| 1a |
Dorsal fins connected at least 1/4 distance of D2 spine;
body elongate; eyes very
small, on sides of head; dorsal and anal fins broadly
joined to the caudal fin ...... 2
|
| 1b |
Spinous and ray portions of dorsal fin not connected,
or if connected by
not more than 1/4 the distance from base to distal margin
of the first
element in D2..................................................................................................
3
|
| 2a |
Spinous and ray portions completely
connected forming a single fin, D1 with 6
spines; eyes small, not extending above profile of
head; interorbital space greater
than 4 times eye diameter; D2 - 16; anal - 16; 2-3
rows of teeth in each jaw;
inhabits muddy burrows in tidal streams .............................
Gobioides
peruanus
|
| 2b |
Dorsal fins connected on lower 1/4 of first element
of D2, D1 VII; outer teeth very long, widely spaced;
top jaw not reaching center of eye ..........................................
Akko
|
| 3a |
First dorsal fin with 6 or fewer
spines ..........................................................................4 |
| 3b |
First dorsal fin with 7 or more spines........................................................................
15 |
| 4a |
First dorsal fin with 4-5 spines ......................................................................................5 |
| 4b |
First dorsal fin with 6 spines...........................................................................................8 |
| 5a |
First dorsal fin with 4 spines, rarely 5 or 6; flexible
dermal flap present on
shoulder girdle; minute embedded scales, visible only
with a microscope, or
scaleless ....................................................................................
Evermannia
|
| 5b |
First dorsal fin with 5 spines; shoulder girdle with
dermal flaps or papillae (A);
scales present or absent .............................................................................................6
|
A
|
 |
|
| 6a |
Maxilla extending only to under middle of eye (A);
conspicuous spot on opercle
present or absent..........................................................................................
Ilypnus
|
A
|
 |
|
| 6b |
Maxilla extending well past posterior of eye; no conspicuous
spot on opercle ..... 7
|
A
|
 |
|
| 7a |
Pelvic fins insert in front of pectoral fin base; head
with very low keel or ridge along
the top; ........................................................................................................
Quietula
|
| 7b |
Pelvic fins insert behind pectoral fin base;
no keel or ridge on top of
head;...............................................................................................Clevelander
ios |
| 8a |
Small gobies (less than 2.5 cm) with head and body
more or less laterally
compressed; body slender and not expanded dorso-ventrally;
head canals
without pores; thin vertical bars on body; predorsal
scales lacking; ...Lythrypnus
|
| 8b |
Small(A) to large gobies(B) with head
and body not laterally compressed, or if
compressed, body with dorso-ventral expansion and fleshy
crest on head(C);
head canals and pores present; head and body with or
without vertical bars;
predorsal scales present or absent ............................................................................9
|
| 9a |
Pectoral fin with first few rays almost completely
free from membrane; head
and body with scales......................................................................Bathygobius
|
| 9b |
Pectoral fin with all rays enclosed within the membrane,
or only the first dorsal ray
¼ to ½ free or with only the tips of rays
projecting from membrane; body scaled,
head with or without scales...........................................................................................
10
|
| 10a |
Body laterally compressed and head with dermal ridge;
......................Lophogobius
|
| 10b |
Body not laterally compressed, no dermal
ridge on head .......................................
11 |
| 11a |
Mouth very large, extending to pectoral fin base or
beyond; 80-100 scales
in lateral series ...........................................................................................Gillichthys
|
| 11b |
Mouth not large, ending before or just posterior to
eye; less than
80 scales in lateral series ...........................................................................................
12
|
A
|
 |
|
| 12a |
Body not elongate; caudal fin rounded (A); ..............................................................
13
|
A
|
 |
|
| 12b |
Body elongate; caudal fin elliptical (A) or
lanceolate (B)..........................................
14
|
A
|
 |
B
|
 |
|
| 13a |
Head and body completely scaled; teeth forked at tips(A);
head profile steeply
rounded(B) ....................................................................................
Evorthodus
minutus
|
A
|
|
|
B
|
 |
|
| 13b |
Body scaled only to anterior of D1, no scales on head
or opercle; teeth pointed(A),
not forked at tip; head profile straight between eye
and upper jaw (B)
................ .............................................................................Coryphopterus
urospilus
|
A
|
 |
|
B
|
 |
|
| 14a |
Ocular-scapular canal with two pores; ..................................................Ctenogobius
|
| 14b |
Ocular-scapular canal with four pores; ..................................................Gobionellus
|
| 15a |
First dorsal with 8 spines; cephalic canal
separate between eyes; pore C absent;
canals separate between orbits; pelvic fin disk shaped;
tongue bilobed; body
naked; D2 - 15-16; anal - 12-14; upper jaw with 5 rows
of teeth, outer row large
and widely spaced, lower jaw 4 rows, outer with 5 enlarged
teeth on each side
........................................ ..............................................................
Ophiogobius
jensi |
| 15b |
First dorsal with 7 spines; a single cephalic
canal between eyes; pore C present
or absent .....................................................................................................................
16 |
| 16a |
Ventral surface of lower jaw with three or more barbels;
head without scales
.................... ..................................................................................................
Barbulifer
|
| 16b |
Ventral surface of lower jaw without barbels(A)
or if present only a pair located at the
anterior median symphysis(B); head with or without
scales......................................17
|
A
|
|
|
B
|
 |
|
| 17a |
Pelvic fins completely separated (A), no frenum
connecting the spines and no
membrane connecting the 5th rays(Fig A);...............................................................
18
|
A
|
 |
|
| 17b |
Pelvic fin with a frenum connecting the spines and
the 5th rays connected at
least in part by a membrane(A).............................................................................
21
|
A
|
 |
|
| 18a |
Front nostril longer than rear nostril .......................................................................
19 |
| 18b |
Rear nostril longer than front nostril .......................................................................
20 |
| 19a |
Head without
pores.........................................................................
Chriolepis |
| 19b |
Head with pores; body with ctenoid
scales; scales at the base of the caudal
fin with large ctenii; posterior nostril much smaller
than the anterior
nostril ..............................................................................
Pycnomma
semisquamatum |
| 20a |
Scales on caudal peduncle cycloid; no anterior pelvic
frenum; body with
distinct vertical narrow white bands(10-15) from pectoral
base to caudal
fin ...............................................................................................
Gymneleotris
seminudus
|
| 20b |
Scales on caudal peduncle ctenoid; small
anterior pelvic frenum; color of body pale brown
with white spots ........................................................................
Eleotrica
cableae
|
| 21a |
Head without pores; pelvic fin lacking an anterior
frenum but with the 5th rays connected by a membrane;
...........................................................................
Gobulus
|
| 21b |
Head with pores; pelvic fins connected with an anterior
frenum between the spines and the 5th rays also united
by a membrane ..........................................................22
|
A
|
|
|
| 22a |
Head, nape, and breast with scales; head somewhat laterally
compressed; body color generally a uniform grey-brown,
occasionally with faint vertical bars along midline;
.........................................................................................................
Bollmannia
|
| 22b |
Head and nape without scales; ..................................................................................23 |
| 23a |
Tongue bilobed (Fig A); cephalic head pore C lacking
........................................... 24
|
| 23b |
Tongue rounded or truncate,
not bilobed (Fig B above); cephalic head pore C generally
present..........................................................................................................26 |
| 24a |
Body without scales; a prominent dark, crescent bar
occurs on the outer base of the pectoral fin; body with
narrow, vertical cream colored bands; head distinctly
depressed; tongue bilobed; D2 - 12-13; anal - 11-13;
gill rakers 9-12(8-14) ...................................................................................................................Aruma
histrio
|
| 24b |
Body with scales, at least on the posterior
half; ......................................................
25 |
| 25a |
Second dorsal fin with 15 or more elements; Eyes not
greatly reduced in size; interorbital equal to or less
than eye diameter; head and body somewhat laterally
compressed; outer row of teeth in jaws not exposed..............................
Microgobius
|
| 25b |
Second dorsal fin with 11-14 elements............................................................Parrella
|
| 26a |
Scales on body small and may be somewhat embedded,
40-60 in lateral series; barbels present, at least,
on lower median lip and by anterior nostril ..........Enypnias
|
| 26b |
Scales on body larger and less than 36 in
laterial series or lacking entirely; barbels present or
absent; ...............................................................................................
27 |
| 27a |
Scales on body reduced to only 2 basicaudal scales(A)
or lacking entirely; body with colored vertical bands
or blotches(B) ......................................................
Elacatinus
|
A
|
 |
|
B
|
 |
|
| 27b |
Scales on body at least on caudal peduncle, not extending
along dorsum
further than anterior of D1; body generally a drab brown
with blotches or
bands of similar colors .............................................................................................
28
|
| 28a |
Scales on body extending to first or second dorsal
spine, along dorsal midline(A); pore G present
in oculoscapular canal(B); snout pointed; D2-
11-12; anal - 10-11; scale in lateral series 26-30;
head pores B',C(s),D,E,F,G,H' and K',L '; preopercle
pores M',N,O' ............................................................................
Aboma
etheostoma(C)
|
| 28b |
Scales on midline of body extending to middle of D1
at most (A); pore G absent;
snout rounded(B) ..........................................................................................Gobiosoma
|
A
|
 |
|
B
|
 |
|
