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  • front nostril: flap divided
    tan + blue spots
    Arcos decoris, Elegant clingfish
    top jaw with canines
  • front nostril: flap broad, bushy
    brown meshwork + blue spots, 2-3 dark bars at rear
    Arcos erythrops, Rock-wall clingfish
    top jaw + canines
  • front nostril: wide branched flap
    head - white bar through eyes
    back & sides - white spots
    Arcos poecilophthalmos, Galapagos red clingfish
    top jaw no canines
  • front nostril: flap wide, branched
    brown + mesh of red & blue lines & spots
    Arcos rhodospilus, Rock clingfish
    top jaw no canines
  • top lip: large papillae
    D 11, well behind pectoral
    tan + blue mesh+ rear bars
    head - white spots
    fins barred
    Gobiesox adustus, Panamic clingfish
    anus well before D, midway sucker to A
  • top lip: large papillae
    D 10-13, origin well behind pectoral
    body & fins: pale + red dots
    C base: dark bar
    Gobiesox aethus, Red clingfish, Clarion clingfish
    anus nearer A than sucker
    pectoral 23
  • top lip: large papillae
    D 10-11, black spot at front, well behind pectoral
    body & fins dark
    Gobiesox canidens, Dog-tooth clingfish, Socorro clingfish
    lower jaw: 3-pointed incisors + large canines
    anus ~ midway A to sucker
    pectoral 22
  • head - large papillae, some like fingers
    D 14
    top: brown spots; belly: green
    D & A: 2 brown stripes
    Gobiesox crassicorpus, Thick clingfish
    3 small papillae center top lip, 4 more on snout above
    anus nearer A than sucker
    C dark base, 2 outer bars
  • head papillae small, 0 to few on front top lip
    D 11-13, dark spot at front, well behind pectoral
    dense dark brown spots, rear - faint bars
    Gobiesox daedaleus, Dotted clingfish
    anus ~ midway sucker to A
  • top lip - no papillae
    D 17-20, origin near pectoral tip
    dark, mottled & blotched
    Gobiesox marijeanae, Marijean's clingfish, Lonely clingfish
    several dark bars under eye
    anus nearer A than sucker
  • head; large papillae
    D 12-14, well behind pectoral
    body: dark spots & streaks
    D & A: dark stripes
    Gobiesox milleri, Miller's clingfish
    center top lip 2 small papillae, none on snout above those
    anus near A
    C base: dark bar
  • head: long papillae
    top lip: 2 rows papillae
    D 14-15
    light brown + dense dark spots & streaks
    Gobiesox multitentaculus, Tentacled clingfish
    chin - 3 rows papillae + 2 pairs barbels
    anus near A
  • top lip: large papillae
    D 14-15, well behind pectoral
    dense "leopard" spots
    D & A: white tips
    Gobiesox papillifer, Bearded clingfish
    anus near A
  • snout & top lip: large papillae
    D 16-19, origin ~ over pectoral base
    dark + yellow spots
    body ~ 6 bars
    Gobiesox pinniger, Feathered clingfish, Tadpole clingfish
    3 bars under eye
    anus ~ midway between A & sucker
  • snout & lips: no papillae
    nostril + 2 divided flap
    D 18-20, origin over pectoral
    grey body & fins
    pectoral: rays dotted
    Gobiesox schultzi, Schultz's clingfish, Smoothlip clingfish
    anus nearer A
  • snout & top lip no papillae
    D 8-10, well behind pectoral
    pale + dense brown spots
    belly: 2 rows large brown spots
    Gobiesox stenocephalus, Narrow-headed clingfish
    lower jaw: 2 rows teeth
    anus nearer sucker than A
  • top lip: well developed papillae
    D 10-13, well behind pectoral
    brown + fine blue lines
    D, A & C blackish, white edges
    Gobiesox woodsi, Woods' clingfish
    anus nearer sucker than A
  • dark bar under eye
    dark body & fins
    C 10
    Pherallodiscus funebris, Northern frail-disc clingfish
    sucker papillae: 3 rear rows \
  • back & fin rays tan
    C 7-9
    Pherallodiscus varius, Dimorphic clingfish, Southern fraildisc clingfish
    sucker papillae: 2 rear rows
    pectoral rays spotted
  • front nostril: small flap
    D 7
    back: 4 groups dark dots
    fins clear; C base - pale bar
    Tomicodon absitus, Revillagigedos clingfish, Distant clingfish
    blotch above pectoral
    anus ~ midway A to sucker
    pectoral 20
  • no flap front nostril
    D 10-12
    pectoral 21-24
    body - many narrow Y bars, oblique at front
    Tomicodon abuelorum, Grandparent's clingfish
    blotch above pectoral
    anus nearer A than sucker
  • front nostril: large flap
    D 7-8
    pectoral 21-24
    pale + fine dark meshwork
    Tomicodon bidens, Bifid clingfish
    no blotch above pectoral
    anus ~ midway A to sucker
  • front nostril: small flap
    D 6-8
    pectoral 19-20
    green + dark & light reticulations + 4-5 hourglass bars
    Tomicodon boehlkei, Cortez clingfish, Bohlke's clingfish
    blotch above pectoral
    anus nearer A than sucker
  • front nostril: medium flap
    D 7-9
    pectoral 19-20
    top pale; sides - dense dark spots & reticulations
    Tomicodon chilensis, Smallsucker clingfish
    blotch above pectoral
    anus nearer A than sucker
  • front nostril: large flap
    D 8-9
    pectoral 21-23
    pinkish + 4-5 hour-glass bars
    fins yellowish
    Tomicodon eos, Rosy clingfish
    no blotch above pectoral
    anus nearer A than sucker
  • front nostril: small flap
    D 8-9
    pectoral 17-19
    green + many thin oblique white bars
    Tomicodon humeralis, Sonora clingfish
    blotch above pectoral
    anus nearer A than sucker
  • front nostril - small flap
    4 lines down from eye
    D 6-8
    pectoral 20-21
    upper body - white speckling
    over belly - pale stripe with 2 ventral extensions
    Tomicodon myersi, Blackstripe clingfish, Myers' clingfish
    no blotch above pectoral
    anus nearer A than sucker
  • front nostril: small flap
    D 7-8
    pectoral 19-21
    fine brown mesh + irregular bars
    Tomicodon petersii, Peter's clingfish, Hourglass clingfish
    blotch above pectoral
    anus nearer A than sucker
  • front nostril: no flap
    lines down & back from eye
    D 10
    body- 7 brown bars
    C base dark, other fins clear
    Tomicodon prodomus, Ecuadorian clingfish
    blotch above pectoral
    anus nearer A than sucker
  • front nostril: medium flap
    D 7
    pectoral 20
    fine brown vermiculations
    ~ 4 lines down from eye
    Tomicodon vermiculatus, Vermiculate clingfish
    no spot over pectoral base
    anus nearer A than sucker
  • front nostril: medium flap
    D 7-8
    pectoral 19-21
    red & green wiggly lines + 5 dark "hour-glass" bars
    Tomicodon zebra, Zebra clingfish
    blotch over pectoral
    anus nearer sucker than A