Llanvirn section, Moncorvo (Ordovician of Portugal)

Also known as Xistensa Fm., Moncorvo, Portugal

Where: Portugal (41.0° N, 7.0° W: paleocoordinates 72.0° S, 78.4° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Xistenta Formation, Oretanian (468.0 - 459.0 Ma)

• PJW: only the top of the section is Dobrotiva; this is supposed to be "Llanvirn," so presumably this is Oretanian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; pyritic, cherty/siliceous slate

• Massive light-colored slate with rare pyrite and siliceous and pyritic nodules

Size classes: macrofossils, mesofossils

Primary reference: J. A. Rebelo and I. Rabano. 1986. A contribution to the lithostratigraphy and palaeontology of the lower Palaeozoic rocks of the Moncorvo region, Northeast Portugal. Comunicacoes dos Servicos Geologicos de Portugal 72(1-2):45-57 [A. Miller/P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 21013: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 14.06.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

 Rhombifera - Caryocystitidae
Heliocrinites sp. Eichwald 1840
Blastoidea
 Coronata - Stephanocrinidae
Mespilocystites sp. Barrande 1877 blastoid
Rhombifera
 Hemicosmitoida - Caryocrinitidae
Pterobranchia
 Graptoloidea - Dichograptidae
"Didymograptus cf. artus" = Didymograptus (Didymograptus) artus
"Didymograptus cf. artus" = Didymograptus (Didymograptus) artus Elles and Wood 1901 graptolite
Rhynchonellata
 Orthida - Orthidae
Orthis sp. Dalman 1828
Rostroconchia
 Ribeirioida - Ischyriniidae
Tolmachovia sp. Howell and Kobayashi 1936
 Ribeirioida - Technophoridae
Bivalvia
 Modiomorphida - Modiomorphidae
 Cardioni - Babinkidae
Babinka prima Barrande 1881 clam
Ostracoda
 Hollinocopida - Euprimitiidae
? Primitiella sp. Ulrich 1894 ostracod
Trilobita
 Phacopida - Homalonotidae
Colpocoryphe sp. Novak and Perner 1918 trilobite
 Phacopida - Calymenidae
? Neseuretus sp. Hicks 1873 trilobite
Salterocoryphe sp. Hammann 1977 trilobite
Pradoella cf. pradoi Hammann 1977 trilobite
 Asaphida - Asaphidae
? Ogygites sp. Tromelin and Lebescote 1876 trilobite
? Nerudaspis sp. Pribyl and Vanek 1965 trilobite