Sphoeroides testudineus (Linnaeus, 1758)

(Tetraodontidae, Tetraodontiformes)

The collection contains otoliths from 5 individuals of this species, ranging from 79 to 232 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 2 analysed otoliths. See more detailed data here (in portuguese).

Otoliths from Sphoeroides testudineus, with total length of A. 94mm; B. 212mm; internal side A1; B1; external side A2; B2; profile of the ventral region A3; B3; click the figures for larger version*

Morphology:
Shape: hourglass. Anterior region: blunt to peaked (50%), double-peaked (50%). Posterior region: blunt-round. Dorsal edge: sinuate to entire. Ventral edge: entire (50%), sinuate to entire (50%). Profile: plane-convex. Rostrum and antirostrum orientation: in agreement. Rostrum: Developed. Antirostrum: Developed (50%), underdeveloped (50%). Pseudorostrum: underdeveloped. Pseudoantirostrum: underdeveloped. Sulcus acusticus: position median, orientation horizontal, opening ostiocaudal, morphology homosulcoid, colliculum homomorphic, ostium funnel-like, cauda funnel-like.
Description of the terms used

Morphometry:

Shape indices	Mean ± sd	Minimum	Maximum
OL / TL %	1.10 ± 0.49	0.75	1.45
OH / OL %	87.28 ± 3.85	84.56	90.00
OT / OL %	32.46 ± 12.32	23.75	41.18
OT / OH %	37.54 ± 15.77	26.39	48.70
Circularity	16.48 ± 1.13	15.68	17.28
Rectangularity	0.64 ± 0.00	0.64	0.64

Description of the abbreviations used

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

27.4.SPTE.BAIV.AF.1/1.1 (94 mm)
27.4.SPTE.BAIII.AF.1/1.1 (212 mm)

For more information about this species: