- The
Phacopina comprise a
suborder of the
trilobite order Phacopida.
Species belonging to the
Phacopina lived from the
Lower Ordovician (Tremadocian) through...
-
expanded glabella,
short or
absent preglabellar area, and
schizochroal (
Phacopina) or
holochroal (Cheirurina and Calymenina) eyes.
Schizochroal eyes are...
-
groups show
secondary lost
facial sutures, such as all
Agnostina and some
Phacopina.
Another common feature of the
Olenellina also
suggests this suborder...
-
development of Dalmanitina, and the
evolution of
facial suture fusion in
Phacopina". Paleobiology. 44 (4): 638–659. Bibcode:2018Pbio...44..638D. doi:10.1017/pab...
- have lost
facial sutures again (some Eodiscina, all Agnostina, and a few
Phacopina), but all of
these are blind,
while all
Olenellina have eyes. The suborder...
- the
subclass Librostoma.
Unlike the
trilobites of the
phacopid suborder Phacopina,
whose eyes are schizochroal, the
proetids have the more
common holochroal...
- Kingdom:
Animalia Phylum:
Arthropoda class: †Trilobita Order: †Phacopida Suborder: †
Phacopina Superfamily: †Phacopoidea
Families Phacopidae Pterygometopidae...
- punctuatus, O.
sicaeformis Paciphacops waisfeldae Palaeoneilo unionoides Phacopina (
Phacopina)
chojnacotensis Sinacanthus boliviensis Turinia gondwana Andinacaste...
-
Acastidae is a
family of
trilobites in the
order Phacopida,
suborder Phacopina,
superfamily Acastoidea,
containing the
following genera:
Wikimedia Commons...
- and
earliest Upper Devonian of
Morocco and the USA. Like in all
sighted Phacopina, the eyes of
Eldredgeops are
composed of very
large (0.5mm in Eldredgeops...
