Timidonella? primitiva n. sp. (Foraminiferida) from the Middle Jurassic of the Eastern Taurides (Southern Turkey): Remarks on Evolutionary Steps of Hauraniids

Erkan Ekmekci & Demir ALTINER

Makale detayları

Timidonella? primitiva n. sp. (Foraminiferida) from the Middle Jurassic of the Eastern Taurides (Southern Turkey): Remarks on Evolutionary Steps of Hauraniids

Yazarlar:

Erkan Ekmekci & Demir ALTINER

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2008 Vol.17 Issue 1, pp.73-84

Belge Tipi:

Makale

Yayın Tarihi:

12/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000732543

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

Özet:

 

A new species of complex benthic foraminifera, Timidonella? primitiva n.sp., has been identified from the Aalenian?-Bajocian of the eastern Taurides, Turkey. The new species, belonging to the family Hauraniidae SEPTFONTAINE, occurs in the lowermost beds of the Köroğlutepesi Formation and its test is composed of a planispirally coiled early stage followed by an uncoiled rectilinear portion. The internal structure is characterized by four different zones consisting of a subepidermal reticulate layer, a zone of subepidermal plates, a more internal empty zone in the chambers and a primitive interseptal pillar system in the most internal part of the chambers perforated by multiple apertures. Contrary to previous opinions, which considered that Timidonella had evolved from the deserta group, this study suggests instead that derivation of the Timidonella was from the amiji group of hauraniids. Timidonella? primitiva n.sp. was probably an early step derived from the amiji group and led to the evolution of the more advanced species, Timidonella sarda.

 

A new species of complex benthic foraminifera, Timidonella? primitiva n.sp., has been identified from the Aalenian?-Bajocian of the eastern Taurides, Turkey. The new species, belonging to the family Hauraniidae SEPTFONTAINE, occurs in the lowermost beds of the Köroğlutepesi Formation and its test is composed of a planispirally coiled early stage followed by an uncoiled rectilinear portion. The internal structure is characterized by four different zones consisting of a subepidermal reticulate layer, a zone of subepidermal plates, a more internal empty zone in the chambers and a primitive interseptal pillar system in the most internal part of the chambers perforated by multiple apertures. Contrary to previous opinions, which considered that Timidonella had evolved from the deserta group, this study suggests instead that derivation of the Timidonella was from the amiji group of hauraniids. Timidonella? primitiva n.sp. was probably an early step derived from the amiji group and led to the evolution of the more advanced species, Timidonella sarda.

Makale detayları

Timidonella? primitiva n. sp. (Foraminiferida) from the Middle Jurassic of the Eastern Taurides (Southern Turkey): Remarks on Evolutionary Steps of Hauraniids

Yazarlar: Erkan Ekmekci & Demir ALTINER

Yayıncı: TUBITAK

Dergi: Turkish Journal of Earth Sciences 2008 Vol.17 Issue 1, pp.73-84

Belge Tipi: Makale

Yayın Tarihi: 12/2007

Belge Dili: Türkçe

Document ID (Org No.): 2000732543

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

Sayı

Yazarlar:

Erkan Ekmekci & Demir ALTINER

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2008 Vol.17 Issue 1, pp.73-84

Belge Tipi:

Makale

Yayın Tarihi:

12/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000732543

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985