Key to the species of Elacatinus
by J. Van Tassell

1a Second dorsal with 10 elements and anal with 9;...................................................2
1b Second dorsal with 11 elements and anal with 10 (sometimes 9);.......................3
2a No scales present including basicaudal scales; wide vertical straight
dark bands on body with narrow light interspaces, no spots
on head; ................................................................................................... limbaughi
2b Two modified basicaudal scales present; spots in 4 longitudinal rows on head and body, internal wavy vertical bands ..................................................... janssi
3a Two modified basicaudal scales present; D1 spines not elongate; bright red
longitudinal line on head, 8 internal dark spots on body, an internal longitudinal
line above gut ................................................................................ puncticulatum
3b Head without bright red longitudinal line; body with internal bands
or blotches .................................................................................................................4
4a Body with internal markings only, no external bands on body ..............inornatus
4b Body with both internal bands and external bars.................................................. 5
5a External bars irregular and wider than pale interspaces.................... nesiotes
5b External bars on body wavy, dark, and narrower than the
interspaces ..................................................................................................digueti

 

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