| FishBase |
| Main Ref: | Miller, R.R. 2005 | |||
| max | min | mod | Ref. | |
| Length at birth (mm) | ||||
| Preanal L. % TL |
| Place of development | in close association with substrate | |||
| Larval area | Mexico | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Ammocoete larval stage duration is four years (Ref. 57533). | ||||
| Striking feature | ||||
| Striking shape lateral | dorsal | |||
| Striking feature | ||||
| Shape of gut | ||||
| Gas bladder early | late | |||
| Spinal armature early | late | |||
| Ammocoetes:. Max. size 176 mm TL. Body proportions, as percentage of TL (based on 30 specimens measuring 120-173 mm TL): prebranchial length, 6.7-9.3; branchial length, 11.2-13.9; trunk length, 47.0-52.5; tail length, 27.2-31.2. Trunk myomeres, 61-65. Body coloration, dark gray on the dorsal and lateral aspects and cream colored on the ventral aspect. Extent of pigmentation: upper branchial, 25% to <75%; caudal fin, 75% or more; tongue precursor bulb and along elastic ridge of tongue precursor, absent or trace. Metamorphosing ammocoetes: lengths unrecorded (Ref. 89241). | ||||
| L 1st feeding | Ref. | Months of presence of larvae | ||||
| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | Sep | Oct | Nov | Dec | ||
| Similar species 1 | 25920Tetrapleurodongeminis |
| Remarks | |
| Álvarez del Villar (1966) could not differentiate the larvae of these two species and the following description/diagnosis probably applies to both species | |
| Water parameters Metric characters |
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