| Aulacopleura Temporal range:
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|---|---|
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| Aulacopleura koninckii, Kosov u Berouna, Czech Republic | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | †Trilobita |
| Order: | †Proetida |
| Family: | †Aulacopleuridae |
| Genus: | †Aulacopleura Hawle & Corda, 1847 |
| Type species | |
| †Arethusa koninckii Barrande, 1846
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| Species | |
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| Synonyms | |
|
Arethusa Barrande, 1846 non De Montfort, 1808, Arethusina Barrande, 1852 | |
Aulacopleura is a genus of proetid trilobite[1] that lived from the Middle Ordovician to the Middle Devonian. Some authors may classify this group as subgenus Otarion (Aulacopleura).[2] The cephalon is semicircular or semielliptical, with border and preglabellar field. The glabella is short, with or without defined eye ridges connecting it with eyes of variable size. Spines at the rear outer corners of the cephalon (or genal spines) are present, typically reaching back to the 2nd to 4th thorax segment. The 'palate' (or hypostome) is not connected to the dorsal shield of the cephalon (or natant). The cephalon is pitted, or has small tubercles. The thorax has up to 22 segments. The pleural ends are usually rounded. The pygidium is small (micropygous), with an even margin. A. koninckii had a modern type of compound eye.[3]
- ^ Sam M. Gon III. "Trilobite info". www.trilobites.info.
- ^ Fossilworks: †Aulacopleura Hawle and Corda 1847 (trilobite)
- ^ Schoenemann, Brigitte; Clarkson, Euan N. K. (2020-08-13). "Insights into a 429-million-year-old compound eye". Scientific Reports. 10 (1). Springer Science and Business Media LLC: 12029. Bibcode:2020NatSR..1012029S. doi:10.1038/s41598-020-69219-0. ISSN 2045-2322. PMC 7426942. PMID 32792496.