Click for help
Lichens A-Pac (2007) - Flora of New Zealand Lichens - Revised Second Edition A-Pac
Copy a link to this page Cite this record

Chaenotheca Th.Fr.,

CHAENOTHECA Th.Fr., 1860

Type : Chaenotheca trichialis (Ach.) Th.Fr. [=Calicium trichiale Ach.]

Description : Flora (1985: 85).

Key

1
Apothecia with a yellow to reddish yellow or brown pruina on the lower side of the capitulum and/or on the upper part of the stalk
2
Apothecia with a white pruina on the lower side of the capitulum, or epruinose
10
2
Pruina yellowish or reddish yellow
3
Pruina reddish brown to brown
9
3
Mature ascospores at least in part ellipsoidal – short cylindrical
4
Mature ascospores spherical
6
4
Thallus greenish grey or immersed
5
Thallus intensely yellow
chrysocephala
5
Thallus immersed; photobiont Trentepohlia; ascospores smooth
citriocephala
Thallus episubstratic; photobiont Stichococcus; ascospores coarsely ornamented
chlorella
6
Mature ascospores 2.3–3.5 μm diam.
7
Mature ascospores 5–7.6 μm diam.; apothecia 8–16 times as long as width of stalk; stalk not flexuose
hispidula
7
Thallus immersed
8
Thallus episubstratic, greenish
confusa
8
Photobiont Stichococcus; pruina yellowish green
confusa
Photobiont Trentepohlia; pruina golden yellow to brownish yellow
degelii
9
Exciple poorly developed; asci catenulate
deludens
Exciple fairly well-developed; asci single
gracillima
10
Photobiont Stichococcus
11
Photobiont Chlorococcales
13
11
Thallus episubstratic; outer part of exciple of irregularly intertwined, mainly periclinally arranged hyphae
12
Thallus immersed; outer part of exciple at the base of anticlinally arranged, strongly swollen hyphae
xyloxena
12
Thallus thin, farinose pale greenish to bluish green; Pd+ yellow-reddish; lower side of capitulum with a whitish to pale brownish hyphal web
stemonea
Thallus thin to rather thick, verrucose to squamulose, greenish grey; Pd−; lower side of capitulum without a hyphal web but usually with a faint white pruina
trichialis
13
Thallus white to grey-white often with yellow spots (K+ purple-red); capitulum obconical; ascospores 5.6–7.7 μm diam.
ferruginea
Thallus immersed or more rarely episubstratic, dull green without yellow or red spots; capitulum spherical to lenticular; ascospores 3.4–4.6 μm diam.
brunneola

Chaenotheca, included in the family Conicybaceae (Eriksson et al. 2004; Pennycook & Galloway 2004; Eriksson 2005), is a cosmopolitan genus of some 25 known species (Tibell & Ryan 2004b), the majority inhabiting cool to temperate areas, with only a small number of taxa confined to the tropics. Species occur mainly on bark and wood with only very few growing on soil or siliceous rocks. Most species grow in sheltered habitats with low light intensity and high humidity (Tibell 1983, 1984b, 1985, 1987, 1994, 1996b, 1998a, 1999b; Tibell & Beck 2002; Tibell & Ryan 2004b). Chaenotheca is associated with four different photobiont genera, viz. Dictyochloropsis, Stichococcus, Trebouxia and Trentepohlia (Tibell 2001a; Tibell & Beck 2002). Thirteen species are recorded from New Zealand (Tibell 1987). Anamorphs are so far known only from cultures of the New Zealand species C. deludens (Tibell 1993).

Click to go back to the top of the page
Top