Potamotrygon rex | 水產百科網
PotamotrygonrexisendemictothemiddleandupperrioTocantins,havingbeencollectedfromitsmaincourseandlowerreachesofleftandrightbankaffluents, ...
descriptionDescription. Large stingray, with thick, fleshy disc in larger specimens. Disc more or less round to slightly oval, disc length about 1.0 – 1.1 times DW; greatest disc width just anterior to its mid-length; posterior disc not tapering significantly. Knob-like protuberance on anterior snout small, more apparent in smaller specimens. Anterior disc margin broadly convex; males with slightly more oval snout. Head broad, clearly protruding above disc. Eyes moderately-sized, bulging only slightly; eye diameter about one-fourth interorbital distance. Preorbital distance 22.5 – 29.6 % DW, greater than interorbital distance. Preorbital distance greater than preoral distance. Spiracles large, rhomboidal, greater than eyes, their length 5.5 – 7.8 % DW. Spiracles extending anterolaterally to about mid-length of eyes. Interspiracular distance slightly greater than interorbital distance. Nasal curtain trapez...
Potamotrygon rex | 水產百科網
Potamotrygon rex | 水產百科網
Potamotrygon rex | 水產百科網
Potamotrygon rex | 水產百科網
Potamotrygon rex | 水產百科網
Potamotrygon rex | 水產百科網
Potamotrygon rex | 水產百科網
【滿天星黑白魟Potamotrygon henlei】河魟科
水產分類:台灣常見的大陸水產品圖說中文名稱:滿天星黑白魟學名:Potamotrygonhenlei科別名稱:河魟科命名學者:(Castelnau1855)