Species or population? Systematic status of Vieja coatlicue (Teleostei: Cichlidae)

Abstract

Pacific and Atlantic-slope rivers of the Isthmus of Tehuantepec in Mexico contain two cichlid species of the genus Vieja relevant to the current study, V. zonata and V. coatlicue, respectively. The Atlantic-slope species was initially considered a population of uncertain taxonomic status and recently described as a distinct species based on three putatively diagnostic morphological characters. The objective of this study was to combine new and existing genetic data, along with reanalysis of morphological characters, to test the distinctiveness of V. coatlicue. Little genetic variability and no geographic structuring were recovered. Additionally, putatively diagnostic morphological character states were present across both species, failing to separate the forms. The synthesis of molecular and morphological data supports the recognition of V. coatlicue as a junior synonym of V. zonata.

Past and recent connectivity of white mullet between the Gulf of Mexico and the Mexican Pacific inferred through sequences of the gene cytochrome c oxidase I and microsatellites

“…and Rhamdia laticauda. Another example was presented in the cichlid Vieja coatlicue, a species described only for the Atlantic slope that is now taxonomically listed as a more recent synonym for V. zonata of the Pacific since morphological and molecular characters did not separate these two forms (McMahan et al 2019).…”

Ichthyofauna from the Zoque Rainforest of Santa Maria Chimalapa, Oaxaca, Mexico

“…), pudo haber conectado a las vertientes del Atlántico y Pacífico (Maldonado-Koerdell, 1964;Marshall & Liebherr, 2000;Anzueto-Calvo et al, 2016). Lo que resulta en una vía importante para el desplazamiento de peces y otros organismos acuáticos, ejemplo de ello son los géneros Ophisternon, Poeciliopsis, Rhamdia y Vieja (Mateos et al, 2002;Perdices et al, 2002Perdices et al, , 2005McMahan et al, 2019). (2020) mencionan la presencia de tres cíclidos y un eleótrido en el río Negro (Fig.…”