Catillaria minuta (A. Massal.) Lettau
Hedwigia, 52: 135, 1912. Basionym: Biatorina minuta A. Massal. - Ric. Auton. Lich. Crost.: 137, 1852.
Synonyms: Biatorina arnoldii Kremp.; Biatorina arnoldii var. luteella (Nyl.) A.L. Sm.; Catillaria arnoldii (Kremp.) Th. Fr.
Distribution: N - VG (25437), Frl, Ven (Watson 2014), Lomb (Lazzarin 2000b), Emil (Fariselli & al. 2020). C - Tosc (Tretiach & al. 2008), Marc (Nimis & Tretiach 1999), Umb (Ravera & al. 2006). S - Camp (Nimis & Tretiach 2004), Pugl (Nimis & Tretiach 1999), Bas (Nimis & Tretiach 1999), Si (Nimis & al. 1994, 1996b).
Description: Thallus crustose, entirely endosubstratic, whitish or poorly evident. Apothecia lecideine, 0.2-0.3(-0.4) mm across, yellowish brown to pale orange brown (pale yellow when wet), sessile, with a concave, then flat to slightly convex disc, and an initially prominent and smooth, finally excluded proper margin which is usually paler than disc. Proper exciple pale yellow in outer part, colourless within; epithecium pale yellowish brown, K-; hymenium colourless, 45-60 µm high; paraphyses simple, 1-1.5 µm thick at mid-level, the apical cells only slightly swollen, up to 2.5(-3) µm wide, weakly pigmented; hypothecium colourless to pale straw-coloured. Asci 8-spored, clavate, surrounded by a gelatinous I+ blue coat, with a well-developed I+ blue tholus, a I+ darker blue tube and a well-developed ocular chamber, approaching the Biatora-type. Ascospores 1-septate, slightly restricted at septum, hyaline, ellipsoid to ovoid-fusiform, (10-)12-16(-18) x 4-6.5 µm, the old ones with a microrugulate surface. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.Note: a mild-temperate species found on steeply inclined or rain-protected surfaces of compact limestone in sheltered situations, e.g. in narrow gorges along creeks. It probably does not belong in Catillaria s.str.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: rare
Padanian area: absent
Humid submediterranean belt: rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent
Predictive model
Herbarium samples
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (24243)
2001/12/08
Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_C/Textes_C4/Catillaria_minuta.htm
France, Combe Lavaux - Côte-d'Or
2/6/2015
Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_C/Textes_C4/Catillaria_minuta.htm
France, Combe Lavaux - Côte-d'Or
2/6/2015
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: rare
Padanian area: absent
Humid submediterranean belt: rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent
Predictive model
Herbarium samples |