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Dergiler / Turkish Journal of Earth Sciences / 2008 / Cilt: 17 - Sayı: 1

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
Sayfa
73–84
Yayın Tarihi
2008-01-01
DOI
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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.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:A new species of complex benthic foraminifera, Timidonella? primitiva n.sp., has been identified from the Aalenian?-Bajocian of the eastern Taurides, Turkey.
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Temel Bulgular & Veri: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.
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Sonuç & Katkı: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.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Foraminifera · new species · evolution

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.

Abstract

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.

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Bu Makaleye Atıf Yap

ALTINER, E. E. &. D. (2008). Timidonella? primitiva n. sp. (Foraminiferida) from the Middle Jurassic of the Eastern Taurides (Southern Turkey): Remarks on Evolutionary Steps of Hauraniids. Turkish Journal of Earth Sciences, Cilt: 17 - Sayı: 1, 73–84. https://ajindex.com/articles/384786

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Kaynakça (12)

  1. ALTINER, D. & SEPTFONTAINE, M. 1979. Micropaléontologie, stratigraphie et environnement de déposition d’une série Jurassique a faciès de plate-forme de la région de Pınarbası (Taurus oriental, Turquie). Revue de Micropaléontologie 22, 3–18.
  2. BASSOULLET, J.P. 1998. Un nouveau grand foraminifère Bostia irregularis n. gen., n. sp. (Lituolacea, Hauraniidae) du Jurassique moyen de Dordogne (France). Revue de Micropaléontologie 41, 181–195.
  3. BASSOULLET, J.P. & BOUTAKIOUT, M. 1996. Haurania (Platyhaurania) subcompressa nov. subgen., nov. sp., grand foraminifère imperforé nouveau (Hauraniidae) du Toarcien inférieur du Maroc septentrional (Rides sud-rifaines). Revue de Micropaléontologie 39, 27–40.
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  8. BASSOULLET, J.P. & LORENZ, J. 1995. Découverte d’une association à Ataxella occitanica Peybernes, grand foraminifère du Jurassique moyen, dans le sud du bassin Parisien. Revue de Micropaléontologie 38, 15–25.
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