Abstract
Marine isopods, despite being a very diverse group, have been little studied in the Mexican South Pacific. After a revision of 171 specimens collected from Guerrero and Oaxaca, six new species, belonging to five genera, were discovered: Amakusanthura guerrerensis sp. nov., Cortezura caeca sp. nov., Mesanthura antenniformis sp. nov., M. estacahuitensis sp. nov., Skuphonura oaxaquensis sp. nov., and Tinggianthura mexicana sp. nov. In this work, the genera Amakusanthura Nunomura, 1977 and Tinggianthura Chew, Abdul-Rahim & Haji Ross, 2014, are recorded for the first time in the Tropical Eastern Pacific. Also, the distribution range of the genus Skuphonura Barnard, 1925 is increased from the west coast of South America to the southern Mexican Pacific, this being the first record of this genus in the Mexican Pacific. This study doubles the number of species recorded of Anthuridae from the Mexican Pacific, of six to 12 species.
Highlights
Marine isopods, despite being a very diverse group, with more than 6250 species described in the World (Poore & Bruce 2012), have been little studied in the Mexican South Pacific
We describe six new species of Anthuridae from southern Mexican Pacific, belonging to five genera
Many genera are very widespread, and probably old, such as Cortezura, Skuphonura and Tinggianthura, which are represented by few species having been recorded only once and with restricted distribution, so it could be thought that these species probably present a high endemism as mentioned Kensley & Schotte (2000)
Summary
Despite being a very diverse group, with more than 6250 species described in the World (Poore & Bruce 2012), have been little studied in the Mexican South Pacific. 28 species have been recorded in this region, of these only one species of Anthuridae Leach, 1814 has been recorded, Cortezura penascoensis Schultz, 1977 (Espinosa-Pérez & Hendrickx 2001; Bastida-Zavala et al 2013). 65% of these species are distributed in tropical waters and 30% in warm temperate waters; are frequent in cold and polar regions. Some are found in brackish and freshwater environments but mostly live seashore in sediments of different substrates such as coral reefs, algae, coral rubble, and associated with other invertebrates (Poore 2001; Poore & Bruce 2012)
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