Caecilia nigricans (Rio Lita caecilian)
Caecilia nigricans Boulenger, 1902
It is a robust, bluish lead-colored caecilian with the head slightly paler than the rest of the body. It differs from Caecilia leucocephala because the latter has fewer primary grooves and is smaller; in addition, the head is bluish gray in Caecilia nigricans and yellowish cream in Caecilia…
