Tuber vesiculosum (Tuberaceae, Pezizales), a new species in the /maculatum clade, found in northern Spain

2025/07/31 by Cabero, Julio, Alvarado, Pablo, Alonso, Julián +1
#Pezizales #Tuber #Tuberaceae #truffle

paper · doi:10.25664/art-0412

Abstract

A new truffle species, Tuber vesiculosum sp. nov., is described from mixed deciduous forests in Cades, Cantabria (Spain), where it was found in association with Corylus avellana. This species belongs to the white truffle group (maculatum group) and is characterized by irregularly globose, cream-coloured ascomata with a glabrous peridium and a marbled, aeriferous gleba. Microscopically, T. vesiculosum presents a pseudoparenchymatous peridial structure and a trama composed of swollen, vesicular cells — a distinctive trait of the species. Asci are prototunicate, indehiscent, and variably spored (1–5), with ellipsoidal to subglobose, reticulate-alveolate ascospores. Morphologically and molecularly (ITS rDNA), T. vesiculosum is closely related to T. maculatum but differs in peridial anatomy and glebal structure. Ecological and morphological traits support its recognition as a new species within the Tuber genus.

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