Boutersem Sand (sandy facies), Borgloon Fm (Oligocene of Belgium)

Where: Belgium (51.0° N, 4.5° E: paleocoordinates 50.3° N, 0.8° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Boutersem Sand Member (Borgloon Formation), Rupelian (33.9 - 28.1 Ma)

• STRATIGRAPHIC RELATIONS: From the Boutersem Sand Mbr of the Borgloon Fm, which overlies the Zelzate Fm, and is overlain by the Bilzen Fm. AGE: Rupelian; justification not provided. STRATIGRAPHIC POSITION: Composite list for the member in the local area.

• member-level stratigraphic resolution

Environment/lithology: coastal; unlithified sandstone

• ENVIRONMENT: Shallow siliciclastic fauna.
• SPECIFIC LITHOLOGY: Sandstone. LITHIFICATION: Unlithified, on the basis of figured specimens.

Size classes: macrofossils, mesofossils

Collected by Marquet et al

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

• COLLECTORS: Marquet, Karnekamp, Lenaerts, and Smith, in addition to historic collections: REPOSITORY: Institut Royal des Sciences naturelles de Belgique (IRSNB), and Nationaal Natuurhistorich Murseum Naturalis (NNM).

Primary reference: R. Marquet, J. Lenaerts, C. Karnekamp and R. Smith. 2008. The molluscan fauna of the Borgloon Formation in Belgium (Rupelian, Early Oligocene). Palaeontos 12:1-99 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 111373: authorized by Austin Hendy, entered by Austin Hendy on 23.06.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for mollusca. NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution identifications.
Bivalvia
 Mytilida - Mytilidae
Modiolula pygmaea Philippi 1843 mussel
Mytilus sp. Linnaeus 1758 mussel
 Arcida - Glycymerididae
Glycymerididae indet. Newton 1922 clam
 Ostreida - Ostreidae
Crassostrea cyathula Lamarck 1806 oyster
 Lucinida - Lucinidae
Callucina thierensi Hébert 1849 clam
Pegophysema omaliusi Deshayes 1858 clam
 Solenida - Pharidae
 Cardiida - Corbiculidae
Polymesoda subarata Bronn 1837 clam
SUBSPECIES: Polymesoda subarata convexa
 Cardiida - Psammobiidae
"Gobraeus brabantinus" = Gari (Gobraeus)
"Gobraeus brabantinus" = Gari (Gobraeus) clam
 Cardiida - Cardiidae
Parvicardium vincenti Cossmann 1891 cockle
 Pholadida - Corbulidae
"Lentidium nitidum" = Lentidium (Ajanssenium) nitidum Sowerby 1822 clam
Gastropoda
 Neritoidea - Neritidae
 Cerithioidea - Thiaridae
 Cerithioidea - Potamididae
Mesohalina margaritaceus Brocchi 1814 horn snail
SUBSPECIES: Mesohalina margaritaceus labyrinthus
Potamides lamarkii horn snail
"Ptychopotamides thenensis" = Potamides (Ptychopotamides) horn snail
 Cerithioidea - Cerithiidae
 Cerithioidea - Batillariidae
Granulolabium plicatum Bruguiére 1792 snail
SUBSPECIES: Granulolabium plicatum moniliferum
 Sorbeoconcha - Cerithiopsidae
 Sorbeoconcha - Hydrobiidae
 Sorbeoconcha - Stenothyridae
 Sorbeoconcha - Truncatellidae
 Heterostropha - Murchisonellidae
 Heterostropha - Planorbidae
 Heterostropha - Lymnaeidae
 Opisthobranchia - Retusidae
Cylichnina coelata Deshayes 1862 snail