A new crossognathiform fish (Teleostei: †Crossognathiformes) from San José de Gracia quarry reveals a great diversity in the Cretaceous outcrops of Mexico

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research Pub Date : 2024-10-16 DOI:10.1016/j.cretres.2024.106026

Carlos Iván Medina-Castañeda , Kleyton Magno Cantalice , Carlos Castañeda-Posadas

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Abstract

We describe a new species, †Buapichthys gracilis gen. et sp. nov., based on two specimens from the Turonian deposits of the San José de Gracia quarry, Molcaxac, Puebla, central Mexico. Osteological features show this new species belongs to the order †Crossognathiformes, nesting within the suborder †Pachyrhizodontoidae. The combination of features, such as a slender body, the head with cephalic spines, three hypertrophied postcleithra, the pelvic fin posterior to the dorsal fin, the first and last dorsal pterygiophores modified into scutes, and the dorsal fin bony projections shows that †Buapichthys gracilis gen. et sp. nov. is different from other crossognathiform. This new taxon represents an increase in the group's diversity, constituting the seventh species of the order †Crossognathiformes reported in Mexico. Evaluating the crossognathiform biodiversity over time indicates that the great crossognathiform diversification occurred during the Albian until the Turonian. The Mexican fossil record significantly contributes to this diversity, with about 18 % of the species recognized for this period.

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来自圣何塞德格拉西亚采石场的一种新的十字鱼形鱼类（Teleostei: †Crossognathiformes ）揭示了墨西哥白垩纪露头层的巨大多样性

我们根据墨西哥中部普埃布拉州莫尔卡萨克市圣何塞德格拉西亚采石场图伦纪沉积物中的两个标本描述了一个新物种†Buapichthys gracilis gen.骨骼特征表明，该新物种属于†Crossognathiformes目，巢居于†Pachyrhizodontoidae亚目。身体细长、头部有头棘、三个肥大的后栉骨、盆鳍位于背鳍后方、第一和最后一个背鳍翼片被改造成鳞片以及背鳍骨质突起等特征的组合表明，†Buapichthys gracilis gen.这一新类群代表了该类群多样性的增加，是墨西哥报道的†Crossognathiformes目第七个物种。随着时间的推移，对十字弩形目生物多样性的评估表明，十字弩形目在白垩纪至都龙纪期间出现了巨大的多样化。墨西哥的化石记录为这一多样性做出了重要贡献，约有18%的物种在这一时期得到确认。

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来源期刊

Cretaceous Research 地学-地质学

CiteScore

4.10

自引率

19.00%

发文量

235

审稿时长

12 weeks

期刊介绍： Cretaceous Research provides a forum for the rapid publication of research on all aspects of the Cretaceous Period, including its boundaries with the Jurassic and Palaeogene. Authoritative papers reporting detailed investigations of Cretaceous stratigraphy and palaeontology, studies of regional geology, and reviews of recently published books are complemented by short communications of significant new findings. Papers submitted to Cretaceous Research should place the research in a broad context, with emphasis placed towards our better understanding of the Cretaceous, that are therefore of interest to the diverse, international readership of the journal. Full length papers that focus solely on a local theme or area will not be accepted for publication; authors of short communications are encouraged to discuss how their findings are of relevance to the Cretaceous on a broad scale. Research Areas include: • Regional geology • Stratigraphy and palaeontology • Palaeobiology • Palaeobiogeography • Palaeoceanography • Palaeoclimatology • Evolutionary Palaeoecology • Geochronology • Global events.