Etropus crossotus Jordan & Gilbert, 1882
(Paralichthyidae, Pleuronectiformes)
The collection contains otoliths from 392 individuals of this species, ranging from 30 to 166 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 118 analysed otoliths. See more detailed data here (in portuguese).
Right otolith
Otoliths from Etropus crossotus, with total length of A. 50mm; B. 109mm; B*. 109mm; C. 157mm; 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: pentagonal (89%), bullet-shaped (10%), elliptic (2%). Anterior region: peaked-round (98%), peaked (2%). Posterior region: blunt (90%), flattened (8%), oblique-round (2%). Anterior dorsal edge: entire (90%), sinuate (10%). Posterior dorsal edge: entire (79%), not applicable (11%), sinuate (10%). Anterior ventral edge: entire (61%), sinuate (38%), lobed (2%). Posterior ventral edge: entire (61%), sinuate (26%), not applicable (11%), lobed (2%). Posterior edge: entire (89%), sinuate (10%), not applicable (2%). Profile: concave-convex. Rostrum and antirostrum orientation: not applicable. Rostrum: absent. Antirostrum: absent. Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation descending (92%), horizontal (8%), opening mesial, morphology heterosulcoid (95%), archaesulcoid (3%), pseudo-archaesulcoid (2%), colliculum heteromorphic (97%), monomorphic (3%), ostium elliptic (97%), absent (3%), cauda round-oval (97%), absent (3%).
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 2.71 ± 0.33 | 2.13 | 3.56 |
OH / OL % | 78.88 ± 6.17 | 61.39 | 93.39 |
OT / OL % | 21.39 ± 2.63 | 17.07 | 27.59 |
OT / OH % | 27.12 ± 2.45 | 22.00 | 32.43 |
Circularity | 14.44 ± 0.4 | 13.66 | 15.79 |
Rectangularity | 0.74 ± 0.02 | 0.70 | 0.79 |
Morphology:
Shape: pentagonal. Anterior region: peaked. Posterior region: blunt (91%), oblique (7%), notched (2%). Anterior dorsal edge: entire. Posterior dorsal edge: entire. Anterior ventral edge: entire (75%), lobed (16%), sinuate (9%). Posterior ventral edge: entire (98%), sinuate (2%). Posterior edge: entire. Profile: concave-convex. Rostrum and antirostrum orientation: not applicable. Rostrum: absent. Antirostrum: absent. Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation descending (96%), horizontal (4%), opening mesial, morphology heterosulcoid, colliculum heteromorphic, ostium elliptic, cauda round-oval.
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 2.71 ± 0.34 | 2.07 | 3.45 |
OH / OL % | 76.64 ± 7.34 | 59.74 | 93.75 |
OT / OL % | 23.35 ± 3.54 | 17.31 | 33.67 |
OT / OH % | 30.57 ± 4.22 | 21.63 | 43.04 |
Circularity | 14.74 ± 0.62 | 13.76 | 17.18 |
Rectangularity | 0.72 ± 0.03 | 0.65 | 0.80 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 26.2.ETCR.BAII.AF.6/1.4 (50 mm)
- 26.2.ETCR.BAIII.AF.7/1.4 (109 mm)
- 26.2.ETCR.BAIII.AF.10/1.3 (109 mm)
- 26.2.ETCR.PI.AF.9.6 (157 mm)
For more information about this species: