Hill Cerro El Mogallón (Cambrian of Mexico)

Where: Mexico (28.9° N, 109.3° W)

• Paleocoordinates: 23.7° N, 136.0° W (Wright 2013)

• coordinate stated in text

• outcrop-level geographic resolution

When: Ptychagnostus atavus trilobite zone, D Member (El Mogallón Formation), Boomerangian (500.5 - 499.0 Ma)

• Drumian (stage is not accepted by PBDB)

Environment/lithology: offshore shelf; shale and mudstone

• carbonate-clastic platform, open-shelf environment
• thinly bedded gray mudstone interbedded with red shale

Size class: macrofossils

Primary reference: M. S. Beresi, J. P. Botting, J. J. Palafox and B. E. Buitron Sanchez. 2017. New reticulosan sponges from the middle Cambrian of Sonora, Mexico. Acta Palaeontologica Polonica 62(4):691-703 [W. Kiessling/M. Krause]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 200299: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 28.03.2019

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Lingulata
 Acrotretida - Acrotretidae
Linnarssonia sp., Linnarssonia ophirensis, Prototreta sp.
Linnarssonia sp. Walcott 1885
Prototreta sp. Bell 1941
 Lingulida - Obolidae
Lingulella sp.
Lingulella sp. Salter 1866
Artiopoda
 Corynexochida - Dolichometopidae
Bathyuriscus sp.
Bathyuriscus sp. Meek 1873 trilobite
 Agnostida - Eodiscidae
Pagetia resseri
Pagetia resseri Kobayashi 1943 artiopod
 Agnostida - Ptychagnostidae
Ptychagnostus sp., Ptychagnostus atavus, Onymagnostus ? hybridus
Ptychagnostus sp. Jaekel 1909 artiopod
Ptychagnostus atavus Tullberg 1880 artiopod
Onymagnostus ? hybridus Broegger 1878 artiopod
Hexactinellida
 Reticulosa - Hintzespongiidae
Ratcliffespongia arivechensis
Ratcliffespongia arivechensis Beresi et al. 2017 glass sponge
 Reticulosa - Protospongiidae
Kiwetinokia sp.
Kiwetinokia sp. Walcott 1920 glass sponge
 Reticulosa -
Valospongia sonorensis
Valospongia sonorensis Beresi et al. 2017 glass sponge