<p>A new species of entomophthoroid fungus, <i>Conidiobolus bimetaconidius</i> sp. nov., is described from plant debris collected in Xishuangbanna Autonomous Prefecture, Yunnan Province, China. This species is morphologically distinguished by its distinctive production of two secondary conidia arising directly from primary conidia, large primary conidia (34.0–58.0 × 24.0–45.0&#xa0;μm), relatively large microconidia (11.0–25.0 × 16.0–29.0&#xa0;μm), and smooth, globose zygospores (21.0–37.0&#xa0;μm in diameter). Phylogenetic analyses based on nuclear large subunit ribosomal DNA (nucLSU), mitochondrial small subunit ribosomal DNA (mtSSU), and elongation factor-like gene (<i>EFL</i>) sequences confirm the placement of <i>C. bimetaconidius</i> within the genus <i>Conidiobolus</i> sensu stricto, where it forms a well-supported clade sister to <i>C. bifurcatus</i>. Morphologically, <i>C. bimetaconidius</i> differs from phylogenetically related species by its larger primary conidia and microconidia compared to <i>C. bifurcatus</i>, and by its unique pattern of secondary conidium production compared to other species with similar conidial dimensions. This discovery brings the total number of known <i>Conidiobolus</i> s.s. species to 27 and represents the tenth species of this genus reported from China.</p>

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Conidiobolus bimetaconidius sp. nov. (Conidiobolaceae, Entomophthorales) from plant debris in Yunnan Province, China

  • Tong Zhang,
  • Yong Nie,
  • XiaoYong Liu,
  • Bo Huang

摘要

A new species of entomophthoroid fungus, Conidiobolus bimetaconidius sp. nov., is described from plant debris collected in Xishuangbanna Autonomous Prefecture, Yunnan Province, China. This species is morphologically distinguished by its distinctive production of two secondary conidia arising directly from primary conidia, large primary conidia (34.0–58.0 × 24.0–45.0 μm), relatively large microconidia (11.0–25.0 × 16.0–29.0 μm), and smooth, globose zygospores (21.0–37.0 μm in diameter). Phylogenetic analyses based on nuclear large subunit ribosomal DNA (nucLSU), mitochondrial small subunit ribosomal DNA (mtSSU), and elongation factor-like gene (EFL) sequences confirm the placement of C. bimetaconidius within the genus Conidiobolus sensu stricto, where it forms a well-supported clade sister to C. bifurcatus. Morphologically, C. bimetaconidius differs from phylogenetically related species by its larger primary conidia and microconidia compared to C. bifurcatus, and by its unique pattern of secondary conidium production compared to other species with similar conidial dimensions. This discovery brings the total number of known Conidiobolus s.s. species to 27 and represents the tenth species of this genus reported from China.