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Harpetida is one of the
eleven orders of the
extinct arthropod class Trilobita. The
first harpetid trilobites appear in the
Upper Cambrian, and the last...
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survivors account for all post-Ordovician
trilobite groups except the
Harpetida.
Silurian and
Devonian trilobite ****emblages are
superficially similar...
- Proetida,
Harpetida, and
possibly Phacopida.
These are now
known as the "Librostome Orders".
Trilobites of the
orders Proetida,
Harpetida, and of the...
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hamarlaghdadensis Sp. nov
Valid Crônier et al.
Devonian (Emsian) Morocco A
member of
Harpetida belonging to the
family Harpetidae.
Subsequently transferred to the genus...
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Lioharpes is a
genus of
trilobites in the
order Harpetida. The
genus Eskoharpes possibly evolved from it. It is
synonymous with Fritchapsis. From the...
- †Olenellina
Order †Asaphida
Order †Aulacopleurida
Order †Corynexochida
Order †
Harpetida Order †Redlichiida
Order †Lichida
Order †Phacopida
Order †Proetida Order...
- niches. The
lateral fringe of the
cephalon is
greatly exaggerated in the
Harpetida, in
other species a
bulge in the pre-glabellar area is
preserved that...
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Orders Agnostida Asaphida Corynexochida Harpetida Redlichiida Lichida Phacopida Proetida Ptychopariida Genera List of trilobites...
- Traditionally, four
orders are
placed in the librostoma; they are the: Asaphida,
Harpetida, Proetida, and Ptychopariida; however, two
primitive Phacopids (Pharostomina...
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Orders Agnostida Asaphida Corynexochida Harpetida Redlichiida Lichida Phacopida Proetida Ptychopariida Genera List of trilobites...
