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.
Yes: The kidney is covered in a very thick piece of skin that doesn't like to be stretched - when stone blocks urine flow the kidney can swell a bit and push on this skin. This is what triggers nausea/vomiting/pain.