Gara Sbaa laminites (Cretaceous of Morocco)

Also known as Gara es Sba, Gara Sbâa

Where: Er Rachida, Morocco (30.5° N, 4.8° W: paleocoordinates 17.8° N, 4.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Gara Sbaa Member (Akrabou Formation), Late/Upper Cenomanian (99.6 - 93.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified dolomite

• "The Gara Sbaa fossil locality represents a shallow marine plattenkalk Konservat Lagerstätte deposited during the latest Cenomanian marine transgression, perhaps under the influence of widespread oceanic anoxia. Its fossil assemblage is dominated by marine fishes with rarer input from nearby terrestrial sources."
• The fossil-bearing parts of the Gara Sbaa laminites are restricted to a fewhorizons within the finely laminated dolomitised limestone with laminae of just 1e2 mm in thickness. In the middle to upper part of the unit the laminae are planar with few interruptions, but toward the base some bedding planes exhibit ripple marks with wave lengths of w50 mm

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression

Collected in 2008

Collection methods: surface (float), surface (in situ),

• "The preliminary report presented here describes a newly recognised fossil Konservat Lagerstätte that was explored with personnel from University College Dublin, Casablanca University and the University of Portsmouth during November and December 2008"

Primary reference: D. M. Martill, N. Ibrahim, P. M. Brito, L. Baider, S. Zhouri, R. Loveridge, D. Naish and R. Hing. 2011. A new Plattenkalk Konservat Lagerstätte in the Upper Cretaceous of Gara Sbaa, south-eastern Morocco. Cretaceous Research 32:433-446 [M. Clapham/J. Karr]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 120457: authorized by Matthew Clapham, entered by Jered Karr on 12.11.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hymenoptera - Chrysididae
Chrysididae indet. Latreille 1802 cuckoo wasp
Malacostraca
 Isopoda -
Isopoda indet. Latreille 1817 isopod
 Decapoda - Marocarcinidae
cf. Marocarcinus pasinii Guinot et al. 2008 crab
Actinopteri
 Teleostei - Aspidorhynchidae
Belonostomus sp. Agassiz 1843
 Acanthomorphata -
"Acanthomorpha indet." = Acanthomorphata
"Acanthomorpha indet." = Acanthomorphata Rosen 1973
 Aulopiformes - Eurypholidae
Saurorhamphus sp. Heckel 1850
 Alepisauriformes - Dercetidae
Rhynchodercetis sp. Arambourg 1943
 Clupeiformes - Clupeoidei
aff. Lusitanichthys sp. Gavet 1980 herring
 Ellimmichthyiformes - Ellimmichthyidae
Diplomystus sp. Cope 1877
aff. Ellimmichthys sp. Jordan and Gilbert 1919
 Ichthyodectiformes - Cladocyclidae
Cladocyclus sp. Agassiz 1843
new species
 Pycnodontiformes - Pycnodontidae
Pycnodus sp. Agassiz 1835
new species
 Semionotiformes - Macrosemiidae
Agoultichthys chattertoni Murray and Wilson 2009
Osteichthyes
 Tetrapoda -
Tetrapoda indet. Goodrich 1930 tetrapod
This specimen was sold to a fossil dealer and its present whereabouts is not known. The specimen appears to represent an unidentified lizard
unclassified
  -
Pteridophyta indet. Haeckel 1875