Potimalal, Mendoza, Argentina (Jurassic of Argentina)

Also known as Reef 570

Where: Argentina (36.0° S, 70.0° W: paleocoordinates 33.2° S, 32.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: La Manga Formation (Lotena Group), Middle Oxfordian (161.2 - 155.7 Ma)

• Plicatilis Zones

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified framestone

• Siliceous sponge bioherms (framestone) with hexactinellids and lithstids. Moderately bored.

Size classes: macrofossils, mesofossils

Collection methods: mechanical, peel or thin section,

• 74% Hexactinosa, 17% Lyssacinosa, 10% Lithistida

Primary reference: M. S. Beresi. 2003. Oxfordian sponge association from the Neuquen basin, Mendoza, west central Argentina. Journal of South American Earth Sciences 16(3):105-112 [W. Kiessling/W. Kiessling/W. Kiessling]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45546: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 03.11.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Only hexactinellids studied in detail
Hexactinellida
 Hexactinosa - Aulocalycidae
Polygonatium sphaeroides Schrammen 1937 glass sponge
 Hexactinosa - Cribrospongiidae
Cribrospongia sp. d'Orbigny 1849 glass sponge
Cribrospongia reticulata Goldfuss 1826 glass sponge
 Hexactinosa - Euretidae
Linonema calyx Schrammen 1937 glass sponge
Ordinatus sp. Laubenfels 1955 glass sponge
 Innaecoeliida - Craticulariidae
Laocoetis sp. Pomel 1872 glass sponge
Laocoetis procumbens Goldfuss 1826 glass sponge
Laocoetis paradoxa Münster 1833 glass sponge
"Laocoetis parallela" = Craticularia parallela Goldfuss 1826 glass sponge
Demospongiae
 Lithistida -
Lithistida indet. demosponge
10% of all specimens
Polychaeta
 Serpulimorpha -
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805