TITANOCETUS, A NEW BALEEN WHALE FROM THE MIDDLE MIOCENE OF NORTHERN ITALY (MAMMALIA, CETACEA, MYSTICETI)
TITANOCETUS, A NEW BALEEN WHALE FROM THE MIDDLE MIOCENE OF NORTHERN ITALY (MAMMALIA, CETACEA, MYSTICETI)
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泰坦鲸，一种产自意大利北部中新世中期的新须鲸（哺乳动物、鲸类、神秘鲸）
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发表时间：
2006
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通讯作者：
M. Bisconti
中科院分区：
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作者：
M. Bisconti
摘要 意大利须鲸化石 Aulocetus sammarinensis Capellini，1901 年，代表了一个新属——泰坦鲸。泰坦巨鲸的正模头骨具有较长的上颌骨上升突、宽而平坦的喙部、额骨的三角形眶间区、鳞状骨颧突的前端向前延伸的部分以及前部圆形、凹入的上枕骨。密须鲸的原始特征包括鳞状骨和顶骨向颞窝的强烈凸出、枕骨髁后方的人字形嵴以及涉及顶骨的明显颞间收缩。古细菌样特征是上枕骨和鼻骨的圆形前突，向前横向收缩。这些和其他特征表明，Titanocetus sammarinensis 代表了一种早期分化的须须须鲸，可能与鲸齿兽类群有关。
Abstract The Italian fossil baleen whale Aulocetus sammarinensis Capellini, 1901, represents a new genus, Titanocetus. The holotype skull of Titanocetus sammarinensis has a long ascending process of the maxilla, a wide and flat rostrum, a triangular interorbital region of the frontal, an anteriorly extended apex of the zygomatic process of the squamosal, and an anteriorly rounded, concave supraoccipital. Features primitive for mysticetes include strong bulging of the squamosal and parietal into the temporal fossa, a lambdoidal crest posterior to the occipital condyles, and a marked intertemporal constriction involving the parietals. Archaeocete-like features are the round anterior process of the supraoccipital and nasals that are transversely constricted anteriorly. These and other features suggest that Titanocetus sammarinensis represents an early-diverging baleen-bearing mysticete probably related to Cetotherium-like taxa.