Chaenothecopsis vainioana (Nádv.) Tibell

Publ. Herb. Univ. Uppsala, 4: 5, 1979. Basionym: Calicium vainioanum Nádv. - Preslia, 18/19: 128, 1940.
Distribution: C - Mol (CLU 10886), Sar (Zedda 2002, Puntillo & Puntillo 2009, Cossu 2013, Brackel 2016).
Description: Thallus not evident, not lichenized. Apothecia long-stalked, pin-like, 0.4-0.6 mm high, developing on bark with trentepohlioid algae. Stalk black (sometimes with a brownish tinge), 0.04-0.07 mm thick, the central part formed by pale, periclinally arranged hyphae, the outer part dark reddish brown, formed by irregularly intertwined hyphae. Capitulum broadly obovoid, 0.2-0.3 mm across. Excipulum reddish brown, 8-15 µm thick, of periclinally arranged but intertwined hyphae. Epithecium reddish brown; mazaedium not present; hypothecium dark aeruginose green, obconical, 40-65 µm high. Asci 8-spored, cylindrical, with a thickened apex penetrated by a narrow canal, formed singly, persisting until the spores are mature. Ascospores 1-septate, brown, ellipsoid, 8-10 x 2.5-3.5 µm, with a smooth wall. Photobiont absent. Spot tests: ascocarps K+ yellowish brown, C-, KC-, P-; excipulum, epithecium, and outer part of stalk N+ slowly reddish brown. Chemistry: without lichen substances, except an unidentified reddish pigment reacting N+ reddish and K+ yellowish brown.
Note: on old oaks, more rarely on conifers, on surfaces with trentepohlioid algae; very rare throughout its range.
Growth form: Fungus
Substrata: bark and lignum
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: extremely rare
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

United States National Herbarium - Smithsonian (US:Lichens) - Collector: A. Titov Number: 1900 Date: 1989-05-14 Locality: Ukraine, The Crimea: Alushta region, Mt Cziornaya. Elevation: 500 meters (1640ft) - CC BY-NC 3.0 - Source: Consortium of Lichen Herbaria (2023) http// Accessed on December 16.