首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Sexual dimorphism in Hecticoceras giganteum SPATH (Ammonoidea) from the Callovian (Middle Jurassic) of Kutch, India
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Sexual dimorphism in Hecticoceras giganteum SPATH (Ammonoidea) from the Callovian (Middle Jurassic) of Kutch, India

机译:印度库奇Callovian(中侏罗世)的Hecticoceras giganteum SPATH(Ammonoidea)中的性二态性

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摘要

The subfamily Hecticoceratinae SPATH, 1925, belonging to the family Oppelidae, is an important faunal element during the Bathonian - Oxfordian. The present paper addresses sexual dimorphism in one of the species of the type genus, i.e. Hecticoceras giganteum SPATH, from Kutch, western India. Dimorphism within this species is marked by size and ornamental disparity, the microconch being much smaller, less ornamented and lappeted.
机译:隶属于H科的Hecticoceratininae SPATH亚科,1925年,在巴东时期-牛津时期是重要的动物区系元素。本文探讨了来自印度西部Kutch的一种属,即Hecticoceras giganteum SPATH类型的物种中的性二态性。该物种内的二态性以大小和观赏差异为特征,微海螺小得多,装饰性和覆盖性差。

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