Byrum trilobites (Ordovician of Sweden)

Where: Sweden (57.2° N, 17.0° E: paleocoordinates 38.4° S, 8.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Asaphus expansus trilobite zone, Holen Formation, Kunda (468.1 - 463.5 Ma)

• Age and stratigraphy based on Nordlund 1989 (GFF 111:64-94) and Struresson 1986 (GFF 108:331-348).

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

• non-glauconitic limestone

Size class: macrofossils

Collection methods: surface (in situ),

Primary reference: B. Bohlin. 1949. The Asaphus Limestone in northernmost Ă–land. Bulletin of the Geological Institution of the University of Uppsala 33:529-570 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 188213: authorized by Melanie Hopkins, entered by Melanie Hopkins on 25.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Corynexochida - Illaenidae
 Phacopida - Pliomeridae
 Asaphida - Asaphidae
"Megalaspis heros" = Megistaspis, Ptychopyge sp.
"Megalaspis heros" = Megistaspis trilobite
Ptychopyge sp. Angelin 1854 trilobite
 Lichida - Lichidae
"Lichas verrucosus" = Metopolichas verrucosus
"Lichas verrucosus" = Metopolichas verrucosus Eichwald 1842 trilobite
Craniata
 Craniida - Craniidae
Pseudocrania sp. M'Coy 1851