Corresponding author: José De La Cruz-Agüero (
Academic editor: N. Bogutskaya
The checklist presented in this study includes the latest taxonomic and systematic modifications and updates (early 2018) for the
Ehemann NR, González-González LV, Chollet-Villalpando JG, Cruz-Agüero JDL (2018) Updated checklist of the extant Chondrichthyes within the Exclusive Economic Zone of Mexico. ZooKeys 774: 17–39.
The natural history of the
Recent chondrichthyans studies have led to various taxonomic and systematic readjustments, name substitutions, new gender-specific combinations and description of new species. New taxonomic arrangements are based on combined conventional morphology, geometric morphometrics and DNA studies (e.g.,
The current systematic checklist of chimaeras, sharks, rays, and skates from the Mexican
In Mexico, an updated inventory of the natural resources relevant to
First, the Weigmann taxonomic checklists (2016, 2017) were consulted to select the species that were registered in the areas defined by the latter author (see also
A systematic listing of the chondrichthyans inhabiting the Exclusive Economic Zone of Mexico (
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Map showing the Exclusive Economic Zone (
Field-specific books were consulted (e.g.,
The detailed literature review involving the species of chimaeras, sharks, skates, and rays that currently exist worldwide includes 1,212 species (
It should be noted that the specific taxonomic richness of the
The dynamism (or uncertainty) of the classification of
Finally, according to the worldwide species richness of
A total of 217 species of chimaeras, sharks, skates, and rays was recorded and classified into two subclasses, one infraclass, two divisions, 13 orders, 44 families, and 84 genera (Table
For this area of the Mexican
The order
For the group of sharks, eight different orders were recorded, including 22 families, 36 genera, and 63 species. The
In this area, the following species were identified as endemic: the Whitemargin smoothhound
The Exclusive Economic Zone of the eastern slope of Mexico was represented by 94 chondrichthyans species that occur only in this area and 31 amphi-American species (125 in total), belonging to two subclasses (Table
The
For the Gulf of Mexico and the Caribbean Sea there were three endemic species of sharks: Campeche catshark
Thirty-one species of chondrichthyans were recorded on both oceanic basins of the
Among the sharks, the genus
In the case of the batomorphs, only four species are distributed on both coasts of the country, the Pelagic stingray
The species richness of Mexican chimaeras, sharks, skates, and rays, when compared to other Latin American countries, is above the 165 species reported for Brazil (
The total numbers of chondrichthyans fishes herein reported to the species, genus, family, and order levels in this study are 217, 84, 44, and 13, respectively. These numbers are similar to those reported for Mexico by
Sharks, in general, are the group with the highest diversity of species in the
The group of the skates and rays contained 98 species and constituted 45% of the total diversity recorded for the
Although the Batomorphi constitutes approximately 53% (633) of the total living species of the
The new families identified and restored by
According to the information in
In the case of the Bat ray
The Spiny guitarfish
For the Disparate angel Shark (
At present, there are recent publications that support the separation of a species considered to have an amphi-American distribution, which is the case for the Nurse shark
Another similar case is for the species the Spotted eagle ray
According to the recent morphometric and molecular results obtained by
The recent taxonomic relocation of the two species of the genus
Finally, a recent taxonomic and morphological revision of butterfly rays (
With the increasing use of various techniques and the analysis tools currently available (e.g., molecular sequences, mitogenome analysis, geometric morphometrics), the future of the biological classification of
As a corollary to the above, recently published works or studies in progress can be cited. Thus,
The authors thank the BEIFI–IPN and CONACyT Program (NRE and LVGG), COFAA–IPN, EDI–IPN and CONACyT–SNI (JDA and JGCV), for their support. The authors thank the Research and Postgraduate Secretariat of the IPN (SIP–IPN) for its support of the project