Octopus hubbsorum is the most commonly captured species of octopus on the western coast of Mexico. Despite the commercial importance of this species, management information remains scarce. We determined the genetic diversity and population genetic structure of O. hubbsorum by using mtDNA sequences (COI and ND5). The population structure was not supported by AMOVA or a spatial clustering model. Furthermore, an isolation by distance model did not explain our data. Three haplogroups were detected using a Bayesian assignment; however, the distribution of these haplogroups did not differ among the sampling sites. Our results indicated historical processes of a sudden population expansion, as has been reported for other species in the study region as consequence of climatic changes. However, this expansion did not affect the distribution of the mitochondrial lineages analysed in the study. The weak population genetic structure in O. hubbsorum associated with the life history of the species can explain our results. We suggest that to expand knowledge regarding the genetic structure and population dynamics of O. hubbsorum throughout its range, markers such as microsatellites or single-nucleotide polymorphisms (SNPs) are needed. Thus, on the basis of the information available, the studied population should be assumed to have a weak genetic structure.

RESUMENEn septiembre de 2020 fue registrado el atropellamiento de un ejemplar de zorrillo pigmeo (Spilogale pygmaea) a 1.39 kilómetros al norte de Zacualpan, municipio de Compostela, Nayarit, México. Este es el segundo registro de zorrillo pigmeo en el municipio de Compostela después de 50 años de su primer registro y el tercero en el estado de Nayarit. Este trabajo pone de manifiesto la importancia de los estudios sobre atropellamientos de fauna silvestre en las carreteras del estado de Nayarit.Palabras clave: atropellamiento, carreteras, Compostela, endémica, especie amenazada, Nayarit, Spilogale pygmaea.ABSTRACTIn September 2020, a pygmy skunk (Spilogale pygmaea) was run over 1.39 kilometers north of Zacualpan, Compostela municipality, Nayarit, México. This represents the second skunk record in the municipality of Compostela after 50 years and the third for the state of Nayarit. This work highlights the importance of studies on the run over of wildlife on the roads of the state of Nayarit.Key words: Compostela, endemic, Nayarit, roads, run over, Spilogale pygmaea, threatened species.

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