Labivalidus jianchuanensis (C. L. Hou & M. Piepenbr.) Lan Zhuo & C. L. Hou, 2025

Zhuo, Lan, Wang, Hai-Qi, Zhang, Peng, Sui, Xiao-Nan, Guo, Mei-Jun, Wang, Shi-Juan & Hou, Cheng-Lin, 2025, New genera and species of coniferous twig-inhabiting Rhytismatales from China, IMA Fungus 16, pp. e 138790-e 138790 : e138790-

Labivalidus jianchuanensis (C. L. Hou & M. Piepenbr.) Lan Zhuo & C. L. Hou comb. nov.

Fig. 19

Lophodermium jianchuanense C. L. Hou & M. Piepenbr. , Can. J. Bot. 83 (1): 40. 2005. Basionym.

Type.

CHINA, Yunnan Province, Jianchuan, Laojunshan , alt. ca. 3400 m, on Juniperus formosana Hayata ( Cupressaceae ), 25 Jul. 2001, C. L. Hou, M. Piepenbring, Z. L. Yang, & R. Kirschner 104 ( HMAS, holotype) .

Specimens examined.

CHINA, Yunnan Province, Lijiang, Laojunshan , 26.6319°N, 99.7252°E, alt. ca. 3855 m, on needles and twigs of Juniperus squamata ( Cupressaceae ), 21 Jun. 2021, C. L. Hou, M. J. Guo, and H. Zhou, HOU 1781 B ( BJTC 2021092 ) ; 26.6314°N, 99.7247°E, alt. ca. 3850 m, on needles and twigs of J. squamata , 21 Jun. 2021, C. L. Hou, M. J. Guo, and H. Zhou, HOU 1815 A ( BJTC 2021126 ) ; 26.6425°N, 99.7678°E, alt. ca. 3500 m, on needles and twigs of J. squamata , 17 Aug. 2023, C. L. Hou, L. Zhuo, and S. Y. Zhao, HOU 2023 ( BJTC 2023153 ) ; 26.6425°N, 99.7678°E, alt. ca. 3500 m, on needles and twigs of J. squamata , 17 Aug. 2023, C. L. Hou, L. Zhuo, and S. Y. Zhao, HOU 2024 ( BJTC 2023154 ) .

Notes.

Hou et al. (2005) described Lophodermium jianchuanense on Juniperus formosana in the genus Lophodermium . In the phylogenetic tree, the molecular sequences of Lo. jianchuanense form a clade sister to La. cunninghamiae and distant from Lo. arundinaceum , the type species of Lophodermium . Based on this phylogenetic position and morphological similarity, we transfer Lo. jianchuanense to the genus Labivalidus , the epithet has been adjusted to agree with the gender of the new genus name.

Figures

Figure 19. Labivalidus jianchuanensis (HOU 1781 B / BJTC 2021092) a ascomata on needles of Juniperus squamata b, c mature ascomata on a twig or a needle of Juniperus squamata. Scale bars: 1 mm (a); 500 μm (b); 200 μm (c).