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 | 3-1, 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 |
| 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 | ||||
