Saurida brasiliensis Norman, 1935
(Synodontidae, Aulopiformes)
The collection contains otoliths from 319 individuals of this species, ranging from 7 to 128 mm of total length. Click here to see the map of the sampling area for the individuals of this species. The following summaries contains data from 37 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Saurida brasiliensis, with total length of A. 45mm; B. 87mm; C. 128mm; internal side A1; B1; C1; external side A2; B2; C2; profile of the ventral region A3; B3; C3; click the figures for larger version*
Morphology:
Shape: fusiform to lanceolated (51%), fusiform (38%), oblong (5%), lanceolated (5%). Anterior region: lanceolated (57%), peaked (38%), peaked-round (5%). Posterior region: rounded (46%), flattened (35%), oblique-round (16%), double-peaked-round (3%). Dorsal edge: lobed to sinuate (51%), sinuate to entire (41%), entire (8%). Ventral edge: sinuate to entire (46%), entire (43%), lobed to sinuate (11%). Profile: plane-convex. Rostrum and antirostrum orientation: not applicable (86%), in agreement (14%). Rostrum: Developed. Antirostrum: absent (86%), underdeveloped (14%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal (73%), descending (27%), opening ostial, morphology pseudo-archaesulcoid, colliculum heteromorphic, ostium tubular, cauda straight tubular.
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 3.44 ± 0.2 | 2.79 | 3.85 |
OH / OL % | 49.96 ± 4.43 | 38.59 | 56.82 |
OT / OL % | 15.67 ± 1.86 | 12.34 | 21.84 |
OT / OH % | 31.43 ± 3.15 | 25.68 | 38.78 |
Circularity | 17.55 ± 1.25 | 15.05 | 20.47 |
Rectangularity | 0.68 ± 0.02 | 0.64 | 0.72 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 9.5.SAUBR.REVP.AM.389.27 (45 mm)
- 9.5.SAUBR.REVP.AM.185.3 (87 mm)
- 9.5.SAUBR.REV.AF.419.1 (128 mm)
For more information about this species: