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Chimaeras are cartilaginous fish that live in waters more than 200 m deep. There are two species in the Rhinochimaeridae family, where only one, Harriotta raleighana, occurs in Mexican waters. It is considered a rare species for the country because of the number of observations and specimens collected in the Mexican Pacific, from Baja California to Colima, starting more than 100 years ago. This work integrates for the first time the published and unpublished information of this species for this region. Only seven specimens have been collected; they are deposited in different scientific collections of Mexico and the USA. Interestingly, none of these specimens were collected during surveys since all have been collected incidentally by fishermen. There is currently one specimen missing from a collection, a relevant issue due to its rareness. Samples must be deposited and preserved adequately for further studies about this rare and other deep-sea species, that improves the knowledge of the Mexican marine diversity.

Se presenta el primer registro del pez de aguas profundas Harriotta raleighana, conocido como quimera narizona, en la parte sur de Bahía de Banderas, en Jalisco, en el Pacífico central de México. Esta bahía se caracteriza por un cañón de más de 1 000 m de profundidad en la parte sur. El ejemplar colectado es posiblemente una hembra, que se encontró muerta flotando en la superficie a unos metros de la costa. Los registros en el Pacífico mexicano de esta especie han sido esporádicos, originados por colectas fortuitas, o más recientemente, gracias a vehículos sumergibles. Esta especie tiene una distribución mundial en ambientes de zonas profundas de aguas templadas. En el Pacífico se distribuye principalmente en California, aunque se ha observado en el golfo de California, y en las aguas tropicales del país el único registro previo más al sur de Jalisco fue cerca de Manzanillo, Colima, en 2007. Se proporcionan medidas y datos biológicos que permiten comparar los ejemplares hallados en el país.Palabras clave: quimera, Bahía de Banderas, arquibéntico, zona abisal.

A new species of the pinnotherid crab genus Austinixa from La Cruz de Huanacaxtle, Nayarit, Mexico is described. The new species is closely related to Austinixa roblesi Palacios Theil and Felder, 2020, however these can be distinguished mainly by the shape of the male pleon and telson, gonopod and chelae. In addition, four new records of distribution of Austinixa felipensis Glassell, 1935 are added. The species is known previously from the type locality to the north of the Gulf of California and the Pacific coast of El Salvador and Nicaragua. The new collection sites are located on the eastern coast of the Gulf of California and the states of Nayarit and Jalisco, Mexico.