A. Poli, E. Bovio, L. Ranieri, GC. Varese & V. Prigione, Frontiers Microbiol 11 (933): 9 (2020)


Sordariomycetes Subclass: Lulworthiomycetidae






Type species: Paralulworthia gigaspora A. Poli, E. Bovio, L. Ranieri, G.C. Varese & V. Prigione, Frontiers in Microbiology 11 (no. 933): 9 (2020) 

Mycobank MB833288

Growing efficiently on Pinus pinaster. Hyphae 3.2 μm wide, septate, from brownish to hyaline. Chlamydospores numerous, solitary and multicellular, from one to four celled, 2 × 3 μm diam., from light to dark brown, globose and subglobose.

Sexual morph: Ascomata 480 − 540 μm high, 160 – 270 μm wide, subglobose to ellipsoidal, single, scattered, immersed in the cortex or erumpent, brown to black at maturity; peridium dark brown 73 − 88 μm thick composed of several layers of thick–walled cells of textura angularis. Asci 115 × 30 μm, fusiform to cylindrical, containing 8 spores, dehiscent, hyaline, vertically oriented to the host surface. Sterile elements not observed. Ascospores 76 − 83 × 19 − 25 μm uni- to 3-septate at maturity, constricted at septa (particularly the central one), ellipsoid to fusiform, pointed at both ends, thin-walled, from light to dark brown at maturity, straight.

Asexual morph not observed.

Colony description: colonies growing on MEASW, reaching 90 mm diam. after 28 days at 21° C, mycelium floccose, beige, reverse bordeaux. A caramel coloured diffusible pigment often present.

Key to species in the genus: N/A


Image: 28-days-old colony incubated at 21 °C on MEASW (A) and reverse (B); ascomata (C, E), peridium with textura angularis (D); asci with eight ascospores at different degrees of maturity (F). Scale bars 20 µm

Image based on Poli et al. (2020) Frontiers Microbiol 11 (933): 9 (2020)

Type & Location:
Other Specimens:
rhizomes of Posidonia oceanica
Europe, Italy, Tuscany, Mediterranean Sea, Elba Island (LI), Ghiaie ISL, 3-5 m depth
Pertinent Literature:
Poli, A., Bovio E., Ranieri L., Varese GC and Prigione V. 2020. Fungal diversity in the Neptune forest: the cultivable mycobiota of Posidonia oceanica. Frontiers in Microbiology, 11, 993; doi: 10.3389/fmicb.2020.00933 (2020).
This species is generally identified by the size of ascomata and ascospores. Genomic DNA of P. gigaspora, was extracted and their 18S, ITS1-5.8S-ITS2 and 28S genes sequenced for a phylogenetic analysis of Lulworthiaceae. The isolates of P. gigaspora formed a strongly supported and separated clade (BYPP = 1.00; MLB=100%) within Lulworthiaceae, close to the genus Lulworthia sensu latu. Consequently, a new genus was erected to accommodate this taxon: Paralulworthia.
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    Fig 1


Mushroom Research Foundation 
Chiang Rai 


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