M Wong Yanna Teik Khiang Goh and Kevin D Hyde Centre for Research in Fungal Diversity Department of Ecology and Biodiversity The University of Hong Kong Pokfulam Road Hong Kong email kdhydehkucchkuhk Wong MKM Yanna Goh TK and Hyde KD 2001 Two new spe ID: 57866
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Figs.1-9.Costantinellapalmicola.1.Coloniesonnaturalsubstratum(arrowed).2-4.Conidiophoreswithconidiogenouscellswhichareslightlylobedandarrangedinwhorlsontheconidiophoreaxis.Notetheswellingsatthenodes(arrowed).5.Basalhyphae(arrowed).6-9.Conidiawithtruncatebases.Bars:1=1mm;2,4-9=10/lm;3=100/lm.andarrangementofconidiogenouscellsontheconidiophores,andtheshapeandsizeoftheconidia.Duringstudiesonmicrofungiongrassesandpalmsinthetropics(GohandHyde,1996,1998;Gohetal.,1998;Yannaetal.,1998;Wongetal.,1998,1999),wehaveidentifiedtwoundescribedspeciesofCostantinella,andthesearedescribedandillustratedinthispaper.AtabulatedsynopsisofthecharactersofallCostantinellaspeciesisprovided(Table1).TheconidiophoresofthetwoundescribedspeciesofCostantinellaarenarrower(2-4/-lm)thanthoseofthethreeearlierdescribedspecieswhich,rangefrom4-15/-lmwideatthemiddle,and8-18/-lmwideatthebase.TaxonomyCostantinellapalmicolaK.M.Wong,Yanna,GohandK.D.Hyde,sp.novo(Figs.1-15,23)Coloniaeinsubstratonaturaleeffusae,pallidegriseolae,usque9mmlongaeet3mmlatae.Hyphaebasalessuperficiales,brunneae,laeves,ca.4/lmlatae.Conidiophorarecta,174 erecta,cylindrica,irregulariterramosa,brunnea,verruculosa,septata,140-300x2.5-4~m,adnodostumidosa,3.5-6~mlata.Cellulaeconidiogenaepolyblasticae,discretae,inordidemverticillatae,obovoideaevelellipsoideae,inambitislobatae,hyalinaevelolivaceo-brunneae,adapicemcumproliferationissympodicesineprogressioneetdenticulisparvispraeditae,9-12x3-6~m.Conidia5-8x3-4~m,solitaria,elliptico-fusiformiavelsub-fusiformia,unicellularia,subhyalinavelpallidissimeolivacea,laevia,adbasemtruncatacumhilominutononincrassatopraedita.Etymology:palmicola,inreferencetothepalmhost.Coloniesonnaturalsubstratumeffuse,palegreyish,upto9mmlongand3mmwide.Basalhyphaesuperficial,brown,smooth,thin-walled,ca.4f!mwide.Conidiophoresstraight,erect,cylindrical,irregularlybranchedorunbranched,brown,verruculose,septate,140-300f!mlong(x=220f!m,n=25)and2.5-4f!mwide(x=3.3f!m,n=25),swollenatthenodeswhichare3.5-6f!mwide(x=4.3f!m,n=25)wheretheverticilsofconidiogenouscellsarise.Conidiogenouscellspolyblastic,discrete,arrangedinwhorlsonthemainaxis,obovoidtoellipsoid,slightlylobedinoutline,hyalinetoolivaceousbrown,sympodiallyproliferatingwithoutprogression,andwithtinydenticlesattheapex,9-12f!mlong(x=9.8f!m,n=25),3-6f!mwideatthemiddleandthebase(x=3.8f!m,n=25),2-4f!mwideattheapex(x=2.6f!m,n=25).Conidia5-8x3-4f!m,(x=6.4x3.1f!m,n=25),solitary,elliptic-fusiformtosub-fusiform,unicellular,subhyalinetoverypaleolivaceous,smooth,truncatewithascaratthebase.Holotypus(designatedhere):HONGKONG,HongKongIsland,forestbehindTheUniversityofHongKong,ondeadpetioleofLivistonachinensis(Arecaceae),10June1997,YannaYANI24(HKU(M)5347).CostantinellaphragmitisK.M.Wong,Yanna,GohandK.D.Hyde,sp.novo(Figs.16-21,22)Coloniaeinsubstratonaturaleeffusae,floccosae,albaevelgriseolae,usque7.5mmlongaeet2.5mmlatae.Hyphaebasalessuperficiales,olivaceo-brunneae,laeves,2.5-3~mlatae.Conidiophorarecta,erecta,cylindrica,irregulariterramosa,olivaceo-brunnea,laevia,septata,325-450x2.5-4~m,deorsumleniterconstricta,2-3~mlata;sursumramsosa;ramileniterangustati(ca.2-3~mlatae),subhyalinivelpallideolivacei,15-17.5x2-2.5~mlongi.Cellulaeconidiogenaemonoblasticaevelpolyblasticae,discretae,obclavatae,hyalinae,laeves,cumproliferationissympodicesineprogressione,7.5-12.5x2-2.5~m,cumdenticulisminutismucronatispraeditae.Conidiasolitaria,globosavelsubglobosa,unicellularia,hyalina,laevia,tenuitunicata,2.5-4~mdiam.Etymology:phragmitis,inreferencetothehostPhragmites.Coloniesonnaturalsubstratumeffuse,cottony,whitetogreyish,upto7.5mmlongand2.5mmwide.Basalhyphaesuperficial,olivaceousbrown,smooth,thin-walled,2.5-3f!mwide.Conidiophoresstraight,erect,cylindrical,septate,irregularlybranchedabovethesepta,usuallywithtertiarybranching,olivaceousbrown,smooth,325-450f!mlong(x=399f!m,11=10)and2.5-4176 ~2223oFigs.22-23.CompositediagramwithcharacteristicsofCostantinellaphragmitisandC.palmicola.22.C.phragmitis.23.C.palmicola.Bars=10!lm.olivaceous,15-17.5!-lmlong(x=16.4!-lm,n=25)and2-2.5!-lmwide(x=2.1!-lm,n=25).Conidiogenouscellsmonoblasticorpolyblastic,discrete,obclavate,hyaline,smooth,sympodiallyproliferatingwithoutprogression,7.512.5!-lmlong(x=10.4!-lm,n=25)and2-2.5!-lmwide(x=2.1!-lm,n=25),denticulate;denticlesminute,tapering,restrictedtoasmallregionattheapex.Conidiasolitary,globosetosubglobose,unicellular,hyaline,smooth,thinwalled,2.5-4!-lmdiam.(x=3.2!-lm,n=25).Holotypus(designatedhere):HONGKONG:NewTerritories,MaiPoMarshes,GeiWaino.9,onaerialpartofasenescentculmofPhragmitesaustralis(Poaceae),7August1997,K.M.WongMW147PH52(HKU(M)8002).178 Table1.(continued).ConidiaC.clavata(HolubovaJechova,1980)Clavateorobpyriform,smooth,truncateatthebase,hyaline,4-8x34fJmC.micheneri(Ellis,C.palmicolaC.pluagmitis1971;HolubovaJechova,1980)GlobosetosubgloboseElliptic-fusiformtoGlobosetosubglobosewithaninconspicuoussub-fusiform,withaninconspicuousapiculus,hyaline,subhyalinetoverypaleapiculus,hyaline,smoothorfinelyolivaceous,smooth,smooth,thin-walled,echinulate,3.5-4.5(-5)truncatewithascarat2.5-4fJmdiam.f!mdiam.thebase,5-8x3-4fJmC.terrestris(Ellis,1971;HolubovaJechova,1980)Globosetosubglobosewithaninconspicuousapiculus,hyaline,smoothtofinelyroughened,4-5.5fJmdiam.DiagnosticfeaturesClavatetoobpyriformconidiaRecurvedConidiogenouscellsconidiogenouscellsslightlylobedformingwithoutsterilesetiformwavyoutlineapexBranchinguptotertiarylevel,denticlesslenderandelongatedRecurvedconidiogenouscells,conidiophoreswithsterilesetiformapexHabitatOnrottenconiferwoodOnwooddebrisOndecayingpetiolesOndecayingculmsofOndecayingwoodandofLivistonachinensisPhragmitesaustralisplantdebris