Gymnotus, Craig & Correa-Roldán & Ortega & Crampton & Albert, 2018

publication ID	https://doi.org/ 10.11646/zootaxa.4413.1.3
publication LSID	lsid:zoobank.org:pub:E60E8FC2-8C45-4B3C-B044-720B45D1E401
DOI	https://doi.org/10.5281/zenodo.5987749
persistent identifier	https://treatment.plazi.org/id/03DDD91C-EC5A-5127-7B8A-FB44969BF9EA
treatment provided by	Plazi
scientific name	Gymnotus
status

Key to the Gymnotus View in CoL View at ENA of the Upper Madeira based on external morphology

1a. Single laterosensory pore in the posterior corner of the preopercle, cylindrical body profile................. G. coropinae View in CoL .

1b. Two laterosensory pores in the posterior corner of the preopercle, laterally-compressed body profile................... 2.

2a. Two to three of the anteriormost five pale interbands with both margins crescent-shaped..................... G. chaviro View in CoL .

2b. Margins of all pale interbands straight or curved in parallel.................................................... 3.

3a. Long, shallow head; pale interbands greater than two-thirds width of dark bands....................... G. c. madeirensis .

3b. hort, deep head; pale bands less than two-thirds width of dark bands............................................ 4.

4a. Laterally compressed body......................................................................... G. eyra .

4b. Sub-cylindrical body.......................................................................... G. riberalta .