Huaridelphis

Huaridelphis is an extinct genus of river dolphins from the Early Miocene. The type species is H. raimondii, found in the Chilcatay Formation of the Pisco Basin.

Etymology

The genus name is derived from the name of the Huari people, an ancient culture from Peru, and from the Latin word for "dolphin"; delphis. The specific name was chosen in honor of Antonio Raimondi, an Italian geographer and the first person to discover fossilized whale remains in Peru.

Description

H. raimondii was a relatively small squalodelphinid, with a bizygomatic breadth of and a condylobasal length of. The rostrum, which was only slightly dorsoventrally flattened, and made up only 67% of the condylobasal length, considerably less than most squalodelphinids. The antorbital notches were V-shaped and asymmetrical, with the right notch further back on the head than the left one. The species had 28-30 teeth per top row, with alveoli ranging in diameter between. Teeth ranged from high at the crown. Ribs measured around.

Discovery

Fossils of H. raimondii have been recovered from the Chilcatay Formation in Ullujaya and Zamaca, in the Ica Region of Peru.

Habitat

The specimens date from the Early Miocene. Specimens were found along with fossils of Isurus desori and Carcharocles chubutensis, as well as those of baleen whales, Teleostei, and sea turtles. Injuries, probably from sharks, were observed on at least two of the fossils.