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  • D1 origin behind pelvic insertion
    D1 ~1/2 size D2
    Apristurus canutus, Hoary catshark
    distance between pectoral & pelvic 6-9% TL
    A base 2.5-3 X fin height
  • D1 ~same size as D2
    D1 origin slightly before center pelvic base
    Apristurus laurussonii, Flathead catshark, Icelandic catshark, Madeira catshark
  • D1 origin behind pelvic insertion
    D1 ~1/2 size D2
    A base 4 X fin height
    top edge C with denticle crest
    Apristurus parvipinnis, Smallfin catshark
    distance between pectoral & pelvic 10-14% TL
  • D1 origin over rear 1/4 pelvic base
    D1 ~1/2 size D2
    Apristurus riveri, Broadgill catshark
  • shoulder & body: 2 rows round, light edged blotches
    C 2 dark saddles + dark tip
    denticle crests: only top edge of C
    Galeus antillensis, Antilles sawtail catshark
    A base <14% TL
  • 3-6 dark, pale edged saddles behind D1
    2 rows round blotches: eye to A
    C with 2 dark bars
    denticle crests: only top edge of C
    Galeus arae, Marbled catshark, Roughtail catshark
    A base <14% TL
  • head to under D2: row large, round blotches
    eye to A: row large, round blotches
    denticle crests: only top edge of C
    Galeus cadenati, Longfin sawtail catshark
    A base =/> 14% TL
  • head & nape: broad, pointed dark stripe
    back & Ds: dark saddles
    denticle crests: top & bottom edges of C
    Galeus springeri, Striped sawtail catshark
  • body soft, flabby
    snout short, round
    ridge under eye
    D1 < D2; D1 origin before pelvic origin
    D2 ~ A, origin over front 1/2 A base
    C almost no lower lobe
    denticle crests: top edge C, bottom edge tail base
    Parmaturus campechiensis, Campeche catshark
  • adult: saddles indistinct
    no dark spots, many white spots
    D1 ~ D2
    juv 6-9 dark saddles, 3 between Ds
    Schroederichthys maculatus, Narrowtail catshark
    nasal flaps broad, triangular
  • saddles strong, outlined in dark spots
    4 saddles between Ds
    D1 ~ D2
    Schroederichthys tenuis, Slender catshark
    nasal flaps = narrow lobes
  • saddles & blotches outlined by black dots
    few/no white spots
    D2
    Scyliorhinus boa, Boa catshark
  • distinct dark saddles + many small dark spots
    D2
    Scyliorhinus haeckelii, Freckled catshark
  • conspicuous dark saddles
    dense white spots
    D2
    Scyliorhinus hesperius, Whitesaddled catshark
  • dark + dark saddles
    few/no dark spots
    D2
    Scyliorhinus meadi, Blotched catshark
  • network of black lines
    D2
    Scyliorhinus retifer, Chain catshark, Chain dogfish
  • inconspicuous dark saddles + white spots
    D2
    Scyliorhinus torrei, Dwarf catshark