Observation 271997: Graphis handelii Zahlbr.

When: 2015-04-24

Collection location: Sintra, Portugal [Click for map]

Who: zaca

No specimen available

Notes:
(See Observation 271993)

SPECIES: Graphis handelii
DATE: 2015/04/24
SPECIMEN Nº: 7303
PLACE: Sta. Eufémia, Serra de Sintra, Sintra, Portugal
HABITAT: Mixed forest, dominated by Quercus trees
SUBSTRATE: Acer pseudoplatanus
MICRO FEATURES

  • Striation: Entire
  • Carbonization: Lateral
  • Inspersion: Inspersed
  • Ascospores: Transverse – small
    • GROUP No.: 6

CHEMISTRY: K+y_r (yellow to red)
ASCOSPORES DIMENSIONS:
(14.9) 17 – 22 (24.4) x (5.7) 6.4 – 7.4 (7.9) µm
Q = (2.1) 2.5 – 3.2 (3.5); N = 32
Me = 19.4 × 6.9 µm; Qe = 2.8

EVOLUTION IN THE KEY:
Group 6: Labia entire, excipulum laterally carbonized, hymenium inspersed,
ascospores transversely septate:
1 Norstictic or stictic acid (K+ yellow or K+ yellow forming red crystals). . . . . . . 2
2 (1) Norstictic acid (K+ yellow forming red crystals). . . . . . . . . . . . . . . . . . . . 4
4 (2) Ascospores small to very small (15–45 × 5–9 μm); lirellae variable . . . . . . 5
5 (4) Disc non-pruinose (handelii-morph); pantropical. . . . Graphis handelii Zahlbr.

EXTERNAL LINKS:
http://www.discoverlife.org/mp/20p?see=I_RL161&res=640
http://www.seaveyfieldguides.com/...

Images

Microscopy: Apothecial sections;
Microscopy: Asci-1;
Microscopy: Asci – 2;
Microscopy: Spores.
Specimen-ink sketch
Specimen-scale

Proposed Names

87% (1)
Recognized by sight
Used references: Ref. 1 – Robert Lucking, Alan W. Archer, and André Aptroot : A world-wide key to the genus Graphis (Ostropales: Graphidaceae), The Lichenologist 41 (4): 363-452, 2009;
Ref. 2 – Robert Lucking: The taxonomy of the genus Graphis sensu Staiger (Ascomycota: Ostropales: Graphidaceae), The Lichenologist 41 (4): 319-362, 2009;
Ref. 3 – Robert Lücking, José L. Chaves, Harrie J. M. Sipman, Loengrin Umaña, and André Aptroot: A first assessment of the Ticolichen Biodiversity Inventory in Costa Rica: The genus Graphis, with notes in the genus Hemithecium (Ascomycota: Ostropales: Graphidaceae), Fieldiana Botany 46 (Jul 2008):1-126, 2009;
Ref. 4 – Zacarias Lepista and André Aptroot: Seven species of Graphis from Portugal reported new to Europe, The Lichenologist 48(4): 259–267 (2016).
Based on microscopic features
Based on chemical features

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