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.
These conditions can lead to colon wall thickening because of the inflammation they produce in the tissue of the bowel. When any tissue is exposed to infection or irritation inflammation occurs. Inflammation is the term used to describe the swelling of affected tissue.