摘要:

Paracomatula triadicasp. nov. from the Late Triassic (Otapirian, upper Norian) Bouraké Formation of New Caledonia is the earliest known feather star. Its primitive characters (short arms, branching only once isotomously, long cylindrical cirrals and tall brachials) suggest that the paracomatulids are a Late Triassic offshoot of the holocrinids rather than the more specialized pentacrinitids. The paracomatulids appear for the first time after the mid Carnian extinction. Their eleutherozoic life style was to become the most successful strategy among modern articulate crinoids.

ISSN:0311-5518    

DOI:10.1080/03115519308619484

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Pengana robertbolesi, a fossil raptor from the Tertiary of Riversleigh, northwestern Queensland, shares with the living generaPolyboroidesandGeranospizaa distinctive morphology of the distal tibiotarsus. The modified structure of the intertarsal joint permits a much greater degree of both anterioposterior and mediolateral flexion than in other species of the Accipitridae. Living species employ acrobatic foraging methods, using the flexible leg to probe hollows and recesses. It is considered thatP. robertbolesiused similar foraging techniques. Because it was approximately twice the size of living taxa, it probably was capable of predating substantially larger prey.

ISSN:0311-5518    

DOI:10.1080/03115519308619485

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0311-5518    

DOI:10.1080/03115519308619486

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Dredged calcareous sediments associated with the volcanic edifices of Gascoyne, Taupo, Derwent Hunter, Stradbroke, Britannia, Moreton and Recorder Seamounts (Tasmantid Seamount chain) and Nova Bank, Argo Bank, Capel Bank and Gifford Guyot (Lord Howe Seamount chain) have yielded a diverse biota including abundant foraminiferids and calcareous algae. These fossils constrain hypotheses on the age and environment of formation of the seamounts and also give data on oceanographic conditions existing at the time of accumulation of the sediments. All sediments accumulated in normal marine salinities.

ISSN:0311-5518    

DOI:10.1080/03115519308619487

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Early Permian brachiopods are described from the Garu Formation of the eastern Himalaya. New species areTivertonia tatamariensis, Costatumulus sahnii, Tomiopsis siangensisandTrigonotreta orientensis. The age of the fauna is reviewed with an early Sterlitamakian (Sakmarian) age being preferred.

ISSN:0311-5518    

DOI:10.1080/03115519308619488

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Two species ofNothofagusmacrofossils,Nothofagus novaezealandiaeandN. pinnata, are redescribed from sediments of late Middle Miocene to early Late Miocene age of the Dunedin Volcanic Province, New Zealand. Examination of leaf architecture and cuticular morphology placesN. novaezealandiaein the subgenusLophozonia(producingmenziesii-type pollen), and indicates it was evergreen.N. pinnatawas probably also in the subgenusLophozonia.

ISSN:0311-5518    

DOI:10.1080/03115519308619489

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor