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Eurypterids,
often informally called sea scorpions, are a
group of
extinct arthropods that form the
order Eurypterida. The
earliest known eurypterids...
- are no
longer considered eurypterids. The list
currently includes 115
names out of
which 74 are
considered valid eurypterid genera.
There are approximately...
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formation was,
unlike the
typical living environments of
eurypterids (especially the
swimming eurypterids of the
suborder Eurypterina), a
freshwater environment...
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America and
Great Britain.
Carcinosomatid eurypterids had
unusual proportions and
features compared to
other eurypterids, with a
broad abdomen, thin and long...
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Until recently,
eurypterids were
thought to
belong to the
class Merostomata along with
order Xiphosura. It is now
believed that
eurypterids are a sister...
-
species of
first ever
eurypterid to be
scientifically described,
Eurypterus remipes, in 1825. Over 250
species of
eurypterids in 74
recognized valid...
- some of the
oldest known eurypterids, such as Brachyopterus, from the
Middle Ordovician as well as the
youngest known eurypterids, from the Late Permian...
- as part of the
pterygotid family of
eurypterids, to
which it
lends its name, a
group of
highly derived eurypterids of the
Silurian to
Devonian periods...
- tail
spike differentiate it from most
other eurypterids, but are
shared with
other carcinosomatid eurypterids. The
triangular carapace,
oddly positioned...
-
swimming eurypterids (such as
Pterygotus and Eurypterus)
which had been
common during earlier periods. Like all
other stylonurine eurypterids, Campylocephalus...
