Lanna (Ordovician of Sweden)

Where: Sweden (59.2° N, 14.9° E: paleocoordinates 38.4° S, 11.4° W)

• coordinate estimated from map

When: Paroistodus proteus conodont zone, Lower Planilimbata Limestone Member (Latorp Formation), Billingen (474.8 - 471.1 Ma)

• member-level stratigraphic resolution

Environment/lithology: glauconitic, phosphatic, brown, green limestone

• Grey or brown limestone, o . S s m thick. The basal beds are rich in glauconite grains and lumps of phosphatized anthraconite . Three thin layers of greenish grey shale are found, containing the " Shumardia fauna" described by Wiman (1905)

Size classes: macrofossils, mesofossils

Primary reference: T. E. Tjernvik. 1956. On the Early Ordovician of Sweden stratigraphy and fauna. Bulletin of the Geological Institutions of the University of Uppsala 36(6):109-284 [A. Miller/P. Novack-Gottshall/A. Clement]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192718: authorized by Pete Wagner, entered by Pete Wagner on 17.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Artiopoda
 Agnostida - Metagnostidae
Geragnostus explanatus
Geragnostus explanatus Tjernvik 1956
Trilobita
 Phacopida - Diaphanometopidae
"Diaphanometopus lineatus" = Gyrometopus lineatus
"Diaphanometopus lineatus" = Gyrometopus lineatus Angelin 1854 trilobite
 Phacopida - Pliomeridae
"Pliomerops actinurus" = Hintzeia actinura
"Pliomerops actinurus" = Hintzeia actinura Dalman 1824 trilobite
 Trinucleida - Raphiophoridae
Ampyx cf. pater
Ampyx cf. pater trilobite
 Asaphida - Nileidae
Varvia breviceps, Nileus limbatus, Symphysurus angustatus
Varvia breviceps Angelin 1854 trilobite
abundant in the lower part of the zone
Nileus limbatus trilobite
Symphysurus angustatus Sars and Boeck 1838 trilobite
 Asaphida - Cyclopygidae
"Cyclopyge gallica" = Pricyclopyge gallica
"Cyclopyge gallica" = Pricyclopyge gallica Tjernvik 1956 trilobite
in one of the upper beds only
 Asaphida - Asaphidae
Niobe emarginula, Niobella bohlini, "Promegalaspides (Borogothus) stenorhachis" = Promegalaspides (Borogothus) stenorachis, Megalaspides nericiensis, "Plesiomegalaspis planilimbata" = Megistaspis (Paramegistaspis) planilimbata
Niobella bohlini Tjernvik 1956 trilobite
"Promegalaspides (Borogothus) stenorhachis" = Promegalaspides (Borogothus) stenorachis Angelin 1851 trilobite
Megalaspides nericiensis Wiman 1905 trilobite
"Plesiomegalaspis planilimbata" = Megistaspis (Paramegistaspis) planilimbata Angelin 1851 trilobite