| 四川资中侏罗纪一新的半椎鱼类及其生物地层意义 |
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| 引用本文： | 苏德造.四川资中侏罗纪一新的半椎鱼类及其生物地层意义[J].古脊椎动物学报,1996,34(2):91-101. |
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| 作者姓名： | 苏德造 |
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| 作者单位： | 中国科学院古脊椎动物与古人类研究所!北京100044 |
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| 摘 要： | 本文记述的棘背天府鱼(新属新种)发现于四川资中沙溪庙组.它只有大的顶骨、少的次眶骨及无饰缘棘鳞等特征,与新鳞齿鱼(Neolepidotes)相似;另外具有很发达的棘状背嵴鳞、少的次眶骨及鳞片无杵臼式关节等特征,与半椎鱼(Semionotus)很相似.天府鱼以其长大的顶骨、较居后的颌关节、较短的眶前距、很发达的棘状背嵴鳞及无饰缘棘鳞等特征,有别于半椎鱼科中所有已知属.根据天府鱼和过去记述的鱼化石,仍认为含鱼层的时代可能为中佚罗世.
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| 关 键 词： | 四川资中 中侏罗世 半椎鱼科 |
A NEW SEMIONOTID FISH FROM THE JURASSIC OF SICHUAN BASIN AND ITS BIOSTRATIGRAPHIC SIGNIFICANCE |
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| Su Dezao.A NEW SEMIONOTID FISH FROM THE JURASSIC OF SICHUAN BASIN AND ITS BIOSTRATIGRAPHIC SIGNIFICANCE[J].Vertebrata Palasiatica,1996,34(2):91-101. |
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| Authors: | Su Dezao |
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| Abstract: | The fossil fishes described here were collected from the Upper Shaximiao Formation of Zizhong,Sichuan,and are referred to a new genus and species,Tianfuichthys spinodorsalis,of the Semionotidae.Tianfuichthys resembles Semionotus in many respects,and Neolepidotes in some respects.It if characterized by extraordinarily spine shaped dorsal ridge scales,large parietals,few suborbitals,lacking fringing fulcra,and distinguished froma all the known genera in the family.By Tianfuichthys and known fossil fishes,the age of the fish bearing beds is probably Middle Jurassic.This new discovery is of great signific ance to the study of the biostratigraphy in Sichuan Basin. |
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| Keywords: | Zizhong Sichuan Middle Jurassic Semionotidae |
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