Xystreurys rasile (Jordan, 1891)
(Paralichthyidae, Pleuronectiformes)
The collection contains otoliths from 163 individuals of this species, ranging from 76 to 392 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 163 analysed otoliths. See more detailed data here (in portuguese).
Right otolith
Otoliths from Xystreurys rasile, with total length of A. 76mm; B. 248mm; C. 392mm; 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: trapezoidal to elliptic (52%), elliptic (48%). Anterior region: peaked-round (84%), peaked (15%), oblique (1%). Posterior region: rounded (33%), flattened (32%), angled (29%), oblique (4%). Dorsal edge: sinuate (94%), entire (6%). Ventral edge: entire (51%), sinuate (49%). Profile: concave-convex (88%), plane-convex (12%). Rostrum and antirostrum orientation: not applicable. Rostrum: absent (96%), Developed (4%). Antirostrum: absent. Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal (93%), ascending (7%), opening mesial (93%), para-ostial (6%), pseudo-ostial (1%), morphology pseudo-archaesulcoid, colliculum heteromorphic, ostium elliptic, cauda round-oval.
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 2.30 ± 0.16 | 1.70 | 2.65 |
OH / OL % | 63.76 ± 4.4 | 54.33 | 76.65 |
OT / OL % | 18.39 ± 2.16 | 14.51 | 24.87 |
OT / OH % | 28.85 ± 2.65 | 22.97 | 36.33 |
Circularity | 15.13 ± 0.56 | 14.40 | 17.50 |
Rectangularity | 0.72 ± 0.02 | 0.68 | 0.76 |
Morphology:
Shape: elliptic (74%), trapezoidal to elliptic (26%). Anterior region: peaked-round (89%), peaked (7%), rounded (4%). Posterior region: rounded (54%), angled (26%), flattened (11%), peaked-round (6%). Dorsal edge: sinuate (75%), entire (25%). Ventral edge: entire (60%), sinuate (38%), lobed (1%). Profile: concave-convex (88%), plane-convex (12%). Rostrum and antirostrum orientation: not applicable. Rostrum: absent. Antirostrum: absent. Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal (99%), ascending (1%), opening mesial (93%), pseudo-ostial (7%), morphology pseudo-archaesulcoid, colliculum heteromorphic, ostium elliptic, cauda round-oval.
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 2.31 ± 0.15 | 1.81 | 2.63 |
OH / OL % | 62.82 ± 4.66 | 53.17 | 72.98 |
OT / OL % | 19.06 ± 2.53 | 14.71 | 27.33 |
OT / OH % | 30.32 ± 3.06 | 23.94 | 41.36 |
Circularity | 15.09 ± 0.59 | 14.00 | 17.38 |
Rectangularity | 0.72 ± 0.02 | 0.68 | 0.79 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 26.2.XYRA.PI.AF.16.20 (76 mm)
- 26.2.XYRA.REV.AF.1021.4 (248 mm)
- 26.2.XYRA.REV.AF.422.1 (392 mm)
For more information about this species: