Plate 33: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossil: 1a to 1c: Burrow of which the wall is constituted by the cementation of numerous coprolites. 1a:
Lateral view of the burrow. 1b: Detail of a part of its wall. 1c: Detail of the surface of some coprolites. S.E.M.
photographs Julien Cillis (I.R.S.N.B., Brussels, Belgium). See comments: p.: 117.
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Plate 34: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils: 1 and 2: 1a and 1b: A spiral part of the mould of faeces supposed to be the beginning part of one
teleostean coprolite. Height: 4.1 mm. 2a and 2b: Height: 3.8 mm. Large part of the mould of chaplet-like faeces
of a small teleostean fish. S.E.M. photographs Julien Cillis (I.R.S.N.B., Brussels, Belgium). See comments: p.:
118.
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Plate 35: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossil: 1a and 1b: Lateral and upper oblique views of faeces containing only glossy very regular subcylindrical and segmented elements of 200 to 350 microns of maximal length, with a diameter of circa 80
microns. 1c: Detail showing the difference existing between the wall and the filling of these elements. S.E.M.
photographs Julien Cillis (I.R.S.N.B., Brussels, Belgium). See comments: p.: 118.
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Plate 36: Ichnofossil 11: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
1a: Extern lateral view of the fossilised contents of the posterior part of the penultimate spiral of the shell of one
species of the Family Naticidae (Gastropoda, Mollusca). 1b: Magnification of the central part of the photo
above. S.E.M. photographs Julien Cillis (I.R.S.N.B., Brussels, Belgium). See comments: p.: 119.
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Plate 37: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossil: 1a to 1c: 1a: Aggregate of small phosphate coprolites supposed to be of crustacean origin. 1b:
Magni-fication of the central part of the same aggregate. 1c: Magnification of one part of the photo above.
S.E.M. photographs Julien Cillis (I.R.S.N.B., Brussels, Belgium). See comments: p.: 119.
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Plate 38: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossil: 1a: Part of a group of coprolites liberated of its natural envelope. Magnification: x 1.5. 1b:
Electronic magnification of the central part of this group. 1c: Detail of the surface of one scratched coprolite.
S.E.M. photographs Julien Cillis (I.R.S.N.B., Brussels, Belgium). See comments: p.: 120.
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Plate 39: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils: 1a and 1b: Intern and extern views of the mould of the left valve of a tellinid bivalve (Mollusca)
completely filled with scattered faeces. 2a and 2b: Two different views of the burrow of a couple of harpactoscyllionid Stomatopoda. Photographs Jacques Herman. Private Collections. See comments: p.: 120.
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Plate 40: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils: 1 and 2: 1a Boring organism, parasite of one dorsal valve of a Pycnodonte callifera. 1b: Detail of
the same colony. Magnification x 2. 2a: One spiral-shaped burrow of an undetermined organism. 2b: Detail of
the same colony. Magnification x 2. S.E.M. photographs Julien Cillis (I.R.S.N.B., Brussels, Belgium). See
comments: p.: 120.
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Plate 41: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
1 to 5: Ichnofossils: 1: Mould of the stomach of a small unknown predator. The remains of six millimetre-sized
vertebrae of small teleostean fishes are distinguishable. 2: Phosphatised content of the small intestine (coelon) of
a small unknown predator. 3 and 4: Faeces of undetermined animals. Natural size. Photographs J. Herman.
Private Collections. See comments: p.: 121.
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Plate 42: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils: 1: Elongated rectilinear concretion. 2: Another elongated rectilinear concretion presenting a
callosity. 3: Elongated rectilinear concretion showing its content. 4 to 6: Moulds of Neoselachii stomachs
presenting their contents. 7a to 7j: Selected phosphate burrows of small Annelida with their natural sediment
covering. Photographs Jacques Herman. Private Collections. See comments: p.: 122.
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Plate 43: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils: 1a to 1c: Three side views of one enigmatic elongated siderite concretion of 15.5 cm of maximal
length. 2a and 2b: Lateral and upper views of another enigmatic siderite concretion of 3.2 cm of maximal
diameter. Photographs Jacques Herman. Private Collections. See comments: p.: 123.
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Plate 44: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
1 to 3: Ichnofossils: 1a and 1b: Strange siderite concretion, possible mould of one burrow partly filled with
stomatopod crustacean remains. 2: Elongated cylindrical siderite concretion with a wall constituted by very fine
silt grains. This is one of the rare discovered concretions which present a lateral aperture. 3: Another tubular
siderite concretion of which the wall is constituted by the same selected very fine silt grains. Common linear
magnification: x 1.5. Photographs Jacques Herman. Private Collections. See comments: p.: 123.
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Plate 45: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 434
Oligocene: Sint Niklaas Phosphorite Bed
1 to 10: Ichnofossils: 1a to 1b: Massive siderite concretion completely filled with silt grains. 2 to 10: Various
moulds of diverse kinds of normal and abnormal burrows, more or less filled with kaolinite powder. Their
intern part is always constituted by phosphates. Photographs Jacques Herman. Private Collections. See
comments: p.: 124.
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Plate 46: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 434
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils: 1 to 3: natural size: 1a to 1c: Different views of the emerging part of one cerianthid burrow having
adsorbed three neoselachian vertebrae. 2a and 2b: Enigmatic bulb-like siderite concretion. 3: Remains of one
large neoselachian vertebra. Photographs Jacques Herman. Private Collections. See comments: p.: 124.
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Plate 47: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils: 1a: Siderite mould of the burrow of one small gobiid teleostean fish. 1b to 1f: Diverse soft
kaolinite pebbles showing some sand and glaucony cores and on some of them small teleostean vertebrae (1e
and 1f) on their periphery. 1g: Kaolinite pebble completely enfolded by silt grains. Photographs Jacques
Herman. Private Collections. See comments: p.: 125.
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Plate 48: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils: 1 to 3: Siderite concretions with neoselachian tooth. 1a: (circa natural size) and 1b:
(magnification): Upper anterior tooth of one undetermined Heptranchias adhering on the wall of a gobiid
teleostean fish. 2: One tooth Synodontaspis acutissima, on a concretised part of the dentition of its owner. 3:
Lower anterior tooth of Carcharocles angustidens. Private Collections. See comments p.: 125.
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Plate 49: BELSELE: S.V.K. Clay Pit 4: B.G.S. Archives: 43 W 394
Oligocene: Sint Niklaas Phosphorite Bed
Ichnofossils:1a and 1b: Elongated and spiral-shaped faeces of a teleostean fish presenting complete Bacteria
filamentosae and other ones sporulating (1c). 2a to 2c: 2a: Mollusca: Part of a spiral-shaped tube of a
Petaloconchus (Gastropoda). Magnification: x 10. 2b and 2c: Magnifications: x 70. S.E.M. photographs
Julien Cillis (I.R.S.N.B., Brussels, Belgium). See comments: p.: 126.
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