Key to the species of Gobiosoma
by J. Van Tassell


Fig a --------------------------------------------------------- Fig b

1a D2 with 11-13 elements; preopercle with 2-3 pores; oculoscapular pores K,L
present or absent; barbels present or absent............................................................2
1b

D2 with 10 elements, males with first 2 spines elongate, females with first spine
elongate; anal 9 elements; preopercle with 3 pores; oculoscapular pores K,L
absent; no barbels present; row 5i/6i at anterior of row b (Fig b above); scale distribution as in (A)................................................................................. sp nov. z

A
2a Mandibular frenum bilobed forming two barbels; D2 generally 12; ...................... 3
2b Mandibular frenum not bilobed with barbels; D2 generally 11, sometimes 12; .....4
3a

Posterior oculoscapular canal pores K,L present; D2 12(11-13), anal 10(9-11);
sensory papillae row 5i/6i under the middle of row b (Fig b above); 4 scales present on caudal peduncle with a few small embedded scales above and below and 1-2
rows under pectoral fin with 4 scales, rarely without scales (A);............................sp h

A
3b

Posterior oculoscapular canal pores K,L absent; all pores large; sensory
papillae row 5i/6i under middle of b(Fig b above); small patch of scales under pectoral fin base(sometimes absent), caudal without scales or only two
basicaudal scales(A); D2 12-13; anal 10.......................................................nudum

A
4a

Small to large barbel present at anterior nostril, no barbel on mandibular
frenum; D2 with 11-12 elements; anal 10; scales extend to under pectoral fin (A);
row 5i/6i at anterior of row b ................................................................ homochroma

A
4b No barbels present; scales on body extending in a wedge to at least under
5th ray of D1; ........................................................................................................... 5
5a

Urogenital papillae of males broad and distinctly bilobed, females with
a notch at posterior end; D1 with elongate spines in males; body with
strong vertical bar pattern; scales extending in a wedge to under
pectoral fin(A); D2 with 11(11-12) elements; anal with 10(9-10); row 5i/6i
at anterior of row b(Fig a above) ....................................................hildebrandi

A
5b Urogenital papillae of males not broad or bilobed, females without a notch at posterior end; D1 with or without elongate spines; scales extending to at least under 7th spine of D1; ................................................................................................. 6
6a

D2 with 12 elements; sensory papillae row 5i/6i under the middle of
row b (Fig b above); preopercle canal with 3 pores; scales extending
forward along dorsal to about 7th ray of D2 and along midline to about
5th ray of D1 (A)............................................................................................paradoxum

A
6b D2 with 11 elements; sensory papillae row 5i/6i at the anterior end of row b (Fig a); preopercle canal with 2-3 pores; scales extending to base of pectoral fin;...........7
7a

D1 of mature males with first two spines elongate (sometimes lacking);
preopercle canal with 3 pores; row 5i/6i at anterior of row b(Fig a above); D2 11.
anal 10-11; scale distribution as below ............................................... chiquita

7b

D1 of males without elongate spines; preopercle canal with 2 pores; scales along
midline extending to under pectoral fin(A); row 5i/6i at anterior of row b(Fig a above); D2 with 11(10-11); anal with 10(9-11) .............................................sp nov b

A

 

 

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