PBDB Collection

Mamers Calcaires Maine and Normandy (Jurassic of France)

Where: France (48.3° N, 0.4° E: paleocoordinates 38.1° N, 10.8° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Retrocostatum Zone zone, Calcaires de Mamers Member, Middle Bathonian (167.7 - 164.7 Ma)

• The 'Calcaires the Mamers' is the base of the Retrocostatum Zone, it is overlain by the 'Caillasse des Baronnieres', the summit of the zone.

• member-level stratigraphic resolution

Environment/lithology: coastal; grainstone

• flora deposited on skeletal sand in low undulating tracts, sheltered from the open sea and isolated from continental alluvia. Coastal flora, not saline=stressed.

• shoreface calcarenite (...) with trough and cross stratification typical in the lower part, and gradually changes into flat bedding upwards. Terrestrial plants are mainly found in plant debris-rich lenses.

Size class: macrofossils

Preservation: mold/impression, original carbon

Collection methods: bulk, mechanical,

Primary reference: M. Philippe, F. Thevenard, G. Barale, S. Ferry, and G. Guignard. 1998. Middle Bathonian floras and phytocoenoses of France. Palaeogeography, Palaeoclimatology, Palaeoecology 143:135-158 [C. Looy/F. Verbruggen/F. Verbruggen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 31318: authorized by Cindy Looy, entered by Frederike Verbruggen on 07.05.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

• Material mostly studied by others, here reviewed and grouped.

•

•There are no palynological data available from Mamers. The palynological data found in Champlitte (other collection with this reference) by Médus and Mojon (1996) is thought to be a good approximation.

•

•The megaflora data is partly derived from Lignier (1911) and partly is described by Philippe et al. (1998)

Show authors, comments, and common names

unclassified
-	? Pterphyllum sp. ? Pterphyllum sp. part of megaflora (described by Lignier (1911))
Polypodiopsida
Gleicheniales - Polypodiidae	Phlebopteris sp. Phlebopteris sp. Brongniart 1836 part of megaflora (described by Philippe et al.)
Equisetales - Equisetidae	Equisetum mamertinus, Equisetum sarthensis Equisetum mamertinus horsetail part of megaflora (described by Lignier (1911)) Equisetum sarthensis horsetail part of megaflora (described by Lignier (1911))

Bennettitales -	Otozamites bucklandii, Otozamites lagotis, Otozamites major, Otozamites marginatus, Otozamites pterophylliodes, Otozamites rechini, Otozamites reglei, Otozamites brevifolius, Zamites moreaui, Zamites approximatus, Zamites confusus Otozamites bucklandii part of megaflora (described by Lignier (1911)) Otozamites lagotis part of megaflora (described by Lignier (1911)) Otozamites major part of megaflora (described by Lignier (1911)) Otozamites marginatus part of megaflora (described by Lignier (1911)) Otozamites pterophylliodes part of megaflora (described by Lignier (1911)) Otozamites rechini part of megaflora (described by Lignier (1911)) Otozamites reglei part of megaflora (described by Lignier (1911)) Otozamites brevifolius Braun 1843 part of megaflora (described by Lignier (1911)) Zamites moreaui part of megaflora (described by Lignier (1911)) Zamites approximatus part of megaflora (described by Lignier (1911)) Zamites confusus part of megaflora (described by Lignier (1911))
Coniferales - Brachyphyllaceae	Brachyoxylon sp. Brachyoxylon sp. Hollick and Jeffrey 1909 Part of megaflora (described by Philippe et al.)
Cycadopsida
Cycadales - Cycadaceae	Sphenozamites brongniartii Sphenozamites brongniartii cycads part of megaflora (described by Lignier (1911))
Cycadeoideopsida
Cycadeoideales -	Conites pontisgirardi Conites pontisgirardi part of megaflora (described by Lignier (1911))
Equisetopsida
Pinidae - Pinidae	Pagiophyllum sp., Brachyphyllum desnoyersii, Brachyphyllum sp. Pagiophyllum sp. Heer 1881 part of megaflora (described by Lignier (1911)) Brachyphyllum desnoyersii part of megaflora (described by Lignier (1911)) Brachyphyllum sp. Brongniart 1828 part of megaflora (described by Lignier (1911))
Gymnospermopsida
Corystospermales - Corystospermaceae	Cycadopteris moretiana Cycadopteris moretiana part of megaflora (described by Philippe et al.)
Cycadites
-	Cycadites delessei Cycadites delessei part of megaflora (described by Lignier (1911))