Hälludden section trilobites (Ordovician of Sweden)

Where: Sweden (57.4° N, 17.0° E: paleocoordinates 38.2° S, 8.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Asaphus raniceps trilobite zone, Oland C Formation, Kunda (469.2 - 464.3 Ma)

• Specimens sampled from "f" bed of Bohlin 1949. Age and stratigraphy based on Nordlund 1989 (GFF 111:64-94) and Struresson 1986 (GFF 108:331-348). PJW: Was Holen Limestone based on prior references. However, raniceps-aged rock on Öland now is in the informal Öland C formation. (Holen is slightly older, too.)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

• fairly loosely-joined small lenses of limestone, at certain levels interrupted by more distinct bedded planes marked by a film of limonite

Size class: macrofossils

Collected in 1939, 1941

Primary reference: B. Bohlin. 1949. The Asaphus Limestone in northernmost Öland. 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 188210: authorized by Melanie Hopkins, entered by Melanie Hopkins on 25.08.2017, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• PJW: This is almost certainly the same as collection 167625.
Artiopoda
 Agnostida - Metagnostidae
Trilobita
 Corynexochida - Illaenidae
 Phacopida - Pterygometopidae
Pterygometopus sclerops Dalman 1827 trilobite
 Phacopida - Encrinuridae
Cybele bellatula Dalman 1827 trilobite
 Phacopida - Pliomeridae
"Pliomera fischeri" = Pliomera fisheri
"Pliomera fischeri" = Pliomera fisheri Eichwald 1825 trilobite
 Phacopida - Cheiruridae
"Ceraurus ingricus" = Laneites ingrica Schmidt 1881 trilobite
? Cyrtometopus sp. Angelin 1854 trilobite
Cyrtometopus clavifrons Dalman 1827 trilobite
 Trinucleida - Raphiophoridae
Ampyx nasutus Dalman 1827 trilobite
 Asaphida - Asaphidae
Asaphus raniceps Dalman 1827 trilobite
"Megalaspis heros" = Megistaspis trilobite
"Megalaspis extenuata" = Megistaspis (Megistaspidella) extenuata Wahlenberg 1821 trilobite
Ptychopyge sp. Angelin 1854 trilobite
 Asaphida - Remopleurididae
Remopleurides sp. Portlock 1843 trilobite
 Lichida - Lichidae
"Lichas celorrhin" = Metopolichas celorrhin, "Lichas verrucosus" = Metopolichas verrucosus
"Lichas celorrhin" = Metopolichas celorrhin Angelin 1854 trilobite
"Lichas verrucosus" = Metopolichas verrucosus Eichwald 1842 trilobite
 Odontopleurida - Odontopleuridae
"Ceratocephala solis" = Boedaspis solis
"Ceratocephala solis" = Boedaspis solis Oepik 1925 trilobite