First evidence of Trichomerium-like (Trichomeriaceae) fossil fungi from India and its implications.

IF 2.2 2区生物学 Q2 MYCOLOGY

Mycologia Pub Date : 2025-11-01 Epub Date: 2025-10-15 DOI:10.1080/00275514.2025.2554507

Sampa Kundu, Mahasin Ali Khan

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引用次数: 0

Abstract

Trichomeriaceae, the most common sooty mold family under Chaetothyriales, are most common in tropical to subtropical regions worldwide. However, no trichomeriaceous fossil fungi have been reported until now. Here, we report for the first time trichomeriaceous fossil fungi on cuticle fragments of a compressed angiosperm (cf. Fagaceae) leaf recovered from the middle Siwalik (late Miocene; ca. 12-8 Ma) flora of Himachal Himalaya. They are characterized by superficial, septate, cylindrical hyphae; circular, setiferous ascostromata; a 3-septate ascospore; and a 3-armed stauroconidium. The above significant morphological attributes reveal a close resemblance of the Siwalik fungi with modern Trichomerium (Eurotiomycetes: Chaeothyriales: Trichomeriaceae). Here, we describe two new fossil species, namely, Trichomerium palaeoindicum Kundu & Khan, sp. nov. (sexual morph), and T. palaeostauroconidium Kundu & Khan, sp. nov. (asexual morph). Additionally, we discuss their paleoecological significance in terms of the present-day ecological conditions of modern analogues. These new findings play a great role in the evolutionary context and diversification of the Trichomeriaceae in time and space.

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印度类毛滴虫（毛滴虫科）真菌化石的首个证据及其意义。

毛霉科是毛霉亚纲下最常见的黑霉科，在全球热带至亚热带地区最为常见。然而，到目前为止，还没有报道过毛状真菌化石。本文首次报道了在喜马偕尔-喜马拉雅地区Siwalik中部（晚中新世；约12-8 Ma）植物区系中发现的压缩被子植物（如壳斗科）叶片角皮碎片上的毛状真菌化石。它们的特征是表面的、分开的、圆柱形的菌丝；圆形，结实的子囊层；3裂的子囊孢子；还有一个3臂的静分生孢子。上述重要的形态特征显示了Siwalik真菌与现代毛滴虫（Eurotiomycetes: Chaeothyriales: Trichomeriaceae）的相似性。本文描述了两个新的化石种，分别是Trichomerium palaeoindicum Kundu & Khan， sp. 11 .（有性形态）和T. palaeostauroconidium Kundu & Khan, sp. 11 .（无性形态）。此外，我们还讨论了它们在现代类似物的生态条件下的古生态学意义。这些新发现对毛滴虫科植物的进化背景和时空多样性具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mycologia 生物-真菌学

CiteScore

6.20

自引率

3.60%

发文量

审稿时长

4-8 weeks

期刊介绍： International in coverage, Mycologia presents recent advances in mycology, emphasizing all aspects of the biology of Fungi and fungus-like organisms, including Lichens, Oomycetes and Slime Molds. The Journal emphasizes subjects including applied biology, biochemistry, cell biology, development, ecology, evolution, genetics, genomics, molecular biology, morphology, new techniques, animal or plant pathology, phylogenetics, physiology, aspects of secondary metabolism, systematics, and ultrastructure. In addition to research articles, reviews and short notes, Mycologia also includes invited papers based on presentations from the Annual Conference of the Mycological Society of America, such as Karling Lectures or Presidential Addresses.