fungus India Kanangi Karkala karnataka leathery poroid mushrooms mushroom Polypore rotting logs Western Ghats brown consume earthy feed grow rot brackish-water turtle Designs diamondback freshwater leathery markings neckfold patterns reddish reptile reptilian shell terrapin texture turtle wiggly aging endurable Galapagos tortoise giant tortoise heavy herbivore large longevity old plodder plodding slow and steady tortoise tough wisdom wise abstract appearance armor armored armorment armour armoured armourment carapace shape shaped textured water wet bright forest jungle monsoon orange rain forest striped stripes yellow yellow-stripes