- Order: †Agnostida Salter, 1864
Families Suborder Agnostina Superfamily Agnostoidea Agnostidae Ammagnostidae Clavagnostidae Diplagnostidae Doryagnostidae...
- †Trilobita (?) Order: †Agnostida Suborder: †Agnostina Superfamily: †
Agnostoidea Family: †Agnostidae McCoy, 1849
Synonyms Micragnostidae Howell, 1935...
- of effacement,
establishing the
relationship of
Phalagnostus to
other Agnostoidea is difficult. The
Treatise lists Phalagnostus as
family unknown. P. bituberculata...
-
Geragnostus is a
genus of very
small agnostid trilobites whose fossils are
found Ordovician-aged
marine strata from Eurasia,
North America and Argentina...
- agnostids, and it is
undecided whether this
genus should be ****igned to the
Agnostoidea, the Condylopygoidea, or a new
monotypic superfamily. S.
similaris has...
-
distinguishes this
group from the Eodiscina. A
feature shared with all
Agnostoidea is that the
frontal lobe of the
central raised area of the
cephalon (or...
-
distinguishes this
group from the Eodiscina. Two
features shared with all
Agnostoidea are that the
basal glabellar lobes are
anteriorly expanded, and that...
-
Trinodus is a very
small to
small (about 1
centimetre or 0.39 inches)
blind trilobite, a well
known group of
extinct marine arthropods,
which lived during...
-
Ptychagnostus is a
genus of
trilobites in the
order Agnostida that
lived during the
Cambrian period.
Their remains are
rarely found in
empty tubes of the...
-
distinguishes this
group from the Eodiscina. A
feature shared with all
Agnostoidea is that the
frontal lobe of the
central raised area of the
cephalon (or...
