Gobius key

Van Tassell, James L. & Kramer, Annemarie, 2014, A new species of Didogobius (Teleostei: Gobiidae) from the Canary Islands, Zootaxa 3793 (4), pp. 453-464 : 462

Key to the species of Didogobius

1a. Anterior head canals and pores present; preopercle canal and pores present or absent................................ 2

1b. Anterior canals and pores absent; posterior oculoscapular and preopercle canal absent; Canary Islands... Didogobius helenae

2a. Preopercle canal and pores present; caudal fin rounded........................................................ 3

2b. Preopercle canals absent; caudal fin lanceolate; D 2 I,14 depressed fin reaching caudal fin; anal I,12. Lateral scales 65–70, cycloid only; eastern Mediterranean off Israel................................................ Didogobius bentuvii

3a. Body with only cycloid scales............................................................................ 4

3b. Body with cycloid scales anteriorly, ctenoid posteriorly....................................................... 5

4a. Scales in lateral series 33–37; Canary Islands and Cape Verde.................................... Didogobius kochi

4b. Scales in lateral series 55–56; Western Mediterranean Sea including Adriatic Sea.................. Didogobius schlieweni

5a. Scales in lateral series 28–30; D1 first spine longest; Mediterranean Sea endemic.................. Didogobius splechtnai

5b. Scales in lateral series more than 36; D1 second spine longest.................................................. 6

6a. Scales in lateral series about 37; D2 reaching caudal fin when depressed; interorbital width 19% of eye diameter; São Tomé Island........................................................................... Didogobius amicuscaridis

6b. Scales in lateral series 48–51; D2 not reaching caudal fin when depressed; interorbital width 33–36% of eye diameter; Cape Verde Islands............................................................................ Didogobius wirtzi