TABLE 1. Measurements and body proportions of IGM 4716, holotype and single specimen known of Eekaulostomus cuevasae gen. and sp. nov.

  Measurements
  in mm as % of SL
Total length 79.64 -
Standard length (SL) 72.76 -
Head length 26.73 36.73
Postorbital length 51.50 70.78
Orbital length 3.95 5.42
Preorbital length 17.17 23.59
Prepelvic length 33.49 46.02
Predorsal length 58.85 80.88
Dorsal fin length 5.44 7.48
Preanal length 56.98 78.31
Anal fin length 5.01 6.88
Head height 8.51 11.69
Maximum body height 12.14 16.68
Caudal peduncle height 5.02 6.89
Postdorsal length 7.15 9.83
Postanal length 9.33 12.82

 

 

TABLE 2. Comparison between results of phylogenetic analyses on Gasterosteiformes published by Keivany and Nelson (2006, figure 1), results of the same essay obtained in this work, and obtained after the inclusion of Eekaulostomus cuevasae gen. and sp. nov. and characters 111 to 113. The topology of trees in these three analyses is similar (see Figure 6) except for node J after the inclusion of E. cuevasae. Synapormorphies are underlined and characters with different positions throughout these comparisons are in bold.

  Published by Keivany and Nelson (2006). Replay of Keivany and Nelson, (2006), in this work. Present work.
  308 steps, CI=0.5 271steps, CI = 0.43 279 steps; CI = 0.43
A

 

 

43-1, 47-1, 70-1, 80-1, 82-1, 91-2, 104-1, 105-1, 106-1 6-1, 11-1, 14-1, 20-1, 22-1, 43-1, 47-1, 50-1, 60-1, 63-1, 70-1, 82-1, 87-1, 90-1, 91-2, 97-1, 104-1, 105-1, 106-1, 108-1 6-1, 11-1, 14-1, 20-1, 22-1, 43-1, 47-1, 50-1, 60-1, 63-1, 70-1, 82-1, 87-1, 90-1, 91-2, 97-1, 104-1, 105-1, 106-1, 108-1
B - 4-1, 27-1, 31-1, 75-1, 80-1, 99-1, 103-1 4-1, 27-1, 31-1, 75-1, 80-1, 99-1, 103-1
C 7-1, 25-1, 32-2, 41-1, 78-1, 89-1, 91-1, 92-2 1-1, 7-1, 12-1, 25-1 , 30-1, 32-2, 41-1, 71-0, 77-1, 78-1, 85-1, 89-1, 91-1, 92-2 1-1, 7-1, 12-1, 25-1 , 30-1, 32-2, 41-1, 77-1, 78-1, 85-1, 89-1, 91-1, 92-2
D 9-1, 19-1, 57-1, 86-1, 98-1, 100-1 8-1, 9-1, 19-1, 40-1, 50-0, 57-1, 62-1, 65-1, 67-1, 84-1, 86-1, 97-0, 98-1, 100-1, 108-0 8-1, 9-1, 19-1, 40-1, 50-0, 57-1, 62-1, 65-1, 67-1, 84-1, 86-1, 97-0, 98-1, 100-1, 108-0
E - 6-0, 13-1, 18-1, 20-0, 33-1, 35-1, 43-0, 51-1, 52-1, 53-1, 54-1, 88-1, 90-0, 94-1, 95-1, 99-0, 101-1 6-0, 13-1, 18-1, 20-0, 33-1, 35-1, 43-0, 51-1, 52-1, 53-1, 54-1, 88-1, 90-0, 94-1, 95-1, 99-0, 101-1
F 3-1, 10-1, 28-1, 29-1, 30-1, 41-1 3-1, 10-1, 26-0, 28-1, 29-1, 30-1, 41-1, 45-1, 46-1, 58-1 , 59-2, 62-0, 79-1, 82-0 3-110-1, 26-0, 28-129-130-141-1, 45-1, 46-1, 58-1, 59-2, 62-0, 79-1, 82-0
G 1-2, 39-1 1-2, 17-1, 39-1, 50-1
H - 40-0, 43-1, 54-0, 63-0, 65-0, 74-1, 76-1, 88-0, 93-1, 98-0, 108-1 40-0, 43-1, 54-0, 63-0, 65-0, 74-1, 76-1, 88-0 93-1, 98-0, 108-1
I 15-1, 36-1, 49-1, 81-1, 83-1, 96-1 15-1, 32-0, 36-1, 48-1, 49-1, 52-0, 57-0, 59-0, 75-0, 79-0, 81-1 , 82-1, 83-1, 84-0, 88-0, 96-1 15-1, 32-0, 36-1, 48-1, 49-1, 52-0, 57-0, 59-0, 71-1, 75-0, 79-0, 81-1, 82-1, 83-1, 84-0, 96-1
J - - 14-0, 16-1, 22-0, 33-0, 44-1, 64-1, 68-1, 77-1, 78-1, 113-1
K 16-1, 44-1, 64-1, 68-1, 72-1, 77-1, 78-1 14-0, 16-1, 22-0, 33-0, 44-1, 64-1, 68-1, 72-1, 77-1, 78-1, 103-0 72-1, 103-0
Hypoptychidae 13-1, 21-1, 34-1, 48-1, 53-1, 69-1, 88-1 13-1, 17-1, 21-1, 34-1, 48-1, 53-1, 69-1, 88-1 13-1, 17-1, 21-1, 34-1, 48-1, 53-1, 69-1, 71-1, 88-1
Aulorhynchidae - 5-1, 34-1, 66-1, 68-1, 72-1, 101-1
Gasterosteidae - 42-1, 47-0, 51-1, 83-1 42-1, 47-0, 51-1, 83-1
Indostomidae 16-1, 39-1, 48-1, 61-1, 74-1, 76-1, 96-1 14-0, 16-1, 17-1, 32-0, 39-1, 47-0, 48-1, 60-0, 61-1, 63-0, 74-1, 76-1, 96-1 14-0, 16-1, 17-1, 32-0, 39-1, 47-0, 48-1, 60-0, 61-1, 63-0, 71-1, 74-1, 76-1, 96-1
Pegasidae 1-1, 5-1, 12-1, 37-1, 42-1, 83-1 1-1, 5-1, 8-0, 12-1, 31-0, 37-1, 42-1, 71-0, 73-0, 83-1, 84-0, 85-1 1-1, 5-1, 8-0, 12-1, 31-0, 37-1, 42-1, 73-0, 83-1, 84-0, 85-1
Solenostomidae - 2-0, 16-1, 22-0, 24-1 , 42-1, 46-0, 48-1, 51-0, 67-0, 71-0, 72-1, 73-0 2-0, 16-1, 22-0, 24-1 , 42-1, 46-0, 48-1, 51-0, 67-0, 72-1, 73-0
Syngnathidae - 6-1, 7-1, 36-1, 38-0, 44-1, 45-0, 49-1, 62-1, 94-0, 95-0, 96-1, 97-1 6-1, 7-1, 36-1, 38-0, 44-1, 45-0, 49-1, 62-1, 71-1, 94-0, 95-0, 96-1, 97-1
Eekaulostomus - - 19-0, 34-1, 91-0, 111-1, 112-1
Aulostomidae - 23-0, 26-1, 27-0, 45-0, 47-0, 50-1, 55-0, 66-1, 67-0, 101-0, 104-0, 105-0, 106-1, 110-0 23-0, 26-1, 27-0, 45-0, 47-0, 50-1, 55-0, 66-1, 67-0, 71-1, 101-0, 104-0, 105-0, 106-1, 110-0
Fistulariidae - 1-2, 8-0, 71-0, 76-0, 109-0 1-2, 8-0,76-0, 88-1, 109-0
Macrorhamphosidae - 1-1, 46-0, 51-0, 53-0, 56-0, 73-0, 85-1, 86-0, 93-0, 94-0, 99-1 1-1, 46-0, 51-0, 53-0, 56-0, 73-0, 85-1, 86-0, 93-0, 94-0, 99-1
Centriscidae - 8-0, 61-1, 97-1, 98-1, 104-0 8-0, 61-1, 97-1, 98-1, 104-0

 

TABLE 3. Morphological comparison between Eekaulostomus, and both recent and some extinct members of the superfamily Aulostomoidea (Wheeler, 1955; Fritzsche, 1976, 1981; Blot, 1980; among others). Abbreviations: Abd, abdominal.

  Eekaulostomus Macroaulostomus Extant Aulostomus spp. Jungersenichthys Aulostomoides Eoaulostomus Synhypuralis Extant Fistularia spp.
Dorsal fin II + 8 ? + (15)? VIII-XIII + 21-26 - - III +16-21 II or III +14-15 - +14-20
Dorsal spines Stout ? Thin, large - - ? ? No
Anal fin II + 8 ? + 14? III + 23-27 - - III + 16-20 II-III + 12-13 0 + 14-19
Anal fin spines Stout - Thin - - ? ? -
Pectoral fin rays 15 - ? - - 15 15-16 13-18
Pelvic fin Thoracic Anterior? Abd - Abd Abd ? Abd
Pelvic fin rays 6 6 5 - - 6 6 6
Caudal fin formula iv+I+7
--
5+I+iii
iii+I+5
--
5+I+iii
? (15)? - iv+I+5
--
5+I+iv
--
5+I+iii
0+I+6
--
6+I+0
Caudal filament No No No No ? Yes Yes Yes