Ophiocordyceps ansiformis
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Ordo: Hypocreales
Familia: Ophiocordycipitaceae
Genus: Ophiocordyceps
Name
Ophiocordyceps ansiformis Hong Yu bis, D.X. Tang & J. Zhao sp. nov. – Wikispecies link – Pensoft Profile
Etymology
Ansi- = handle, formis = forms, the epithet refers to ascospores having a handle-shape.
Diagnosis
Ophiocordyceps ansiformis differs from closely-related species by producing lanceolate ascospores with a structure resembling a handle-shape in the middle, while O. contiispora produces fusiform ascospores that do not exhibit a similar structure in the middle.
Holotype
China, Yunnan Province, Jinghong City, Puwen Town. Infected Colobopsis sp. (Formicinae) biting into a leaf of Rubiaceae Juss., 22°31'24"N, 100°58'57"E, alt. 1,029 m, 02 October 2022, Hong Yu bis (YHH 2210036 – preserved in the Yunnan Herbal Herbarium).
Description
Sexual morph: External mycelia produced from all orifices and sutures, brown at maturity. Stroma single, produced from dorsal pronotum, never branched, 25–28 mm in length, cylindrical, dark brown at maturity, light brown at the apical part. Fertile region of lateral cushions, 1–3, hemispherical, 1–1.3 × 0.7–1 mm. Perithecia immersed to partially erumpent, flask-shaped, (174–) 189–290 × 99–126 (–128) μm, with short, exposed neck or ostiole. Asci 8-spored, hyaline, cylindrical, (88–) 92–108 (–112) × 7–10 (–11) μm. Ascus caps prominent, hemispherical, 4–6 (–7) × 2–3 (–4) μm. Ascospores hyaline, thin-walled, lanceolate, having a handle-shape in the middle, 45–59 × 5–6 (–7) μm, 6–9-septate, tapering at apex. Asexual morph: Hirsutella-A type present along stromata. Phialides lageniform, 15–24 × 3–4 μm, tapering to a short neck, 6–8 μm in length. Conidia were not observed.
Germination process: Ascospores released on agar germinated after 48 h to produce 1–2 capilliconidiophores, (54–) 60–79 (–84) × 0.8–1.4 μm, bearing a terminal capilliconidium, hyaline, smooth-walled, limoniform, 6–10 × 3–4 μm, slightly narrowing apically.
Host: Colobopsis sp. (Formicinae).
Habitat
Subtropical monsoon evergreen broad-leaved forest. Infected Colobopsis sp. biting into a leaf of Rubiaceae Juss., from 0.8 to 1 m above the ground.
Distribution
China, Yunnan Province, Jinghong City.
Material examined
China, Yunnan Province, Jinghong City, Puwen Town. Infected Colobopsis sp. biting into a leaf of Rubiaceae Juss., 22°31'24"N, 100°58'57"E, alt. 1,029 m, 02 October 2022, D.X. Tang (YHH 2210007).
Notes
Phylogenetic analyses showed that O. ansiformis formed a sister lineage with O. tortuosa and O. contiispora, was clustered in the O. unilateralis core clade, with statistical support from bootstrap proportions (BS = 85%) and Bayesian posterior probabilities (BPP = 95%) (Fig. 1). Ophiocordyceps ansiformis was similar to O. tortuosa and O. contiispora in the same host Colobopsis sp. (Fig. 2). However, it differed from O. tortuosa and O. contiispora in that it produced lanceolate ascospores and has a handle-shape in the middle (Table 3).
Original Description
- Tang, D; Zhao, J; Lu, Y; Wang, Z; Sun, T; Liu, Z; Yu, H; 2023: Morphology, phylogeny and host specificity of two new Ophiocordyceps species belonging to the “zombie-ant fungi” clade (Ophiocordycipitaceae, Hypocreales) MycoKeys, 99: 269-296. doi
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