Reassessment of Uquiasaurus heptanodonta, an Iguanian Lizard from the Late Pliocene (Uquía Formation) of Northwestern Argentina

IF 1.2 4区地球科学 Q3 PALEONTOLOGY

Ameghiniana Pub Date : 2023-09-18 DOI:10.5710/AMGH.01.09.2023.3577

A. Scanferla, Linda Díaz-Fernández

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Abstract

Abstract. Uquiasaurus heptanodonta was originally described as an iguanian lizard from the Uquía Formation (Late Pliocene) of NW Argentina, known from numerous skull elements. Reexamination of preserved bones indicates the type series comprises more than one species belonging to the extant iguanian genus Liolaemus. The presence of a premaxilla with seven tooth positions among the bone assemblage suggests that species belonging to Liolaemus nigromaculatus group or Liolaemus montanus section have been present in this region up to the Late Pliocene (3.0 to 2.5 Ma), thus expanding the fossil record of the genus Liolaemus in the NW Argentina. Resumen. Uquiasaurus heptanodonta es un lagarto iguánido de la Formación Uquía (Plioceno Tardío) del noroeste de Argentina, conocido por numerosos elementos craneales. El reestudio de los elementos óseos conservados indica que la serie tipo comprende más de una especie perteneciente al género de lagartos iguánidos Liolaemus. La presencia de un premaxilar con siete posiciones dentarias entre el ensamble óseo sugiere que especies pertenecientes al grupo Liolaemus nigromaculatus o a la sección Liolaemus montanus han estado presentes en esta región desde el Plioceno Tardío (3,0 a 2,5 Ma), ampliando así el registro fósil del género Liolaemus en el noroeste de Argentina.

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阿根廷西北部晚上新世(Uquía组)伊瓜尼亚蜥蜴七齿乌奎龙的重新鉴定

Abstract。它最初被描述为一种禽龙，来自阿根廷西北部的uchia组(上新世晚期)，从大量的头骨元素中知道。= =地理= =根据美国人口普查，该地区的总面积为，其中土地和水(0.741平方公里)。在场premaxilla with七牙之间消除对The bone assemblage复核that species Liolaemus应nigromaculatus group or Liolaemus montanus section而目前in this region up to The跳动Pliocene 3.0 to 2.5 Ma),因此expanding化石记录《genus Liolaemus in The NW阿根廷。摘要。七齿Uquiasaurus heptanodonta是一种禽龙，来自阿根廷西北部的uquia组(上新世晚期)，以许多头骨元素而闻名。对保存下来的骨骼元素的重新研究表明，模式系列包括一种以上的鬣蜥属Liolaemus。存在之间的连接与七个修补Liolaemus骨组合表明物种团成员nigromaculatus Liolaemus节montanus出现在这个地区从上新世滞后(3.0 2.5 Ma)的化石记录,从而扩大性别Liolaemus在阿根廷西北部。

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来源期刊

Ameghiniana 地学-古生物学

CiteScore

2.50

自引率

10.00%

发文量

期刊介绍： Ameghiniana is a bimonthly journal that publishes original contributions on all disciplines related to paleontology, with a special focus on the paleontology of Gondwana and the biotic history of the southern hemisphere. Published yearly since 1957, it has undoubtedly become the main palaeontological publication from Latin America. Ameghiniana has recently broadened its editorial board, reorganized its production process, and increased to a bimonthly frequency, which resulted in a significant decrease in the turn around time.