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Scientists in Brazil recently announced the discovery of one of the world's oldest reptile remains. They say the bones - dating back to around 237 million years ago - may help explain the rise of the dinosaurs.
The four-legged reptile species is called Gondwanax paraisensis, researchers recently announced in a statement. The animal is believed to have been near the size of a small dog, with a long tail.
The small reptile would have lived in the Triassic Period on land which is today southern Brazil. During this period - from 252 million to 201 million years ago - the world was much hotter.
The fossil was identified as a new silesaurid, a group of reptiles believed to have died off in a mass extinction event. Experts have debated whether silesaurids were true dinosaurs or if they came before dinosaurs.
"Understanding the characteristics of these precursors could shed light on what was crucial for the dinosaurs' evolutionary success," a statement from the researchers said.
In 2014, Pedro Lucas Porcela Aurelio, a medical doctor, found the remains in a piece of rock in the town of Paraiso do Sul. The town sits in Brazil's southernmost state of Rio Grande do Sul.
The Gondwanax paraisensis fossil comes from a time when dinosaurs as well as mammals, crocodiles, turtles and frogs first appeared.
Aurelio gave the remains to a local university in 2021, beginning three years of research.
"Being the first human to touch something from 237 million years ago is extraordinary," Aurelio told Reuters. "It's an indescribable feeling."
The research was led by Brazilian scientist Rodrigo Temp Müller, a paleontologist. His findings recently appeared in an article in the publication Gondwana Research.
Müller said, "The most important part of this finding is its age. Because it's so old, it gives us clues as to how dinosaurs came to be."
Müller added that when Aurelio gave researchers the remains, they were covered by a thick layer of rock. At first, only parts of the backbone could be seen.
Gondwanax means "lord of Gondwana." The name suggests the Gondwana landmass in the southern area of the supercontinent Pangaea. Pangaea later broke apart into continents. The name paraisensis honors the town of Paraiso do Sul.
Words in This Story
fossil - n. a remnant of an organism that has been preserved in the earth's crust
extinction - n. a situation in which a kind of animal no longer exists
characteristic - n. a distinguishing trait, quality, or property
precursor - n. one that comes before and indicates the approach of another; an animal from which another animal evolves from
extraordinary - adj. going beyond what is usual or regular
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n.脊骨,脊柱,骨干;刚毅,骨气 | |
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v.(动词break的过去式)折断;打破 | |
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n.线索( clue的名词复数 );提示;(帮助警方破案的)线索;(纵横填字谜、游戏或问题的)提示词语 | |
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n.鳄鱼( crocodile的名词复数 );(做成皮革的)鳄鱼皮;成对纵列行进的人(尤指儿童) | |
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n.(一片)面包皮,硬外皮,外壳;地壳 | |
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n.测定年龄[年代]v.过时( date的现在分词 );使…显老;显示出…时代(或年龄);鉴定…的年代 | |
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v.辩论( debate的过去式和过去分词 );仔细考虑;思考;盘算 | |
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vbl.死亡,消逝v.死亡,枯萎( die的过去式和过去分词 );死时处于(某种状态)或具有(某种身份)adj.死亡的,消逝的 | |
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n.医生;博士;vt.篡改,对…做手脚 | |
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n.事变,大事件 | |
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adj.进化的;演化的,演变的;[生]进化论的 | |
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v.演变,进化( evolve的第三人称单数 );(动植物等 )进化,进化形成 | |
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vt.解释,说明;vi. 解释,说明,辩解 | |
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n.熄灭,消亡,消灭,灭绝,绝种 | |
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n.发现,发现物;调查的结果 | |
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adj.第一的;adv.首先 | |
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n.化石,食古不化的人,老顽固 | |
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v.建立,创立,创办;vbl.(find的过去分词)找到 | |
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n.蛙( frog的名词复数 );(对法国人的蔑称) | |
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vbl.(give的过去式)给予,产生,发表 | |
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n.礼仪;荣典;礼节; 大学荣誉学位;大学优等成绩;尊敬( honor的名词复数 );敬意;荣誉;光荣 | |
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n.人,人类;adj.人类的,人性的,有同情心的 | |
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adj.重要的;重大的;严重的 | |
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adj.地方性的,当地的,局部的;乡土的;本地的;n.当地居民,本地新闻 | |
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adj.长的 | |
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adj.比较久的;(距离,长度)长的( long的比较级 );长时间的;(因忙或不愉快等)似乎比实际时间长的;长音的 | |
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n.上帝,主;主人,长官;君主,贵族 | |
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n.方法,手段,折中点,物质财富 | |
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adj.远的;休假的,空闲的;adv.走开,出发,隔断;prep.离开,脱落,在...之外 | |
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n.部份,零件;角色,部位;vt.分开,分离,分配;vi.分离,离开;adv.部份地;adj.分离的 | |
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n.部( part的名词复数 );一部分;零件;角色 | |
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n.学时,课时;一段时间,时期,周期;句点 | |
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n.一片,一张 | |
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n.先驱者;前辈;前任;预兆;先兆 | |
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n.先驱( precursor的名词复数 );先行者;先兆;初期形式 | |
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adj.保存的, 蜜饯的, 腌制的 动词preserve的过去式和过去分词 | |
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n.财产,所有物,所有权,性质,特性,(小)道具 | |
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n.出版,发行;出版;公布,发表 | |
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n.品质,特性,才能,质量;adj.优质的 | |
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adv.近来,最近 | |
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n.剩余物,残留物;遗体,遗迹 | |
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n.残留部分,遗迹;adj.剩余的,残余的 | |
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n.爬行动物;两栖动物 | |
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n.爬行动物,爬虫( reptile的名词复数 ) | |
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n.探索;调查;研究 vt./vi.调查;研究 | |
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v.(rose,risen)上升;升起;起床;起立 | |
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n.岩石,岩礁,巨石;v.摇摆,摇动 | |
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v.动词say的过去式、过去分词 | |
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n.(自然)科学家 | |
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n.科学家( scientist的名词复数 ) | |
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vbl.(see的过去分词)看见 | |
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n.车棚,小屋,脱落之物,分水岭;vt.使流出,放射,脱落,散发,摆脱;vi. 流出 | |
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n.情形;境遇;位置 | |
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n.尺寸,大小;v.按大小排列或分类 | |
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pron.某事,某物;被视为有意义的事物 | |
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n.物种,种群 | |
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n.州,国,情形;adj.国家的,州的,正式的;vt.说,陈述,声明,规定 | |
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n.陈述;声明;综述 | |
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建议( suggest的第三人称单数 ); 暗示; 使想起; 启示 | |
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n.尾巴;尾部;跟踪者;vt.尾随,跟踪 | |
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adj. 厚的;adv. 厚,浓,密 | |
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n.触觉,触摸;v.触摸;感动;轻击 | |
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n.市镇,城镇 | |
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n.显著特点,特性 | |
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0 true | |
a.真实,不假的;忠实,可靠的;正确无误的 | |
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n.海龟( turtle的名词复数 );(任何种类的)龟;陆龟;水龟 | |
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adj.能谅解的;通情达理的;n.理解 | |
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n.大学 | |
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0 was | |
v.(is,am的过去式)是,在 | |
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0 whether | |
conj.是否…,是不是…;是否…,是不是… | |
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n.字( word的名词复数 );(说的)话;诺言;口令 | |
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0 world | |
n.世界 | |
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0 would | |
aux.will的过去式;愿,要;常常;大概;将要,会 | |
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n.年( year的名词复数 );年纪;一年的期间;某年级的学生 | |
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