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Hybodus
Agassiz 1837
|
Pronounced
|
High-BO-duss |
|
|
|
From
Bernissart (in Belgium) |
|
Classification
|
Elasmobranchi
Hybodontidae Owen 1846
Hybodus
basanus
Egerton, 1845
|
|
Stratigraphy
|
Wessex
and Vectis |
|
Lifestyle
|
This
shark would have eaten fish and scavenged floating carcasses. |
|
Locality
|
Between
Compton Grange and Hanover
Point. |
|
Description
of Material
|
Hybodus
is known from teeth and fin spines. The teeth are high
with a slender cusp and a circular cross-section. The
spines are quite long, with longitudinal striations and
two rose of triangular denticles along the posterior length.
The morphology of Hybodus teeth varies between
species, so may be more of a morphotype than an actual
genus
|
Simon
Clabby 2006
|
 |
| |
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 |
|
Hylaeobatis
Woodward, 1916
|
Pronounced
|
HI-lee-oh-BAT-iss |
|
|
|
From
Bernissart (in Belgium) |
|
Classification
|
Chondrichthyes
Myliobatidae Bonaparte 1838
Hylaeobatis
problematica Woodward, 1916
|
|
Stratigraphy
|
Wessex
Formation |
|
Lifestyle
|
This
shark would have eaten molluscs, using it's crushing teeth
to crush the shells. |
|
Locality
|
Unknown |
|
Description
of Material
|
Lonchidiid
with crushing-type dentition with weak heterodonty.
The teeth are transversely elongated, oval to rectangular
in occlusal view. The occlusal surface is ornamented
with reticulate folds, somewhat tumid but with no cusp
being differentiated. There is a labial protuberance
almost absent from all teeth; root massive with well-developed
foramina on lingual face.
|
Simon
Clabby 2008
|
|
| |
|
|
|
|
|
Lonchiodion
Estes, 1964
|
Pronounced
|
LON-chee-OH-dee-on |
|
|
|
From
Bernissart (in Belgium) |
|
Classification
|
Elasmobranchi
Lonchidiidae, Herman 1977
Lonchiodion
sp.
|
|
Stratigraphy
|
Vectis
Formation |
|
Lifestyle
|
This
shark would have eaten fish, floating material and anything
small enough for it to kill. |
|
Locality
|
Unknown |
|
Description
of Material
|
Lonchidiid
with crushing-type dentition with weak heterodonty.
The teeth are transversely elongated, oval to rectangular
in occlusal view. The occlusal surface is ornamented
with reticulate folds, somewhat tumid but with no cusp
being differentiated. There is a labial protuberance
almost absent from all teeth; root massive with well-developed
foramina on lingual face.
|
Simon
Clabby 2006
|
|
| |
|
|
|
|
|
Palaeoscyllium
Wagner,
1857, non Marck, 1863
|
Pronounced
|
Owe-ENN-ee-ah-SOO-kuss
|
|
|
|
Owen's
Crocodile |
|
Classification
|
Elasmobranchii
Orectolobiformes Applegate 1972
Palaeoscyllium
aff. formosum Wagner, 1857
|
|
Stratigraphy
|
Wessex
Formation |
|
Lifestyle
|
This
shark would have eaten fish, floating material and anything
small enough for it to kill. Unusually for this genus,
it lived in non-marine waters, with low salinities. |
|
Locality
|
Yaverland
point, near Sandown |
|
Description
of Material
|
Small
teeth showing moderate heterodonty. Single main cusp
is moderately high and erect or slightly angled to posterior.
Little or no crown shoulder at base of cusp and lateral
cusplets absent or incipient. Labial face flat and unornamented
in anterior teeth, with short and strong vertical ridges
in lateral teeth, never extending onto main cusp. Hemiaulacorhize
root low and V-shaped, with root lobes forming an angle
of 60-90 degrees. root lobes parallel sided and basal
face of root largely flat. Small foramina are very well
developed at junction of root lobes; foramina also present
along linguo-lateral side of root. Lingual extremity
of root sharply angled and with large foramina.
From
Underwood
and Ward 200
|
Simon
Clabby 2006
|
|
| |
|
|
|
|
|
|
Pronounced
|
VECK-tiss-ELL-ak-oss |
|
|
|
Vectis
shark |
|
Classification
|
Elasmobranchi
Lonchidiidae, Herman 1977
Vectiselachos
ornatus Woodward, 1916
|
|
Stratigraphy
|
Wessex
Formation |
|
Lifestyle
|
This
shark would have eaten molluscs, using it's crushing teeth
to crush the shells. |
|
Locality
|
Brook
bay |
|
Description
of Material
|
Lonchidiid
with pronounced crushing-type dentition; anterior teeth
bulky with well demarcated cusp and labial protuberance,
weakly ornamented, primarily with striations and rarely
with granulae; lateral teeth lower, more heavily ornamented,
always with granulae; labial protuberance in laterals
poorly developed or absent; root markedly smaller than
crown and comparably thin. |
Simon
Clabby 2006
|
|
| |
|
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|
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|
2006
