Nicholsina usta usta (Valenciennes, 1840)
(Scaridae, Perciformes)
The collection contains otoliths from 3 individuals of this species, ranging from 148 to 175 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 3 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Nicholsina usta usta, with total length of A. 175mm; internal side A1; external side A2; profile of the ventral region A3; click the figures for larger version*
Morphology:
Shape: elliptic (67%), elliptic to rectangular (33%). Anterior region: peaked (33%), double-peaked-round (33%), angled-round (33%). Posterior region: oblique-round (67%), rounded (33%). Dorsal edge: lobed to sinuate. Ventral edge: dentate to lobed (67%), lobed (33%). Profile: concave-convex. Rostrum and antirostrum orientation: in agreement (67%), in disagreement (33%). Rostrum: Developed. Antirostrum: Developed. Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position supramedian, orientation horizontal, opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium funnel-like (67%), round-oval (33%), cauda elliptic.
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 2.12 ± 0.14 | 1.95 | 2.22 |
OH / OL % | 52.22 ± 7.65 | 46.46 | 60.90 |
OT / OL % | 13.36 ± 1.73 | 11.81 | 15.22 |
OT / OH % | 25.62 ± 0.74 | 25.00 | 26.44 |
Circularity | 25.40 ± 3.69 | 21.24 | 28.25 |
Rectangularity | 0.70 ± 0.01 | 0.68 | 0.71 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 25.32.NIUS.BAIII.C.6/1.3 (175 mm)
For more information about this species: