Trimerocephalus is a genus of trilobites from the order Phacopida

Phacopida

Phacopida is an order of trilobite that lived from the Ordovician to the Devonian. It is made up of a morphologically diverse group of related suborders....

, family Phacopidae

Phacopidae

Phacopidae is a family of trilobites of the order Phacopida, including the following genera:*Acernaspis*Acuticryphops*Adastocephalum*Afrops*Ainasuella*Altaesajania*Ananaspis*Angulophacops*Arduennops...

. This genus is from the late Devonian

Devonian

The Devonian is a geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period, about 416.0 ± 2.8 Mya , to the beginning of the Carboniferous Period, about 359.2 ± 2.5 Mya...

 and can be found in Morocco

Morocco

Morocco , officially the Kingdom of Morocco , is a country located in North Africa. It has a population of more than 32 million and an area of 710,850 km², and also primarily administers the disputed region of the Western Sahara...

, Poland

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 and occasionally in other European countries. These trilobites look similar to Ductina

Ductina

Ductina is a genus of trilobites of the order Phacopida, family Phacopidae, from the Lower Devonian. These are usually small trilobites, rarely exceeding half an inch. They come from the Devonian time period and are found in Germany and China...

, but differ in that it is possible to distinguish where the eyes used to be on the cephalon, unlike in Ductina, where there is no apparent sign that the genus had eyes.

Some Known Species and Locations.

• Trimerocephalus lelievrei, Morocco.
• Trimerocephalus mastophthalmus, Poland, Germany, United Kingdom.
• Trimerocephalus interruptus, Poland (Late Famennian of "Kowala" Quarry)
• Trimerocephalus polonicus, Poland (Late Famennian of "Kadzielnia" Quarry)
• Trimerocephalus caecus, Germany.
• Trimerocephalus laevis, United Kingdom (example below. Pilton Beds, Late Famennian, North Devon : UK)