Bulletin of the British Museum (Natural History)
Bulletin of the British Museum (Natural History)
Bulletin of the British Museum (Natural History)
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108 BRIAN JOHN COPPINS<br />
6a (5b) Pycnidial wall and stalk dark purple-brown, K-l- dark green. Mesoconidia 3-4-4-3X<br />
l-2-l-6)u,m 29. M. nigella (p. 163)<br />
6b Pycnidial wall dark olivaceous, K— ; stalk fuscous or reddish-brown, K— 7<br />
7a (6b) Mesoconidia 3-5-4-8X 1-1-5 /xm. On bryophytes, shaded rocks and stones or exposed<br />
roots, rarely on lignum 6. M. botryoides (p. 118)<br />
7b Mesoconidia2-6-3-6xl-l-3/Lim. Onlignum 24. M. melaeniza (p. 155)<br />
8a (4b) Thallus <strong>of</strong> pale to dark green goniocysts, 12-40 /x.m diam; goniocysts containing purple<br />
oily substance in K. Pycnidia brown with white tomentum. Mesoconidia (4-)4-5(-6)x<br />
1-3-1-7/xm 15. M. hedlundii (p. 135)<br />
8b Thallus indistinctly areolate or rimose, or endoxylic, without goniocysts, K— . Pycnidia<br />
without tomentum 9<br />
9a (8b) Pycnidia whitish, C-l- red (gyrophoric acid) . Mesoconidia<br />
4—6 x 1-1-5 /im<br />
35. M. pycnidiophora (p. 179)<br />
9b Pycnidia C— , whitish or reddish brown 10<br />
10a (9b) Pycnidia whitish, <strong>of</strong>ten branched. Mesoconidia 6-8x1-1-8 ^tm. Usually on bark, in<br />
oceanic areas 37. M. stipitata (p. 182)<br />
10b Pycnidia reddish brown, rarely branched. Mesoconidia 3-5-4-5 x 1-2-1-6 fim. On lignum in<br />
boreal regions 3. M. anterior (p. 112)<br />
11a (3b) With whitish, cushion-like, apo<strong>the</strong>cia-like sporodochia c. 0-1-0-25 mm diam, bearing<br />
oblong-ellipsoid macroconidia 6-10x2-3 /xm (immersed, inconspicuous pycnidia containing<br />
mesoconidia 4-5-3x1-2-1-5 /am may also be present). All parts C- (t.l.c: nil). On<br />
lignum or decaying bark <strong>of</strong> old stumps 1. M. adnata (p. 108)<br />
lib Sporodochia absent . Thallus and/or pycnidia C -I- red (gyrophoric acid) or C - (t . 1 . c . : 'prasina<br />
unknowns') 12<br />
12a (lib) Thallus <strong>of</strong> pale to dark green (sometimes K-l- violet) goniocysts 12-60 /x,m; pycnidia, if<br />
present, 30-80 yam diam containing ei<strong>the</strong>r (5-)5 -5-8x0-7-1 /xm microconidia, or<br />
(3-5-)4-6 X 1-2-1-7 ^tm mesoconidia. All parts C- (t.l.c. : 'prasina unknowns')<br />
34. M. prasina (p. 173)<br />
12b Thallus areolate, or scurfy (invaded by dematiaceous hyphae and foreign algae), or ±<br />
endoxylic; thallus and/or pycnidia usually C-l- red (gyrophoric acid) ; sometimes with curved<br />
or flexuose macroconidia 13<br />
13a (12b) With numerous pycnidia containing mesoconidia, 3-5-4-5x1-3-2 /xm, <strong>of</strong>ten<br />
extruded as conspicuous white blobs; in addition, pycnidia containing microconidia<br />
(4-)4-5-6(-6-5)x 0-7-1 /xm, or curved macroconidia 12-12x1 /xm, sometimes present;<br />
pycnidia walls with pale olivaceous pigment, K-l- violet. Usually on lignum, commonly on<br />
worked timber 11. M. denigrata(p. 127)<br />
13b Pycnidia usually with longer, curved or flexuose macroconidia; smaller pycnidia with microconidia<br />
sometimes present; mesoconidia unknown; pycnidial walls hyaline or greenish, K—<br />
On various substrata, rarely on worked timber 14<br />
14a (13b) Macroconidia curved or hamate, 21-40x1-1-5 /xm. Microconidia (5-)6-7(-7-7)x<br />
0-4-0-7 IX,. On various substrata but most commonly encountered without apo<strong>the</strong>cia on<br />
bark <strong>of</strong> old trees (especially Quercus) in old woodlands 33. M. peliocarpa (p. 169)<br />
14b Macroconidia flexuose, 50-110x1 ixm. Microconidia (3-8-)4-5x0-5-0-7 /xm. Seen without<br />
apo<strong>the</strong>cia on shaded lignum in woodland, and over bryophytes in open montane situations<br />
1. Micarea adnata Coppins, sp. nov.<br />
(Figs 7A, 36-37; Map 1)<br />
The species<br />
7. M. cinerea (p. 121)<br />
Thallus effusus, tenuis, ± laevis vel furfuraceo-granulosus, pallide griseo-viridis, plerumque nonnihil<br />
cereus. Algae cellulis 4—7 fxm diam. Apo<strong>the</strong>cia pallide eburnea vel straminea vel demum pallide rufescen-<br />
tia, immarginata, adnata, primum planiuscula mox convexa, 0-2-0-4(-0-6) mm diam, interdum coalescentia<br />
in fasciculosos noduliformes ad 2 mm diam. Hymenium 35-40 ^im altum, ± hyalinum. Ascosporae<br />
ellipsoideae, ovoideae, oblongo-ellipsoideae, oblongo-ovoideae vel oblongae, (O-)l-septatae, 9-16x<br />
.