Synagrops spinosus Schultz, 1940
(Acropomatidae, Perciformes)
The collection contains otoliths from 2230 individuals of this species, ranging from 30 to 158 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 70 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Synagrops spinosus, with total length of A. 51mm; B. 85mm; C. 158mm; 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: elliptic (61%), rhomboidal (39%). Anterior region: peaked. Posterior region: rounded (69%), angled (23%), oblique (7%), flattened (1%). Dorsal edge: sinuate to entire (67%), lobed to sinuate (24%), entire (9%). Ventral edge: sinuate to entire (64%), lobed to sinuate (29%), entire (7%). Profile: flattened. Rostrum and antirostrum orientation: not applicable (71%), in agreement (29%). Rostrum: Developed. Antirostrum: absent (71%), underdeveloped (24%), Developed (4%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal (90%), descending (10%), opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium funnel-like (86%), elliptic (14%), cauda straight tubular (57%), slightly curved tubular (39%), strongly curved tubular (4%).
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 6.57 ± 0.54 | 4.99 | 7.90 |
OH / OL % | 51.06 ± 2.22 | 46.68 | 62.11 |
OT / OL % | 11.23 ± 2.54 | 7.95 | 18.94 |
OT / OH % | 22.02 ± 5 | 16.41 | 34.96 |
Circularity | 17.19 ± 0.72 | 15.75 | 19.77 |
Rectangularity | 0.68 ± 0.03 | 0.60 | 0.74 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 25.2.SYSP.OGX2.AM.BMS57/3.28 (51 mm)
- 25.2.SYSP.REV.AF.405.7 (85 mm)
- 25.2.SYSP.REV.AF.615.6 (158 mm)
For more information about this species: