Diaphus dumerilii (Bleeker, 1856)
(Myctophidae, Myctophiformes)
The collection contains otoliths from 575 individuals of this species, ranging from 28 to 102 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 41 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Diaphus dumerilii, with total length of A. 28mm; B. 65mm; C. 102mm; 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. Anterior region: double-peaked (78%), peaked (22%). Posterior region: rounded. Dorsal edge: entire (51%), sinuate to entire (46%), lobed to sinuate (2%). Ventral edge: serrate to sinuate (95%), lobed to sinuate (2%), sinuate to entire (2%). Profile: flattened. Rostrum and antirostrum orientation: in agreement. Rostrum: Developed. Antirostrum: Developed (88%), underdeveloped (12%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal (95%), ascending (5%), opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium tubular, cauda round-oval (85%), elliptic (15%).
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 5.20 ± 0.42 | 4.67 | 6.95 |
OH / OL % | 72.15 ± 2.91 | 66.05 | 81.25 |
OT / OL % | 14.64 ± 2.42 | 9.82 | 20.93 |
OT / OH % | 20.25 ± 2.99 | 14.63 | 28.13 |
Circularity | 16.37 ± 1.37 | 12.83 | 19.04 |
Rectangularity | 0.72 ± 0.01 | 0.70 | 0.74 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 10.2.DIDU.REVP.AM.368.13 (28 mm)
- 10.2.DIDU.REVP.AM.372.44 (65 mm)
- 10.2.DIDU.REF.AM.6006.18 (102 mm)
For more information about this species: