Involucropyrenium (Verrucariaceae), a lichen genus new to China

Abstract

The genus Involucropyrenium is reported from China for the first time. It is characterized by a minutely squamu-lose thallus, perithecia situated between the squamules, an involucrellum enveloping the whole ascomata, and comparatively large ascospores.

Full text

中国地衣新记录属———包被鳞核衣属
孙中帅1,任 强1,刘华杰2,赵遵田1
( 1 山东师范大学生命科学学院,山东 济南 250014; 2 河北大学生命科学学院,河北 保定 071002)
摘要:报道中国地衣 -新记录属———包被鳞核衣属。该属主要特征:地衣体小鳞片状,子囊器为子囊壳,
着生于地衣体小鳞片之间,由一特化的外壁所包裹,子囊孢子较大。
关键词:地衣 ;新记录属;瓶口衣目
中图分类号:Q949.34 文献标识码:A 文章编号: 0253 -2700 (2008) 06 - 655- 02
Involucropyrenium (Verrucariaceae) , a Lichen Genus New to China
SUN Zhong-Shuai1,REN Qiang1,LIU Hua-Jie2,ZHAO Zun-Tian1 **
(1 College of Life Sciences,Shandong Normal University,Jinan 250014, China;
2College of Life Sciences,Hebei University ,Baoding 071002, China)
Abstract:The genus Involucropyrenium is reported from China for the first time .It is characterized by a minutely squamu-
lose thallus,perithecia situated between the squamules,an involucrellum enveloping the whole ascomata,and comparative-
ly large ascospores .
Key words:Lichen;New record;Verrucariales
Extensive studies on the lichen family Verrucariaceae have
greatly clarified the taxonomy of this group (Breuss, 1985,
1990, 1996; Heidmarsson, 1998 ; Thomson, 1987 ; McCarthy,
1995) , notably through improved delimitations of existing genera
and the creation of new taxa,such as the genus Involucarcro-
pyrenum (Breuss, 1996) . This genus was proposed to accommo-
date 4species previously included in Catapyrenium,and hitherto
contains 8species (Breuss, 1996 ; Breuss and Türk, 2004) . It
is widespread in temperate regions (Kirk et al. , 2001) , but has
not been reported from China before .
During our recent fieldwork in Qilian Mountains,Northwest-
ern China,collections with a minutely squamulose thallus and
globose,black perithecia were subsequently identified as Involu-
cropyrenium waltheri .We present here the species and the occur-
rence of Involucropyrenium from China for the first time .
Materials and Methods
Specimens examined in the present study are deposited in
Lichen Section of Botanical Herbarium,Shandong Normal Uni-
versity (SDNU) .
For the study of morphology and anatomy,a dissecting mi-
croscope (Motic K-400L)and a light microscope (JNOEC XS-
213) were used .Chemical substances in the lichen were exam-
ined by thin layer chromatography (TLC) ( Culberson, 1972) .
Results and Discussions
Involucropyrenium Breuss,Annln naturh .Mus .Wien,
Ser .B,Bot .Zool .98 ( Suppl .) : 37 ( 1996) Type species:In-
volucropyrenium waltheri (Kremp .) Breuss
Thallus minutely squamulose and crust-like;closely adnate,
attached by a tufts of rhizohyphae or rhizines;isidia and soredia
absent;upper surface brownish or greenish gray to brown,dull;
ascomata perithecial,between the squamules,globose,with
clear involucrellum;periphyses present;asci clavate, 8-spored;
ascospores simple,hyaline,thin-walled,smooth,biseriately ar-
ranged;pycnidea absent .
云 南 植 物 研 究 2008, 30 (6) : 655～656
Acta Botanica Yunnanica DOI: 10.3724SP.J.1143.2008.08063
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Author for correspondence ;E-mail :ztzhao@sohu.com
Received date: 2008 - 04 - 11 , Accepted date : 200 8 - 06 - 30
作者简介:孙中 帅 ( 1985 - ) 男,在 读硕士 研究 生,主要从事地衣资源与分类学研究。 
Foun dation items:The National Natural Science Fundation of China ( 39899400 ) and Shandong Provincial Natural Science Foundation (Y2007D21)

Fig . 1 Thallus of Involucropyrenium waltheri showing
the minutely squamulose and crust-like thallus .
Scale = 1 mm,Sun Zhong-Shuai , 20071492 - 2
Fig . 2 Perithecia of Involucropyrenium waltheri showing
the clear,entire involucrellum .Scale = 50μm,
Sun Zhong-Shuai, 20071492 - 2
Habitat:on soil,humus or rocks .
Involucropyrenium waltheri (Kremp .) Breuss,Annln .
naturh .Mus .Wien,Ser .B,Bot .Zool . 98 ( Suppl .) : 38
(1996) . (Figs . 1 &2)
≡ Catapyrenium waltheri (Krempelh .) Krber,Syst .Lich .
Germ . 325 . 1855
≡Verrucaria waltheri Krempelh,Flora 38: 69 (1855) .
Thallus minutely squamulose;squamules 0.5 - 1.3 mm
wide,firmly adpressed and confluent to form a continuous,crust-
like cover over the substrate;upper surface matt,fawn,not pru-
inose;rhizoidal hyphae black,forming a dense,dark hypothal-
lus .Perithecia black,spherical,semi-emergent,situated be-
tween the squamules,often aggregated to groups or lines;exciple
dark brown to black;involucrellum black ,entire, 25 - 30 μm
thick;periphysis simple, 30 - 40μm long;asci clavate,thin-
walled, 8-spored;ascospores 18 - 23×7 - 10μm,ovoid to clav-
ate,colorless,biseriate .
Chemistry:no lichen substances detected by TLC .
Habitat:on soil and humus .
Specimens examined:China .Qinghai Province:Menyuan
county,Mt .Lenglongling,alt .3 600m.on soil .August 7th 2007 .
Zhao Zun-tian, 20070956; Qilian County,Mt .Niuxinshan,alt .
3 100 m.August 11th 2007 . Sun Zhong-shuai, 20071492 - 2 .
Comments:Involucropyrenium comprises 8species
(Breuss and Türk, 2004) . Involucropyrenium waltheri can be
readily distinguished from I.nuriense,I.tremniacense and I.sq-
uamulosum by having entire involucrellum,while involucrellum
of the latter three is not entire .The rest 4species (I.llimonae,
I.sbarbaronis,I.terrigenum and I.pusillum)also have an en-
tire Involucrellum ,but their rhizines are colorless or brownish .
Acknowledgements:The authors would like to acknowledge Dr .
Wang Hai-Ying for his valuable suggestions .They are also very
grateful to Dr .Cecile Gueidan (Institute of the Royal Academy of
Arts and Sciences,Netherlands)for providing them the useful
references .
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