Biohorizon in the Baltograptus cf. B. deflexus Biozone of the Muñayoc section (Ordovician of Argentina)

Also known as Muñayoc section

Where: Jujuy, Argentina (22.7° S, 66.1° W: paleocoordinates 44.5° S, 128.2° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Baltograptus cf. B. deflexus graptolite zone, Early/Lower Ordovician (485.4 - 470.0 Ma)

Environment/lithology: deep subtidal; volcaniclastic mudstone and volcaniclastic sandstone

• A 150-m-thick volcano-sedimentary succession that evidences an upward progression from mudstone-dominated dysaerobic outershelf deposits to sandstone-dominated deposition under storm and wave influence, with an upper sandier partrelated to a general regressive trend.

Size class: microfossils

Collection methods: quarrying,

• The studied material is housed in the paleontological collection of the Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), CONICET and Universidad Nacional de Córdoba, Argentina, under the prefix CEGH-UNC.

Primary reference: G. A. Lo Valvo, N. C. Herrera Sánchez, and B. A. Toro. 2020. Early-Middle Ordovician graptolites from the Argentine Puna: quantitative paleobiogeographic analysis based on a systematic revision. Ameghiniana 57(6):534-554 [E. Vlachos/N. Herrera Sánchez/N. Herrera Sánchez]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 220276: authorized by Evangelos Vlachos, entered by Nexxys Herrera Sánchez on 13.05.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

 Graptoloidea - Dichograptidae
"Expansograptus holmi" = Didymograptus holmi, "Expansograptus pusillus" = Didymograptus pusillus
"Expansograptus holmi" = Didymograptus holmi Törnquist 1901 graptolite
"Expansograptus pusillus" = Didymograptus pusillus Tullberg 1880 graptolite
 Graptoloidea - Phyllograptidae
Tetragraptus reclinatus Elles and Wood 1902 graptolite