Xiphophorus meyeri Schartl & Schröder, 1988
Affiliation: northern platyfish
IUCN status: extinct in the wild
Distribution: single spring near Melchor Múzquiz, Coahuila, Mexico
Known locations (existing/former): 0/1
Habitat description: spring pool with clear water, submerged aquatic and riparian vegetation, moderate flow; later converted to a semi-natural swimming pool in municipal recreational park
Description: small (mostly < 3,5 cm) platyfish, greyish basic colour, usually with prominent black blotches on the body but not fins
Variability: two forms are know – the spotted one is the most common and dominant; wild form (without deep lying macromelanophores) is less common and recessive
XWG status: actively managed
Represented in aquaria: moderately
Known issues: susceptible to mycobacteria; stopping reproduction for no apparent reason
Known collections or populations: only one population (are all fish descendants of the collection by Meyer,1982? – needs clarification)
This species is managed within the project “Xiphophorus – Northern Platyfish” under the guidance of the Austrian Association for Vivaristics and Ecology (ÖVVÖ).
It is also managed in the Ex situ programme for the family Poeciliidae of the European Association of Zoos and Aquaria (EAZA).