Large dasycladalean algae from Upper Jurassic limestone deposits of the Apuseni Mountains (Romania) — habitat and depositional environment

Geodiversitas

Emanoil Săsăran¹  Ioan I. Bucur¹ 

关键词: Calcareous algae;    Dasycladales;    Paleoenvironment;    Upper Jurassic;    Apuseni Mountains;    Romania;    Algues calcaires;    Dasycladales;    paléoenvironnement;    Jurassique supérieur;    monts Apuseni;    Roumanie;   

DOI  :  10.5252/g2012n1a12

学科分类：生物科学（综合）

来源: Museum National d Histoire Naturelle

【 摘 要 】

Threespeciesofdasycladaleanalgaearedescribed:PetrasculapiaiBachmayer,1944,P.bursiformis(Etallon,1859)andSteinmanniporellakapelensis(Sokačamp;Nikler,1973).Twoofthem,PetrasculapiaiandSteinmanniporellakapelensis,arerelativelyseldomreportedandconsequentlypoorlyknownalgae.TheywerefoundattwolocationsintheApuseniMountains:Sănduleştiquarry(TrascăuMountains)andŞerbotaHill(nearAştileu,PădureaCraiuluiMountains).ThetwospeciesofPetrasculawereessentiallyidentifiedfromsectionsofthestalk.Theirstudyprovides,especiallyforP.piai,usefulsupplementarydatarelatedtothemorphologyofthelateralsandthestructureofthestalk.RegardingSteinmanniporellakapelensis,Sănduleştiisonlythesecondlocality(afterthetypelocality)wherethisalgaisknowntooccurasnumerouswellpreservedspecimens.Microfaciesandsedimentologicaldatasuggestthatthesealgaewererestrictedtomicro-environmentswithintheexternalpartofthecarbonateplatforms.

【 授权许可】

Unknown