Paper · 2026 · Life

Taxonomic and Phylogenetic Resolution of Novel Endophytic Arthrinium-like Fungi with an Updated Checklist of Nigrospora Species

Jutamart Monkai; Rungtiwa Phookamsak; Darbhe Jayarama Bhat; et al.

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citations
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Open access · cc-by

Abstract

Arthrinium-like fungi in the family Apiosporaceae are taxonomically complex and still require a thorough characterization despite recent phylogenetic reassessments. This study aimed to investigate the diversity and taxonomic position of endophytic Arthrinium-like fungi associated with Itea japonica and I. riparia in Thailand. Two fungal strains discovered from healthy stems of these hosts were characterized by integrative approaches including morphology, multi-locus phylogenetic analyses based on ITS, LSU, TEF1-α, TUB2 sequence data, and nucleotide base–pair comparisons. One isolate from I. japonica is introduced as Nigrospora iteae sp. nov. supported by distinct morphological traits, a well-resolved phylogenetic placement, and significant nucleotide difference from its closest relatives. The second isolate was identified as Apiospora vietnamensis and is reported herein as a new host record for I. riparia based on morphological congruence, a close phylogenetic relationship, and TUB2 nucleotide similarity with the type strain. In addition, a new species, Apiospora fici, originally described from dead leaves of Ficus septica in Taiwan, is reclassified based on updated phylogenetic analyses to clarify its taxonomic placement within Apiosporaceae. Furthermore, Nigrospora wurfbainiae nom. nov. is proposed as a replacement name for the later homonym N. guangdongensis. A summary of important morphological characteristics, host relationships, current distribution, and biological activities of Nigrospora species is provided. This study emphasizes the previously unrecognized fungal diversity within Itea hosts and offers new insights into species diversity and phylogenetic relationships within the Apiosporaceae.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 4

Observationobservedoriginal resultbasis n/a

Claim · model-written summary

Nigrospora iteae sp. nov. was described from an isolate of Itea japonica.

Taxon
Itea japonicaItea japonicae0
Outcome
Nigrospora iteae sp. nov.e1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Itea japonica
Itea japonica · TaxonRudolphous · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“associated with Itea japonica and I. riparia in Thailand”

✓ located verbatim in the source · abstract, characters 270–326 · show in text ↑
e1

“One isolate from I. japonica is introduced as Nigrospora iteae sp. nov.”

✓ located verbatim in the source · abstract, characters 578–649 · show in text ↑
Observationobservedoriginal resultbasis n/a

Claim · model-written summary

Apiospora vietnamensis is a new host record for Itea riparia.

Taxon
I. ripariaHyloniscus ripariuse2
Interactor
Apiospora vietnamensisApiospora vietnamensise2symbiont
Outcome
new host recorde2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Hyloniscus riparius
Hyloniscus riparius · TaxonDe Smedt P, Boerave P, Arijs G, Segers S (2018) Woodlice of Belgium: an annotated checklist and bibliography (Isopoda, Oniscidea). In: Hornung E, Taiti S, Szlav · CC BY 4.0 · Wikimedia Commons ↗

Verbatim

e2

“The second isolate was identified as Apiospora vietnamensis and is reported herein as a new host record for I. riparia”

✓ located verbatim in the source · abstract, characters 800–918 · show in text ↑
Observationobservedoriginal resultbasis n/a

Claim · model-written summary

Apiospora fici is reclassified within Apiosporaceae based on updated phylogenetic analyses.

Taxon
Ficus septicaFicus septicae3
Outcome
taxonomic placemente3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Ficus septica
Ficus septica · TaxonShih-Shiuan Kao · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e3

“a new species, Apiospora fici, originally described from dead leaves of Ficus septica in Taiwan, is reclassified based on updated phylogenetic analyses to clarify its taxonomic placement within Apiosporaceae”

✓ located verbatim in the source · abstract, characters 1055–1262 · show in text ↑
Observationobservedoriginal resultbasis n/a

Claim · model-written summary

Nigrospora wurfbainiae is proposed as a replacement name for the later homonym N. guangdongensis.

Taxon
Itea japonicaItea japonicae0
Outcome
replacement namee4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Itea japonica
Itea japonica · TaxonRudolphous · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“associated with Itea japonica and I. riparia in Thailand”

✓ located verbatim in the source · abstract, characters 270–326 · show in text ↑
e4

“Nigrospora wurfbainiae nom. nov. is proposed as a replacement name for the later homonym N. guangdongensis”

✓ located verbatim in the source · abstract, characters 1277–1383 · show in text ↑