†Chaychanus gonzalezorum gen. et sp. nov.: A damselfish fossil (Percomorphaceae; Pomacentridae), from the Early Paleocene outcrop of Chiapas, Southeastern Mexico

Cantalice, Kleyton Magno, Alvarado-Ortega, Jesús, and Bellwood, David Roy (2020) †Chaychanus gonzalezorum gen. et sp. nov.: A damselfish fossil (Percomorphaceae; Pomacentridae), from the Early Paleocene outcrop of Chiapas, Southeastern Mexico. Journal of South American Earth Sciences, 98. 102322.

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Abstract

We describe a new fossil fish, †Chaychanus gonzalezorum gen. et sp. nov., from the Belisario Dominguez quarry, a marine Paleocene outcrop of Chiapas, Southeastern Mexico. The single articulated specimen is placed in the family Pomacentridae based on its pharyngognathy and the presence of two anal fin spines in supernumerary association. At approximately 63 Ma, this is the earliest record of the family. The presence of three supraneural with the predorsal formula 0 + 0/0/1 + 1/combined with several diagnostic features indicates this fossil fish as a new genus and species of damselfish. Following the discovery of ancient taxa belonging to †Eekaulostomidae and Serranidae, this the third percomorph family with possible coral reef associations to be described from these marine deposits. Its presence on the Western margin of the Tethys region highlights the importance of the Western Atlantic in the early origins of tropical marine taxa.

Item ID: 61976
Item Type: Article (Research - C1)
ISSN: 1873-0647
Keywords: Chiapas, Mexico, new genus, new species, Paleocene, Pomacentridae
Copyright Information: © 2019 Elsevier Ltd.
Date Deposited: 31 Mar 2020 19:39
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060301 Animal Systematics and Taxonomy @ 80%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 20%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960803 Documentation of Undescribed Flora and Fauna @ 60%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 20%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 20%
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