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古脊椎动物学报 ›› 1992, Vol. 30 ›› Issue (02): 85-101.

• 古脊椎动物学报 •    下一篇

潘氏北票鲟的新材料及鲟类系统关系

周忠和   

  • 出版日期:1992-06-15 发布日期:1992-06-15

REVIEW ON PEIPIAOSTEUS BASED ON NEW MATERIALS OF P. PANI

Zhou Zhonghe   

  • Online:1992-06-15 Published:1992-06-15

摘要: 本文依据大量潘氏北票鲟的新材料对该种的特征作了补充,主要包括吻部骨片、围眶骨系统、舌颌骨、上颌骨的外翼突、方轭骨、轴部骨骼、尾部棘鳞及轴上鳍条等。另外还对后颞骨、鳃条骨等特征进行了修正。北票鲟的生长与埋藏特点表明北票鲟可能与现生鲟类一样也具有洄游生活的习性。对丰宁北票鲟同潘氏北票鲟的比较表明,除奇鳍条数目不同外,二者在其它方面被认为存在的差别或不成立或需进一步检验。建议将列鳍鱼(Stichopterus)归入修订后的北票鲟科,并认为北票鲟科代表了与鲟科关系最近的已知化石类群。

Abstract: Based on abundant new materials of Peipiaosteus pani, rnany features are newly described, they include: rostral bones, circumorbital series, the ectopterygoid process of the maxilla, quadratojugals, branchial toothplates, axial skeleton, fulcra and epiaxial fin-rays on the caudal fin. A few other features such as the hyomandibula and branchiostegal are revised. The ontogenetic and taphonomic characters of Peipiaoszeus indicate that it probably assumed a habit of migration like its extant descendants. A review of the differences between P. pani and P. fengnengensis shows that all the differences except the dorsal and anal fin-ray numbers proposed by Bai (1983) are not true or remain uncertain. Through comparison, Stichopzerus is included in the revised family: Peipiaosteidae. Finally, a review of the phylogeny of Acipenseriformes results in a conclusion of Peipiaosteidae and Acipenseridae as sister groups.