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Echinognathus is a
genus of eurypterid, an
extinct group of
aquatic arthropods. The type and only
species of
Echinognathus, E. clevelandi, is
known from...
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likely closely related, to the
genus Echinognathus. In 1934, Størmer
classified Megalograptus and
Echinognathus,
together with the
genera Mixopterus and...
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Megalograptidae Caster & Kjellesvig-Waering, 1955
Megalograptus Miller, 1874
Echinognathus Walcott, 1882
Pentecopterus Lamsdell et al., 2015
Paleontology portal...
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Echinognathus clevelandi...
- predators,
classified in the
family Megalograptidae (comprising the
genera Echinognathus,
Megalograptus and Pentecopterus), are
likely to
represent the first...
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Echinognathus clevelandi...
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Mixopterus Echinognathus...
- near the end of the 19th century.
Carcinosomatidae Cincta Chasmataspis Echinognathus Eocarcinosoma Megalograptus Timeline of
eurypterid research Caster,...
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Dunsopterus Waterston 1968 Jr.
synonym N/A N/A
Synonym of Hibbertopterus.
Echinognathus Walcott 1882
Valid Ordovician United
States Eocarcinosoma Caster &...
- 'Carcinosomidae', in 1934, to
contain the four
genera Carcinosoma, Mixopterus,
Echinognathus and Megalograptus. The
family was
amended by Erik N. Kjellesvig-Waering...
