Morphological abnormality in a Longnose Stingray <i>Hypanus guttatus</i> (Bloch &amp; Schneider, 1801) (Myliobatiformes: Dasyatidae)

Schmid, Kurt; Andrade, Marcelo; Machado, Fabiola; Araujo, Juliana; Corrêa, Eglé; Giarrizzo, Tommaso

doi:10.1590/1676-0611-BN-2019-0792

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Short Communication • Biota Neotrop. 19 (4) • 2019 • https://doi.org/10.1590/1676-0611-BN-2019-0792 linkcopy

Morphological abnormality in a Longnose Stingray Hypanus guttatus (Bloch & Schneider, 1801) (Myliobatiformes: Dasyatidae)

Anormalidade morfológica em uma Arraia-bicuda Hypanus guttatus (Bloch & Schneider, 1801) (Myliobatiformes: Dasyatidae)

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract:

A Longnose stingray Hypanus guttatus (Bloch & Schneider, 1801) embryo with a major asymmetrical morphological abnormality to its pectoral fin was obtained from commercial shrimp fisher's bycatch, off the coast of the Amazon River Mouth in northern Brazil. The specimen and the deformity, which would presumably have impeded its long-term survival, are described and documented in detail. We herein provide the first report of an abnormal individual of this species for the Brazilian coast.

Keywords:
Fish; Elasmobranchs; Atlantic; Teratology; Deformity

Measurement	(mm)
Disc width	95.9
Disc length	96.6
Total length	271.6
Disc length to axil of pectoral fin	44.4
Preoral length	27.2
Preorbital length	27.6
Snout to cloaca	89.9
Snout to aperture end	50.4
Cloaca to sting base	39.8
Tail length	199.2
Tail height	4.9
Height of dorsal finfold	0.5
Eye diameter	7.2
Spiracle length	8.8
Cranial interorbital	15.6
Cranium anterior margin to aperture end	30.9
Interspiracular	24.7
Internarial	6.4
Mouth width	5.4
Distance between first pair of gill slits	12.3
Distance between first and fifth gill slits	9.0
Pelvic fin anterior margin	4.1
Pelvic fin posterior margin	10.2

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