- in the Late Ordovician. The
Agnostida are
divided into two suborders —
Agnostina and Eodiscina —
which are then
subdivided into a
number of families. As...
- fossils.
Other groups show
secondary lost
facial sutures, such as all
Agnostina and some Phacopina.
Another common feature of the
Olenellina also suggests...
- (which may also be
called peronopsids)
comprise the
earliest family of the
Agnostina suborder.
Species of this
family occurred on all paleocontinents. The...
-
primitive suborder of the Agnostida, and the
Agnostina the more advanced. Some
scholars do not
consider the
Agnostina true trilobites, and
consequently rejected...
-
Agnostidae is a
family of
Agnostida trilobites. Like all
Agnostina, they were
eyeless and had only two
thoracic segments.
These trilobites inhabited benthic...
- the
Russian Federation (Siberia). They
uniquely differ from all
other Agnostina in
having the
frontal glabellar lobe
wider than the rear lobe. The Condylopygidae...
- same size (or isopygous) and outline. As in all
Agnostina,
Agnostus has two
thorax segments. When
Agnostina are enrolled, a tiny
opening between the cephalon...
-
Ptychagnostidae is
classified under the
superfamily Agnostoidea of the
suborder Agnostina,
order Agnostida. The
family was
first established by the ****anese paleontologist...
-
derived trilobites have lost
facial sutures again (some Eodiscina, all
Agnostina, and a few Phacopina), but all of
these are blind,
while all Olenellina...
-
Animalia Phylum:
Arthropoda class:
Trilobita Order:
Agnostida Suborder:
Agnostina Superfamily:
Agnostoidea Family:
Peronopsidae Genus:
Pentagnostus Lermontova...
