Caloplaca tenuata (Nyl.) Zahlbr.
Cat. Lich. Univ., 7: 271, 1931. Basionym: Placodium tenuatum Nyl. - Flora, 62: 202, 1879.
Synonyms: Lecanora tenuata (Nyl.) Nyl.
Distribution:
Description: Thallus crustose-placodioid, ochraceous yellow to orange, forming small, rarely > 1 cm wide rosettes, the marginal lobes contiguous, short, 0.3-0.7 mm wide, flat to very slightly convex. Apothecia zeorine, with an orange disc and a usually slightly paler margin. Epithecium orange, K+ purple-red; hymenium and hypothecium colourless; paraphyses branched in upper part. Asci 8-spored, clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores 1-septate, sometimes slightly constricted at septum, polarilocular, hyaline, narrowly ellipsoid to narrowly fusiform, straight ot slightly curved, 12-20 x 4-6 µm, the equatorial thickening (“septum”) 1-3(-4) µm, <1/4 of spore length. Photobiont: chlorococcoid. Spot tests: thallus and apothecia K+ purple-red, C-, KC-, P-. Chemistry: thallus and apothecia with unidentified anthraquinones.Note: a mainly Mediterranean-submediterranean species of sun-exposed, compact calcareous rocks, rarely lichenicolous on Bagliettoa, similar in habit to Flavoplaca polycarpa, with which it has been frequently confused (see Roux & Coll. 2025), but differing in the narrowly ellipsoid to narrowly fusiform ascospores with a thin septum. The species does not belong to Caloplaca s.str. An earlier record from Venezia Giulia (Nimis 1993: 185) refers to F. polycarrpa. To be looked for in Italy
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Predictive model
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta,
400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl.
Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Predictive model
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
Felix Schumm - CC BY 4.0
[VZ1420, 19607], Gallia, Vaucluse, Lafare, in praerupta La Salle dicta, 400 m. Ad parietem altum rupis calcareae. Leg. G. Clauzade et Cl. Roux, 8.1.1976. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1420.
