▁Oxford ▁Category : M embers ▁of ▁Do ctors ' ▁Commons ▁Category : Year ▁of ▁birth ▁unknown <0x0A> </s> ▁U rog ymn us ▁is ▁a ▁genus ▁of ▁st ing ray s ▁in ▁the ▁family ▁Das y at idae ▁from ▁marine , ▁bra ck ish ▁and ▁fresh water ▁habit ats ▁in ▁the ▁Ind o - P ac ific ▁and ▁tropical ▁East ▁Atlantic ▁regions . ▁The ▁genus ▁was ▁previously ▁considered ▁to ▁be ▁monot yp ic , ▁containing ▁only ▁the ▁por cup ine ▁ray ▁( U . ▁as per rim us ). ▁M ole cular ▁ph y log en etic ▁research ▁published ▁in ▁ 2 0 1 6 ▁re ass igned ▁several ▁species ▁from ▁Him ant ura ▁to ▁U rog ymn us . ▁ ▁Species ▁ ▁U rog ymn us ▁ac anth ob oth rium ▁Last , ▁White ▁& ▁Ky ne , ▁ 2 0 1 6 ▁( M umb ur arr ▁wh ip ray ) ▁ ▁U rog ymn us ▁as per rim us ▁( B lo ch ▁& ▁Schne ider , ▁ 1 8 0 1 ) ▁( P or cup ine ▁ray ) ▁ ▁U rog ymn us ▁dal y ensis ▁( Last ▁& ▁Man j aj i - M ats um oto , ▁ 2 0 0 8 ) ▁( F resh water ▁wh ip ray ) ▁ ▁U rog ymn us ▁gran ul atus ▁( M acle ay , ▁ 1 8 8 3 ) ▁( M ang ro ve ▁wh ip ray ) ▁ ▁U rog ymn us ▁lo b ist