RAE BAXTER'S ANNOTATED KEY TO THE FISHES OF ALASKA

OR

THE "NIT-PICKER'S KEY TO FISH"




NOTACANTHIDAE

   
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Mouth “normal”;   maxilla toothless;   premaxilla and dentary toothed;   branchiostgal rays 6-13;
         gill rakers well developed;   dorsal fin with 6-40 isolated spines and no conspicuous rays.   

  1 - Dorsal spines IX.


Notacanthus chemnitsi   ( Bloch, 1787 )


Range : Northeastern Pacific Ocean, 45  54' N,  125  05'W ( BCMP 71-194) 126-3230m

Refer  : Baxter #760

             Lea & Rosenblatt, 1987:51, fig.1


         Dark brownish.

         Body elongate, compressed;    maxillary extends to mid eye;   interorbital space convex;

filamentous tail.

         Last dorsal spine longest; distance from base of pectoral fin to lateral line is greater,

120.9%, than distance from pectoral fin base to posterior edge of operculum.

         Single lateral line, pores small and numerous;   body scaled with numerous small scales.

         Palatine with 2 or more tooth rows;    lower jaw with 2 tooth rows, upper with 1.

  TL 575; 525g         D VIII-XII 2         Head L 14.7 – 17.3% SL
  SL = 97.0 – 98.4% TL         A XIII-XVII 115-127         Body D 9.3 – 13.1% SL
  LLc 1        Pec 12-16:  42-52% HL         PreD L 38.8 – 40.4% SL
  LLp +++        Pel III 6-7:  28-37% HL         PreA L 40.5 – 47.0% SL
  Ls 113-126        Caudal 5        Snout L 21.4 – 26.7% HL
  Ds   ++ ;    Vs    ++         BR 7-11        Up Jaw L 25.0 – 39.1% HL
  GR 2-5 + 1 + 11 = 17         Pseudobr
     Orbit L 15.3 – 22.1% HL

= 13-17         Vomer teeth 15.9% HL         Eye L 11.4 – 18.5% HL
  GR L 3.3 – 6.8% HL         Palatine teeth
     InOrb W 9.4% HL
  Caeca 6



  Vert 51-55 +




171-180 = 225 -234   





Notacanthus chemnitsi







  1 - Dorsal spines more than XXX (2)




2 (1) - Distance from base of pectoral fin to lateral line is about same distance as from base of pectoral

  to posterior edge of operculum.


Polyacanthonotus altus  ( Gill & Townsend, 1897 ) notacanthid


Range : Bering Sea

Refer  : NODC #8740300201

TL
   D XXXII         Head L 12.4% SL
SL - 460    A LII,      125         Body D 10.4% SL
LLc 1    Pec 14 :   37% H         PreD L % SL
LLp
   Pel I  9 :   31% HL         PreA L % SL
GR
   C
    Snout L 28.8 % HL
Caeca
   Br
    Max L % HL
Vert
   Pseudobr
    Up Jaw L 18.4% HL


   Vomer teeth
    Orbit L % HL


   Palatine teeth
    Eye L 13.5% HL




    InOrb W 9.4% HL





2 - Distance from base of pectoral to lateral line is less than distance from pectoral base to

  posterior edge of operculum. (3)


Polyacanthonotus challengeri  ( Vaillant, 1888 ) longnose tapirfish


Range : Bering Sea – British Columbia; Japan 1260-3429m

Refer  : Amaoka et al 1983:177, fig.27

             Hart 1973:92

Notes  : NODC #8743030203


        Body cream to fairly pink, possibly with light brown markings;   black on posterior

margins of anal and caudal fins;   black on posterior edge of gill cover;   oral and gill cavities

and part of peritoneum black.

        Body elongate, compressed;   mouth inferior.

        Dorsal fin as isoloated spines;   anal fin long, of spines and rays;   caudal filamentous.

TL - 520        A XXXII-XXXVII         Head L 13.2 – 14.5% SL
LLc 1        D XXXIII-XXXIX         Body D 7.1 – 82% SL
LLp ++      120-140         PreD L % SL
Ls 123-139        Pec 11-14;   34-40% HL         PreA L 34.8 – 36.3% SL
GR 3-4 + 7-10=10-14        Pel I, 8-13; 30-38% HL         Snout L 29.3 – 34.0% HL
Pyloric caeca
     C 5      Max L % HL
Vert 55-62 + 187 =        Br 5      Up Jaw L 17.0 – 17.8% HL

= 242-244        Pseudobr
     Orbit L % HL


     Vomer teeth
     Eye L 14.1% HL


     Palatine teeth +      InOrb W 9.3 – 13.7% HL



Polycanthonotus challengeri








3 - Eye small, 14.1 percent of head length;  interorbital width 7.7 percent of head length.


Polyacanthonotus longus  ( Gill & Townsend, 1897 ) notacanthid


Range : Bering Sea   deep water

Refer  : NODC   # 8743030202

TL -   D XXXIII          Head L 12.1% SL
SL - 526   A LV, 111          Body D 7.9% SL
LLc 1   Pec 13: 32.6% HL          PreD L % SL
LLp
  Pel I 9: 30.9% HL          PreA L % SL
Gr
  C
     Snout L % HL
Pyloric Caeca
  Br
     Max L % HL
Vert
  Pseudobr
     Up Jaw L 18.5% HL


  Vomer teeth
     Orbit L % HL


  Palatine teeth
     Eye L 14.1% HL




     InOrb W 7.7% HL