Tagasi otsingusse
Cocks, 2005

Strophomenate Brachiopods from the late Ordovician Boda Limestone of Sweden: their systematics and implications for palaeogeography

Cocks, L. R. M.
DOI
DOI10.1017/S1477201905001616
Aasta2005
AjakiriJournal of Systematic Palaeontology
Köide30
Number3
Leheküljed243-282
Tüüpartikkel ajakirjas
Keelinglise
Id3567

Abstrakt

Brachiopods of the superfamilies Strophomenoidea, Plectambonitoidea and Chilidiopsioidea are revised and described from the late Ordovician (Middle Ashgill) carbonate mud mounds of the Boda Limestone of Sweden. The fauna is compared and contrasted with those from mud mounds of comparable age in England (the Keisley Limestone) and Ireland (the Kildare and Portrane Limestones). New strophomenoidean genera are Trondomena and Ungulomena (both Glyptomenidae), the latter within the new subfamily Ungulomeninae. A new subgenus is Leptaena (Ygdrasilomena) (Rafinesquinidae), and new strophomenoid species are Gunnarella magnifica, Holtedahlina suedica, Katastrophomena (Costistrophomena)? magna, Luhaia candelabra, Leptaena (Leptaena) bergstroemi, Leptaena (Ygdrasilomena) roomusoksi, Kiaeromena (Kiaeromena)? grandis, Trondomena bella, Ungulomena lindstroemi and Christiania dalarnensis; new plectambonitoidean species are Bimuria popovi, Leangella (Leangella) longae, Anoptambonites williamsi and Ptychoglyptus ingenuus. Ten more unnamed and probably new species and at least two more new genera are described under informal nomenclature (A to J). The Strophomenoidea, with at least 20 named and unnamed species in the Boda Limestone, are found to have been much more diverse and endemic than the Boda Plectambonitoidea and the Chilidiopsoidea: the latter two superfamilies include no definite endemic genera and those that occur are relatively cosmopolitan in the low latitudes in which the Baltica Terrane was situated in the late Ordovician. Some faunal links are established with the neighbouring terranes of Avalonia, Laurentia and Siberia, but, in contrast to the plectambonitoideans and chilidiopsoideans, the relative endemicity of the Boda Strophomenoidea is striking and that local radiation was probably caused by the mid-Ashgill Boda Warming Event.

Viimati muudetud: 17.12.2023
KIKNATARCSARVTÜ Loodusmuuseumi geokogudEesti Loodusmuuseumi geoloogia osakond
Leheküljel leiduvad materjalid on enamasti kasutamiseks CC BY-SA litsensi alusel, kui pole teisiti määratud.
Portaal on osaks teadustaristust ning infosüsteemist SARV, majutab TalTech.
Open Book ikooni autor Icons8.