Benthodesmus elongatus (Clarke, 1879)

(Trichiuridae, Perciformes)

The collection contains otoliths from 114 individuals of this species, ranging from 256 to 494 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 61 analysed otoliths. See more detailed data here (in portuguese).

Otoliths from Benthodesmus elongatus, with total length of A. 259mm; B. 370mm; C. 494mm; 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: spindle-shaped. Anterior region: peaked-round (90%), peaked (10%). Posterior region: flattened (38%), oblique (26%), blunt (21%), peaked-round (15%). Dorsal edge: sinuate to entire (93%), lobed to sinuate (7%). Ventral edge: sinuate to entire (84%), entire (11%), lobed to sinuate (5%). Profile: flattened. Rostrum and antirostrum orientation: not applicable. Rostrum: absent (69%), Developed (31%). Antirostrum: absent. Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal, opening mesial (38%), pseudo-ostial (31%), ostial (31%), morphology archaesulcoid (77%), pseudo-archaesulcoid (23%), colliculum monomorphic (77%), heteromorphic (23%), ostium absent (77%), tubular (11%), funnel-like (11%), cauda absent (77%), straight tubular (23%).
Description of the terms used

Morphometry:

Shape indices	Mean ± sd	Minimum	Maximum
OL / TL %	0.75 ± 0.05	0.50	0.92
OH / OL %	32.71 ± 1.47	29.53	36.75
OT / OL %	14.14 ± 1.28	11.69	17.47
OT / OH %	43.28 ± 4.03	35.40	52.94
Circularity	21.70 ± 0.83	19.82	24.21
Rectangularity	0.73 ± 0.02	0.70	0.77

Description of the abbreviations used

* Vouchers:
Collection identifier for the individuals shown on photography and drawings:

25.56.BEEL.REF.AM.6.26 (259 mm)
25.56.BEEL.REF.AM.6.5 (370 mm)
25.56.BEEL.REV.AF.1013.1 (494 mm)

For more information about this species: