Sources : Lincisius

Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Quadrupeds 4.61): Lincisius is a quadrupedal animal, as the Experimentator says in his book, produced from the mixture of dog and wolf; and this happens to the mother wolf and the father dog. For each parent is so desirous that, contrary to the natural hatred that exists between a dog and a wolf, they nevertheless come together in copulation because of the pleasure. And so it happens that the fetus attracts to itself the color and manners of both parents. The beasts are strong and fierce.- [Badke translation/paraphrase]

Albertus Magnus, De animalibus, 66 [circa 1200-1280 CE]: The lincisius is an animal born of a dog father and a wolf mother, and imitates the color and manners of both, and is fierce and very active.