Silurian and Early Lower Devonian miospores from South America

(1)

Silurian and early Lower Devonian miospores from

South America

Philippe Steemans &

(2)

Siluro-Devonian miospore localities

(3)

(4)

Siluro-Devonian miospore localities

(5)

Miospore biostratigraphy at the S/D boundary libycus -poecilomorphus Apiculiretu-sispora libycus -poecilomorphus cf. protophanus

-verrucatus cf. protophanus -verrucatus Apiculiretu-sispora Apiculiretu-sispora tripapillatus -spicula Apiculiretusispora sp. E Apiculiretu-sispora tripapillatus -spicula tripapillatus -spicula Biozone A Apiculiretusispora sp. E micornatus -newportensis micornatus -newportensis tripapillatus -spicula downiei -saggitarius brevicosta -verrucatus micornatus -newportensis brevicosta -verrucatus Aneurospora subzone brevicosta -verrucatus elegans -cantabrica hemisphaerica reticulata -sanpetrensis libycus -poecilomorphus ? libycus -poecilomorphus ? A B 1 2 3 4 5 6 Non spinoze emsiensis breconisporites -zavallatus MN BZ Z E N R Si G 7 PoW polygonalis -emsiensis M 6

(6)

Miospore biostratigraphy at the S/D boundary

(7)

Moesian plateform localisation Moesia (Bulgaria, Romania) M, Si, G, Z phylogenic zones

(8)

(9)

Brittany, Steemans 1989

Solimoes, Rubinstein & Steemans 2005 Parana, Dino & Rodriguez 1995

Amazonas, Steemans et al. in press.

(10)

Miospore biostratigraphy at the S/D boundary D . em si en si s m or ph on ?

(11)

(12)

Urubu area

(13)

Stratigraphy

After Grahn & Melo 2003

(14)

Miospores belonging to the Chitinozoan assemblage A Ludlow Chelinospora poecilomorpha Emphanisporites protophanus Scylaspora downiei Synorisporites verrucatus

(15)

Miospores belonging to the Chitinozoan assemblage B

Pridoli

Chelinospora

cantabrica Clivosispora verrucata

Artemopyra urubense n. sp. Cymbosporites

verrucosus Brochotriletes foveolatus HGF 312 ? Aneurospora richardsonii Emphanisporites sp. D in R. et al.

(16)

Chomotriletes sp. A

(17)

Chomotriletes sp. A

(18)

Miospores belonging to the Chitinozoan assemblage C

Early Lochkov

Perotrilites laevigatus _{Amicosporites streelii} Aneurospora isidori

Retusotriletes maculatus Synorisporites tripapillatus Dictyotriletes emsiensis 6 MN N R Si G PoW M BZ Z E Lochkov. Pragian

(19)

Grandispora sp. A

Brazil

(20)

(21)

(22)

Quebrada Ancha

(23)

Quebrada Ancha localisation and lithostratigraphy SAN JUAN Jáchal Río Jáchal 20 km

Río San Juan Bolsón de Gualilán Talacasto Rodeo Huaco Niquivil Tucunuco S ie rr a de V ill ic u m N 100 km San Juan 70º W 29º S 31ºS 68º W 68º W Jáchal San Juan 31ºS- 30ºS-69º W -San Juan Argentina Quebrada Ancha L a C h il c a F o rm a ti o n (3 0 m ) 60675 60701 60693 60694 60726 60728 60730 60732 60733 60734 60736 60737 60798 60799 60800 60801 60803 60805 60967 60969 60970 60971 60972 60973 60975 10 m Los Espejos Formation Palyniferous samples Barren samples o o L o s E s p e jo s F o rm a ti o n (2 3 5 m ) Talacasto Formation 50 m 60662 62523 62521 60659 60704 60667 60673 60664 60677 60976 60977 60978 60980 60982 60984 60986 61020 o o o o Palyniferous samples Barren samples o

(24)

Miospore species from the Los Espejos Formation

(25)

The C. cassicula lineage

hemiesferica Cf. hemiesferica lavidensis media cassicula PRIDOLI LOCHKOV

(26)

Palaeogeographic comments

(27)

(28)

(29)

(30)

Běkuji

Thank you for your attention Gracias

Obrigado Merci Etc ...