Chilomycterus spinosus (Linnaeus, 1758)
(Diodontidae, Tetraodontiformes)
The collection contains otoliths from 86 individuals of this species, ranging from 40 to 190 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 13 analysed otoliths. See more detailed data here (in portuguese).
![](spimages/tf_CHSP.png)
![](spimages/td_CHSP.png)
Otoliths from Chilomycterus spinosus, with total length of A. 52mm; internal side A1; external side A2; profile of the ventral region A3; click the figures for larger version*
Morphology:
Shape: discoidal (69%), tall (31%). Anterior region: rounded (69%), double-peaked (15%), notched (8%), flattened (8%). Posterior region: rounded. Dorsal edge: entire (62%), sinuate (38%). Ventral edge: entire (62%), sinuate (38%). Profile: plane-convex. Rostrum and antirostrum orientation: not applicable (92%), in agreement (8%). Rostrum: absent. Antirostrum: absent (92%), underdeveloped (8%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position inframedian, orientation horizontal, opening ostiocaudal (92%), ostial (8%), morphology pseudo-archaesulcoid, colliculum monomorphic, ostium tubular (54%), funnel-like (46%), cauda markedly curved tubular (62%), straight tubular (38%).
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 0.85 ± 0.16 | 0.62 | 1.19 |
OH / OL % | 117.93 ± 10.21 | 96.10 | 135.71 |
OT / OL % | 44.61 ± 6.19 | 33.33 | 54.76 |
OT / OH % | 37.97 ± 5.49 | 29.41 | 47.92 |
Circularity | 14.49 ± 1.56 | 13.16 | 17.87 |
Rectangularity | 0.76 ± 0.06 | 0.68 | 0.85 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 27.5.CHSP.SARVII.AM.6.14 (52 mm)
For more information about this species: