Leptosillia pistaciae (Voglmayr, S. Vitale, D. Aiello, Guarnaccia, Luongo & Belisario) Voglmayr

in Voglmayr & al., Persoonia, 42: 251, 2019.. Basionym: Liberomyces pistaciae Voglmayr, S. Vitale, D. Aiello, Guarnaccia, Luongo & Belisario - in Vitale & al., MycoKeys, 40: 41, 2018.
Distribution: S - Si (Vitale & al. 2018).
Description: Thallus inapparent, not lichenized, causing cankers on twigs, branches and stems of Pistacia vera, the cankered areas with localised, sunken lesions with several central cracks. Perithecia unknown. Pycnidia superficial or immersed, (0.1-)0.17-0.26(-0.33) mm across, single to densely aggregated, subglobose or cupular, uni- or irregularly plurilocular, at first hyaline to pale brown, turning dark brown to blackish, without ostiole, irregularly rupturing at apex and exuding a pale whitish conidial drop at maturity. Pycnidial wall thin, of pale brown cells, (2-)3.5–6.3(-10) μm in diam., forming a textura angularis, with an outer, darker layer of thicker-walled and more rounded cells, and an inner layer of angular, hyaline cells giving rise to conidiophores. Conidiogenous cells holo¬blastic with sympodial proliferation, lageniform to cylindrical, (5.5-)6.5-8.5(-10) x 1.7-2.5(-2.7) µm, in dense intercalary or terminal whorls of 2-9. Conidia 1-celled, hyaline, straight to allantoid, smooth, (3.2-)3.8-4.5(-5) x (1-)1.2-1.5(-2) μm. Photobiont absent. Spot tests: all negative. Chemistry: without lichen substances.
Note: a non-lichenized fungus causing cankers on Pistacia vera, hitherto known only in the pycnidial state. It differs from L. macrospora in the shorter conidia.
Growth form: Fungus
Substrata: bark
Reproductive strategy: mainly sexual

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Predictive model

Source: Vitale S., Aiello D., Guarnaccia V., Luongo L., Galli M., Crous P.W., Polizzi G., Belisario A., Voglmayr H. 2018. Liberomyces pistaciae sp. nov., the causal agent of pistachio cankers and decline in Italy. Mycokeys, 40: 29–51.