Dasyatidae


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Dasyatidae

 

(stingrays), a family of chondrostean fishes of the order Batoidea or, according to some classifications, the order Selachii. The body is severely flattened from top to bottom and forms a broad, usually rhomboid disk, measuring more than 2.5m across. The pectoral fins merge in front. The slender tail is armed with one or several large bony spines with dentate margins. It can inflict serious wounds, injecting a potent toxin after striking.

There are four genera, embracing about 35 species. The fishes are found mainly in the shallows of tropical and subtropical seas; in the tropics some species enter fresh waters. The stingray Dasyatis pastinaca occurs in the Black Sea and the Sea of Azov; it is widely distributed off the coasts of North Africa, West Africa, and Europe. Dasyatis akajei is common in the Soviet Primor’e; Urolophoides giganteus is occasionally caught in the region.

The fishes usually lie on the bottom, partially burying themselves in the mud. They feed on other fishes and benthic invertebrates. Reproduction is viviparous. The fishes are only of minor commercial significance; a few species are fished in Korea, China, and Japan.

REFERENCES

Nikol’skii, G. V. Chastnaia ikhtiologiia, 3rd ed. Moscow, 1971.
Zhizn’ zhivotnykh, vol. 4, part 1. Moscow, 1971.
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In order to compare histologically the reproductivc systems of four different batoid lineages 93 specimens (62 females and 31 males) of four species were examined: Narcine bancroftii (family Narcinidae), Rhinobatos percellens (family Rhinobatidae), Urotrygon venezuelae (family Urotrygonidae) and Dasyatis guttata (family Dasyatidae).
Histologia comparada del sistema reproductivo de cuatro especies de rayas caribenas (Chondrichthyes: Batoidea)
Carcharhiniformes con 3 familias: Hemigaleidae con una especie Hemipristis serra Agassiz, 1843; Carcharhinidae con 4 especies, Carcharhinus priscus (Agassiz, 1843), Carcharhinus longimanus (Poey, 1861), Isogomphodon acuarius (Probst, 1879) e Isogomphodon caneullensis (Cappetta, 1970) y Sphyrnidae con una especie Sphyrna arambourgi Cappetta, 1970, para un total de 7 especies; y los Batomorphii con un orden Myliobatiformes, representados por 3 familias, Dasyatidae con una especie, Dasyatis cavernosa (Probst, 1877); Rhinopteridae con una especie indeterminada y los Myliobatidae con la especie Aetobatus arcuatus Agassiz (1843) y una especie indeterminada de Myliobatis; para un total de 4 generos y 4 especies.
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Resurrection of the genus Neotrygon Castelnau (Myliobatoidei: Dasyatidae) with the description of Neotrygon picta sp.
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