| 词条 | Xiphophorus nigrensis |
| 释义 |
|taxon = Xiphophorus nigrensis |authority = D. E. Rosen, 1960 }}Xiphophorus nigrensis is a species of fish in the Poeciliidae family that is endemic to a small part of the Pánuco River basin in Mexican.[1][2] References1. ^{{cite web|url=http://www.cbif.gc.ca/pls/itisca/taxastep?king=every&p_action=containing&taxa=Xiphophorus+nigrensis&p_format=&p_ifx=cbif&p_lang= |title=Xiphophorus nigrensis |accessdate=12 Sep 2012 |deadurl=yes }} {{Taxonbar|from=Q3753597}}{{Cyprinodontiformes-stub}}2. ^{{cite journal | author1=Kang, J.H. | author2=M. Schartl | author3=R.B. Walter | author4=A. Meyer | year=2013 | title=Comprehensive phylogenetic analysis of all species of swordtails and platies (Pisces: Genus Xiphophorus) uncovers a hybrid origin of a swordtail fish, Xiphophorus monticolus, and demonstrates that the sexually selected sword originated in the ancestral lineage of the genus, but was lost again secondarily | journal=BMC Evolutionary Biology | volume=13 | issue=25 | doi=10.1186/1471-2148-13-25 }} 2 : Xiphophorus|Fish described in 1960 |
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