 38-45 mm, white, aerial mycelium on the surface, slightly convex. The back of the colony was grayish-white, dark brown in the middle. Surface smooth of hyphae, hyaline, septate. Conidiogenous cells cone, hyaline, septate, smooth-walled, forming on hyphae, with a hypertrophic base, tapering abruptly to a thin neck, 13.80-46.4 × 0.42-5.13 μm. Conidia hyaline, oval or briolette, smooth-walled, 2.24-3.61 × 1.49-2.70 μm.

Host.

Larva of Elateridae ( Coleoptera ).

Habitat.

The hosts were buried in soil, and the stroma were found in the leaf litter on the forest floor.

Distribution.

Vietnam.

Notes.

Phylogenetic analyses showed that O. bidoupensis was clustered with O. houaynhangensis , O. brunneipunctata , O. langbianensis , O. cossidarum , and O. furcatosubulata of the O. sobolifera clade (Fig. 1 View Figure 1 ). Their hosts were larvae of Elateridae compared to cicada nymph hosts of the other species of the O. sobolifera clade (Table 2 View Table 2 ). Ophiocordyceos bidoupensis was well-supported by bootstrap support and posterior probabilities, and formed a separate subclade with O. houaynhangensis , O. brunneipunctata , O. langbianensis , and O. cossidarum . The morphology of O. bidoupensis was clearly different in shape and size from other species of O. sobolifera clade (Table 2 View Table 2 ). The stroma of O. bidoupensis grew solitary from the head of the host; sterile apices of the stroma were different from the other species.