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0梅达华组(Midawara Formation)属路特阶晚期(Lutetian)至巴尔顿阶早期(Bartonian) , 在这个组份发现的大型掠食性鲨类牙齿化石较多 , 艾氏鼬鲨(Galeocerdo eaglesomi)牙齿型态和尺寸都和今天的居氏鼬鲨很相近 , 大概艾氏鼬鲨(Galeocerdo eaglesomi)进食形成和居氏鼬鲨相近。值得一说的是在摩洛哥西南部发现的艾氏鼬鲨相似种(Galeocerdo cf. eaglesomi)牙齿化石大小是尼日尼亚Ameki地区发现的艾氏鼬鲨(Galeocerdo eaglesomi)牙齿的两倍 , 尼日尼亚Ameki地区发现的艾氏鼬鲨(Galeocerdo eaglesomi)化
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105
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48
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89
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133
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4We report on new mosasaurid remains, namely isolated teeth, from the Upper Maastrichtian shallow marine environment of Albaina in the Laño quarry (Condado de Treviño). The new specimens belong mostly to mosasaurines, i.e., Mosasaurus hoffmanni, Prognathodon solvayi, Prognathodon sectorius, and to the russellosaurine plioplatecarpine Platecarpus cf. ictericus. Prognathodon solvayi and Platecarpus cf. ictericus were previously known from Albaina. This is the first mention in the site of Mosasaurus hoffmanni, widespread in Maastrichtian outcrops located around palaeolatidude 30-40°N, from New
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4A closeup of the skinless shark's body and toothless mouth(Image: © Mulas et al.) In July 2019, fishers trawling the Mediterranean Sea south of Sardinia, Italy, accidentally pulled a mutant from the depths. Ensnared in their net among hundreds of other fish, sharks and assorted marine life was a blackmouth catshark (Galeus melastomus) — seemingly born without skin or teeth. While scientists have reported numerous cases of albinism, discoloration and other genetic skin mutations in sharks before, this rare catch is the first and only known case of a shark living with a "severe lack
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68@筗榊之望 你要的上龙 阿伯兰利怪兽的老推算镇楼 上龙头骨的一些重要区分 (1) rounded dorsomedian foramen situated between the nares (2) foramina present on the frontals (3) premaxilla–maxilla sutures run parallel to each other anterior to the nares (4) palatine excluded from internal naris (choanae), (5) length and width of premaxillary rostrum subequal, (6) short mandibular symphysis (length/width=0.60–0.89), (7) rounded bulb/bump protruding from the medial margin of the retroarticular process (8) presence of a quadrate foramen. (1) 位于鼻孔之间的
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23语句可能有点不通顺,请各位观众老爷们见谅
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