Islares (Cretaceous of Spain)

Where: Cantabria, Spain (43.4° N, 3.3° W: paleocoordinates 31.8° N, 4.8° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Miono Formation, Early/Lower Albian (112.0 - 109.0 Ma)

• 11 m thick

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified marl and lithified limestone

• slope setting
• sponges mostly from units 2 and 4: silty marl and marly limestone with sponge biostromes, in unit 4 intercalated with microsolenid coral horizons

Size class: macrofossils

Primary reference: I. Rosales, D. Mehl, P. A. Fernandez-Mendiola and J. Garcia-Mondejar. 1995. An unusual poriferan community in the Albian of Islares (north Spain): palaeoenvironmental and tectonic implications. Palaeogeography, Palaeoclimatology, Palaeoecology 119:47-61 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 110529: authorized by Wolfgang Kiessling, entered by Uta Merkel on 09.06.2011, edited by Marko Manojlovic

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Sellithyrididae
Tropeothyris islarensis n. sp. Middlemiss 1984
Hexactinellida
 Hexactinosa - Cribrospongiidae
Cribrospongia sp. d'Orbigny 1849 glass sponge
Demospongiae
 Tetralithistida - Chenendoporidae
Chenendopora fungiformis Lamouroux 1821 demosponge
 Tetralithistida - Phymaraphiniidae
Phymaraphinia infundibuliformis Schrammen 1901 demosponge
 Tetralithistida - Siphoniidae
Aulaxinia ventricosa Schrammen 1910 demosponge
Aulaxinia sulcifera Roemer 1864 demosponge
 Tetralithistida - Corallistidae
Pachinion scriptum Roemer 1864 demosponge
Procorallistes polymorphus Schrammen 1901 demosponge
 Megalithistida - Pleromatidae
Doryderma (Brochodora) roemeri Hinde 1884 demosponge
Doryderma (Brochodora) ramusculus Schrammen 1910 demosponge
Pachypoterion auritum Schrammen 1910 demosponge