|
1 |
Xanthones absent |
2 |
| 1a |
Xanthones present |
4 |
|
2 |
Norstictic acid present; spores 84-144 µm long; S.Am. |
P. reagens (Zahlbr.) Redinger  |
| |
Spores 90-120 µm long; ostioles black; West Indies |
P. plana Vain.  |
| 2a |
Stictic acid present |
3 |
|
3 |
Stictic acid only present; spores 87-137(-165) µm long; ostioles punctiform; Java |
P. javanica Müll. Arg. |
| |
Spores 140-160 µm long; ostioles becoming disciform; West Indies |
P. dussii Vain.  |
| 3a |
Stictic and 2'-O-methylperlatolic acid present; spores 100-130 µm long; Aus P360 |
Pertusaria sp. |
|
4 |
Lichexanthone present |
5 |
| 4a |
Chlorinated lichexanthones present |
9 |
|
5 |
Lichexanthone and stictic or constictic acids present |
6 |
| 5a |
Fatty acids present or lichexanthone alone |
8 |
|
6 |
Lichexanthone and stictic acid present |
7 |
| 6a |
Lichexanthone and constictic acid present; spores [sl. rough]125-160 µm long; S.Am |
P. ochrostoma Müll. Arg.  |
|
7 |
Spores 97-125 µm long; S.Am. |
P. tenella Müll. Arg. |
| 7a |
Spores 135-165 µm long; S.Am |
P. tetrathalamia var. plicatula Müll. Arg. |
| 7b |
Spores 70-90 µm long; with additional confluentic acid; Tahiti |
P. trypetheliformis Nyl.  |
| 7c |
Spores 115-138 µm; with additional 2-O-methyl- and 2,4-di-O-methylolivetoric acid S.Am |
P. ochrotheliza Nyl.  |
|
8 |
Lichexanthone and fatty acids present; spores 125-165(-200) µm long; S.Am. |
P. anisospora Müll. Arg.  |
| 8a |
Lichexanthone alone; spores 90-95 µm long; Aus. |
P. subcerussata A.W. Archer |
|
Spores 125-155 µm long; S.Am |
P. tetrathalamia var. confirmans Müll. Arg. |
|
9(4a) |
2-Chlorolichexanthone present |
10 |
| 9a |
Polychlorinated lichexanthones present |
11 |
|
10 |
Additional stictic acid present; spores 120-165 µm long; Java |
P. placentiformis (Mont. & Bosch) Müll. Arg.  |
| 10a |
Additional stictic and 2'-O-methylperlatolic acids present; spores 115-125 µm long; Aus |
P. pallida A.W. Archer & Elix |
|
11 |
2,4-, 2,5- Dichlorolichexanthones and 2,4,5-trichlorolichexanthone present |
12 |
| 11a |
4,5-Dichlorolichexanthone present |
13 |
|
12 |
Thallus not isidiate; with additional 2-O- and 2'-O-methylperlatolic acids; spores 80-110 µm long; Aus, PNG, New Caledonia [±stictic acid] |
P. elliptica Müll. Arg. |
| 12a |
Thallus isidiate; with stictic acid; spores 80-95 µm long; Aus, NZ |
P. subisidiosa A.W. Archer |
|
13 |
4,5-Dichlorolichexanthone only present; spores 80-110 µm long; Aus. |
P. leucophaea Elix & A.W. Archer  |
| 13a |
4,5-Dichlorolichexanthone and additional compounds present |
14 |
|
14 |
Additional planaic acid present; spores 75-97 µm long; Aus |
P. leucothelia Müll. Arg. |
| 14a |
Additional stictic acid present |
15 |
|
15 |
4,5-Dichlorolichexanthone and stictic acid present |
16 |
| 15a |
4,5-Dichlorolichexanthone, stictic acid and additional compounds present |
17 |
|
16 |
Spores 75-150 µm long; N.Am, S.Am. |
P. tetrathalamia (Fée) Nyl. |
| 16a |
Spores 130-150 µm long; West Indies |
P. ascisidioides Vain |
|
17 |
Stictic acid, ±2-chlorolichexanthone ±4-chlorolichexanthone present; spores 100-135 µm long; S.Am. |
P. tetrathalamia var. decipiens Müll. Arg.  |
| 17a |
Stictic and 2'-O-methylperlatolic acids present; spores 80-106 µm long |
18 |
| 18 |
Thallus isidiate; Thailand |
P. microstoma Müll. Arg. var. isidiata Jariangprasert |
| 18a |
Thallus not isidiate; Aus, Java, PNG, New Caledonia |
P. microstoma Müll. Arg. |