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08-04-2025 11:22

Mathias Hass Mathias Hass

Hi, I have some trouble with this Lophodermium. I

16-04-2021 22:02

Bo Valeur Bo Valeur

Hi thereThis Nice Lachnum was found on a dead bran

06-04-2025 18:26

Yanick BOULANGER

Bonjour à tousSur bois durApothécie (02 – 05)

06-04-2025 17:28

Alessio Pierotti Alessio Pierotti

Tenuta di Tombolo (Parco regionale Migliarino San

07-04-2025 16:07

Nicolas Suberbielle

Bonjour à tous,Je sèche sur une récolte réalis

03-04-2025 12:44

Castillo Joseba Castillo Joseba

Me mandan en matgerial seco de Galicia (España),�

07-04-2025 11:20

Louis DENY

Bonjour forumSur bois imbu de de feuillu, sans dou

04-04-2025 13:33

Castillo Joseba Castillo Joseba

me mandan el material de Galicia (España) recolec

04-04-2025 11:56

Edvin Johannesen Edvin Johannesen

These 0.2-0,4 mm diam. flat to slightly convex, gr

03-04-2025 15:33

Tomaz Vucko Tomaz Vucko

Hello! I found an interesting dothideomycete in a

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Lachnellula 170424 172 Laurus novocanariensis Madeira
Miguel Ángel Ribes, 12-08-2024 09:28
Miguel �ngel RibesGood morning

This small (about 1 mm wide), stalked, sulphurous yellow species was growing on Laurus novocanariensis wood. Many apothecia had the hymenium covered with a whitish mass.


The asci were not in very good condition, but are octospotic, with croziers, IKI + and I think Hymenoscyphus or Sclerotinia type apical ring, measuring (40.2) 40.5 - 50.8 (55.4) × (3.3) 3.5 - 4.5 (5.1) µm; N = 29; Me = 46.6 × 4 µm ; Qe = 11.7 in dead state.


The ascospores are tear-shaped, without LBs, (3.5) 3.9 - 5.3 (6.6) × (1.7) 1.9 - 2.4 (2.7) µm; Q = (1.5) 1.8 - 2.6 (3.1) ; N = 67; Me = 4.6 × 2.1 µm ; Qe = 2.1.


The paraphyses are cylindrical, slightly pointed at the apex, but not lanceolate.


The ectal exciple has textura prismatica and the medullary one has textura intricata. All the apo turns red-brown with IKI.


The hairs are finely rough, slightly widened and without crystals at the apex. The margin and the exterior are covered by an abundant resinous mass of yellowish sulfur color.


With this information, going through all the genera of Lachnaceae family, I came to the genus Lachnellula, but I did not find any similar species, more than L. resinaria.


Thank you very much in advance.

Miguel Ángel Ribes.

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