Cerro La Silla (Ordovician of Argentina)

Where: San Juan, Argentina (30.3° S, 68.6° W: paleocoordinates 36.9° S, 130.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: San Juan Formation, Arenigian (478.6 - 468.1 Ma)

• middle part of the formation

• group of beds-level stratigraphic resolution

Environment/lithology: lithified wackestone and lithified grainstone

• skeletal wackestone alternating with biolithoclastic grainstones

Size class: macrofossils

Primary reference: M. G. Carrera. 1996. Ordovician megamorinid demosponges from San Juan Formation, Precordillera, western Argentina. Geobios 29(6):643-650 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 119482: authorized by Wolfgang Kiessling, entered by Uta Merkel on 27.10.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Demospongiae
 Megalithistida - Nexospongiidae
Nexospongia sillaensis n. gen. n. sp.
Nexospongia sillaensis n. gen. n. sp. Carrera 1996 demosponge