Rambla de Valdemiedes, near Murero, (Cambrian of Spain)

Where: Spain (41.2° N, 1.5° W: paleocoordinates 55.5° S, 111.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Murero Formation, St Davids (509.0 - 497.0 Ma)

• The Murero Formation extends along the Middle Cambrian Caesaraugustian Stage

Environment/lithology: offshore; gray, green shale and fine-grained sandstone

• The paleoenvironmental reconstruction (Gozalo,

•1995) suggests that the mud-dominated deposition took

•place during a transgressive pulse that produced deep-sublittoral

•or maybe circalittoral environmental conditions.

•These depositional conditions would have produced an

•unprotected environment, a fact also inferred from the

•presence of oligomeric trilobites (e.g. Agnostidae), considered

•as pelagic organisms typical of open waters.

• It consists mainly of green or blue-grey shales and marly shales, with

•some interbedded fine sandstone levels. A few carbonate

•nodule-bearing levels also occur.

Size class: macrofossils

Primary reference: D. Garcia-Bellido Capdevila. 2003. The demosponge Leptomitus cf. L. lineatus, first occurrence from the Middle Cambrian of Spain (Murero Formation, Western Iberian Chain). Geologica Acta 1(1):113-119 [A. McGowan/A. McGowan/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 55501: authorized by Alistair McGowan, entered by Alistair McGowan on 28.10.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

 Protomonaxonida - Leptomitidae
Leptomitus cf. lineatus Walcott 1920 demosponge