The revision of "Cladodus" occidentalis, a late Palaeozoic ctenacanthiform shark

Michał Ginter, Alexander Ivanov, Oleg Lebedev

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

28 Цитирования (Scopus)

Аннотация

The teeth of a well known late Palaeozoic cladodont chondrichthyan, "Cladodus" occidentalis from Russia, USA, and England are restudied and a new generic name, Glikmanius gen. nov., is proposed for this species. Yet another tooth-based species, formerly described as ?Symmorium myachkovensis, occurring on the Russian Platform and in Nebraska, is considered to belong to the newly erected genus. Although there is no direct evidence that Glikmanius possessed fin spines, the broad similarity between its teeth and those of Ctenacanthus compressus suggests it had a ctenacanthiform affinity. The possible relationships between Glikmanius, Cladodus sensu stricto, "Ctenacanthus" costellatus, and Heslerodus, are suggested. However, the proposition put forward by an earlier author that the teeth of Heslerodus might represent the lower jaw dentition of G. myachkov ensis, is rejected. The overall resemblance of Glikmanius teeth and those of Cladoselache and Squatinactis is recognised as convergent.

Язык оригиналаанглийский
Страницы (с-по)623-631
Число страниц9
ЖурналActa Palaeontologica Polonica
Том50
Номер выпуска3
СостояниеОпубликовано - 1 сен 2005

Предметные области Scopus

  • Палеонтология

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