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Details van artikel 133 van 206 gevonden artikelen
| Titel: |
Oligocene and Miocene Bolivinellidae (Foraminiferida) from New Zealand |
| Auteur: |
Hayward, Bruce W. |
| Verschenen in: |
Alcheringa |
| Paginering: | Jaargang 6 (1982) nr. 1 pagina's 43-55 |
| Jaar: |
1982 |
| Inhoud: |
Two genera and nine species of Bolivinellidae occur in the New Zealand fossil record. Bolivinellids live today in low numbers in sandy sediments at inner shelf depths (0 to 60 m) in tropical to warm temperate seas and apparently also did in the past. The earliest New Zealand species is Quasibolivinella taylori (Early Oligocene) which presumably was carried here from southern Australia. It was closely followed by the arrival of three cosmopolitan species—Bolivinella interrupta (Middle Oligocene), B. subrugosa (Middle to Late Oligocene) and B. rugosa (Middle Oligocene to Late Miocene). The endemic Quasibolivinella finlayi n.sp. (Late Oligocene to Middle Miocene) and Bolivinella bensoni n.sp. (Late Oligocene to Early Miocene) probably evolved from Q. taylori and B. rugosa respectively. Cosmopolitan Bolivinella australis is recorded from the Early Miocene of Northland during the New Zealand Tertiary climatic peak. Extrapolation from the distribution of closely-related, modern B. phillippinensis, indicates that seasonal sea surface temperatures at that time were no cooler than 22-27°C. The last two species, B. lilliei n.sp. and B. profolium n.sp., appear to have arrived in New Zealand in the Late Miocene and survived for only a short period. The disappearance of all Bolivinellidae from the New Zealand record in the early Late Miocene is thought to be due to a rapidly cooling climate. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 133 van 206 gevonden artikelen
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