These protrusions tend towards the top of the auricle. Sideburns may not reach under the middle of each auricle. The helix is the prominent rim of the auricle. Small blisters appear on skin of eternal auditory canal and auricle. By histologic examination, it is a recapitulation of normal external auricle. This has been tagged and coined Darwin's tubercle of the auricle. Congenital malformation of heart&colon; abnormal septum in left auricle. Developmentally anotia/microtia occurs when certain tissues associated with the auricle do not develop. Upon the pharyngeal arches Auricle Hillocks begin to form. The Auricle (anatomy), also known as the pinna is a rabbit's outer ear. The thrombus generally forms in the left atrium, most commonly the left auricle. The auricle, ear canal, and tympanic membrane are often referred to as the external ear. The auricle at the base of the cotyledon leaf is pointed and measures long. The sensory fossae and the auricle grooves are supplied with many nerve endings. It enters the right auricle at the lower right, back side of the heart.