The noun A. TESTUDINEUS has 1 sense: 1. a small perch of India whose gills are modified to allow it to breathe air; has spiny pectoral fins that enable it to travel on land. Familiarity information: A. TESTUDINEUS used as a noun is very rare. Dictionary entry details.
If the urine appears thick or has granules in it I'd suspect bladder stones/crystals or infection. The bright yellow color can sometimes indicate a liver or gallbladder problem.
If your dog does not exhibit any unusual behaviour like signs of discomfort but only passes small volumes of strong smelling urine, it is possible that he is lacking in fluids or hydration. In this case the urine looks thick and dark yellow as it is concentrated.