Holorhynchus association, Langoyen Fm. (Ordovician of Norway)

Where: Oslo-Asker Dist., Norway (59.9° N, 10.6° E: paleocoordinates 27.6° S, 8.9° W)

• coordinate based on political unit

When: Langoyen Formation, Hirnantian (445.2 - 443.4 Ma)

• "Late Ashgillian (Ord) (Hirnantian)"

Environment/lithology: offshore; siltstone

• "variable facies- silty mudstones. shallow shelf, prob. somewhat shoreward of Hirnantian assoc."

Size class: macrofossils

Primary reference: P. J. Brenchley and L. R. M. Cocks. 1982. Ecological associations in a regressive sequence: the latest Ordovician of the Oslo-Asker district, Norway. Palaeontology 25(4):783-815 [S. Finnegan/S. Finnegan/B. Kröger]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 438: authorized by Arnold Miller, entered by Mike Sommers on 08.12.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Brenchley and Cocks, 1982"
unclassified
  -
Heliotidae indet.
heliolitid
Steptelasmidae indet.
streptelasmid
Strophomenata
 Strophomenida - Sowerbyellidae
Eoplectodonta sp. Kozlowski 1929
 Strophomenida - Aegiromenidae
Sericoidea sp. Lindström 1953
 Strophomenida - Leptestiidae
Leangella sp. Opik 1933
 Strophomenida - Rafinesquinidae
Leptaena sp. Dalman 1828
 Strophomenida - Strophomenidae
Rhynchonellata
 Pentamerida -
Pentamerida indet. Schuchert and Cooper 1931
pentamerid
 Pentamerida - Virgianidae
Holorhynchus sp. Kiaer 1902
 Atrypida - Atrypinidae
Eospirigerina sp. Schuchert and Cooper 1930
 Orthida - Dalmanellidae
Paucicrura sp. Cooper 1956
Onniella sp. Bancroft 1928
 Orthida - Productorthidae
Nicolella sp. Reed 1917
 Orthida - Hesperorthidae
Hesperorthis sp. Schuchert and Cooper 1931
Dolerorthis sp. Schuchert and Cooper 1931
Bivalvia
 Cardiiformii -
"Modiomorphoida indet." = Modiomorphida
"Modiomorphoida indet." = Modiomorphida Newell 1969 clam
modiolopsid
 Nuculoida -
"Nuculoida indet." = Nuculida
"Nuculoida indet." = Nuculida Dall 1889 clam
? nuculid bivalve
 Nuculida - Praenuculidae
Similodonta sp. Soot-Ryen 1964 clam
Gastropoda
 Archaeogastropoda -
Archaeogastropoda indet. Thiele 1925 snail
gastropods
 Pleurotomariida -
"Pleurotomariacea indet." = Pleurotomarioidea
"Pleurotomariacea indet." = Pleurotomarioidea Swainson 1840 snail
pleurotomariacean
Cephalopoda
 Tarphycerida - Trocholitidae
Discoceras sp. Barrande 1867
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
3 types: hemisphaeroidal, thin stick, and encrusting net
Stenolaemata
 Trepostomata - Halloporidae
? Hallopora sp. Bassler 1911
originally entered as "? Hallopora sp."
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
rare crinoid ossicles
Chlorophyceae
  - Receptaculitidae
Receptaculites sp. Defrance 1827