Amphinaias couchiana (Lea)
|Rio Grande Monkeyface
|syn. Margaron couchianus (Lea), Quadrula couchiana (Lea), Unio couchianus (Lea)|
Mexico: Chihuahua; Coahuila; Nuevo Leon; Tamaulipas
USA: New Mexico; Kinney County / Texas
Rio Grande Monkeyface (English)
|size: ca. 5,3 cm
extinction date: last collected in 1898
|The Rio Grande Monkeyface is
known, on the one hand, from subfossil remains from the Pecos River
drainage in New Mexico / USA, but on the other hand also from live
specimens from the Rio Grande in Texas / USA as well as from the Río
Conchos in Chihuahua and from the Río Salado in Tamaulipas (both in Mexico).
The last living specimes of this species have been collected in the year 1898 near Bracketville in the Kinney County in Texas.
The Rio Grande Monkeyface is very possibly extinct, there exists, however, a vaguely possibility, that a population may still survive at least somewhere in Mexico.