Burrhead chub

The burrhead chub (Macrhybopsis marconis) is a freshwater ray-finned fish in the family Cyprinidae, the carps and minnows. It is endemic to the Colorado, Guadalupe, and San Antonio river drainages in Texas. Its preferred habitat is sand and gravel runs of small to large rivers.

Etymology
The generic name Macrhybopsis refers to macro from the Greek makrós (μaκρóς), long or large, and Hybopsis. The specific name relates to the San Marcos River, part of the Guadalupe system, which is the type locality. The common name is an allusion to the diagnostic nuptial tubercles on the heads of breeding males.