Dibranchus atlanticus Peters, 1876

(Ogcocephalidae, Lophiiformes)

The collection contains otoliths from 21 individuals of this species, ranging from 88 to 188 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 15 analysed otoliths. See more detailed data here (in portuguese).

Otoliths from Dibranchus atlanticus, with total length of A. 88mm; B. 188mm; internal side A1; B1; external side A2; B2; profile of the ventral region A3; B3; click the figures for larger version*

Morphology:
Shape: semicircular (47%), rectangular (27%), elliptic to rectangular (27%). Anterior region: rounded (80%), flattened (20%). Posterior region: rounded (53%), flattened (27%), oblique-round (20%). Dorsal edge: lobed (47%), dentate (27%), entire (13%), dentate to entire (7%). Ventral edge: entire. Profile: plane-convex. Rostrum and antirostrum orientation: not applicable. Rostrum: absent. Antirostrum: absent. Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position inframedian, orientation descending (67%), horizontal (27%), ascending (7%), opening mesial, morphology archaesulcoid (93%), homosulcoid (7%), colliculum monomorphic (93%), homomorphic (7%), ostium absent (93%), oval (7%), cauda absent (93%), round-oval (7%).
Description of the terms used

Morphometry:

Shape indices	Mean ± sd	Minimum	Maximum
OL / TL %	3.63 ± 0.38	2.97	4.35
OH / OL %	71.83 ± 5.26	65.61	84.68
OT / OL %	29.17 ± 4.38	22.59	35.70
OT / OH %	40.72 ± 6.32	31.20	54.03
Circularity	16.22 ± 2.2	13.86	21.80
Rectangularity	0.75 ± 0.05	0.69	0.85

Description of the abbreviations used

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

16.4.DIAT.REV.AF.1135.4 (88 mm)
16.4.DIAT.REV.AF.1127.1 (188 mm)

For more information about this species: