- Llanocetus denticrenatus
- Mitchell, 1989
- Meaning of generic name
- in honor of Dr. George A. Llano and cetus (L.) whale
- Meaning of specific name
- "crenated teeth"
- Skull length: 2 m, Length: [not given]
- Holotype (USNM 183022): a fragmentary mandible with two cheek teeth.
Referred specimens: a complete skull endocast and other bone fragments.
- Age and Distribution
- Horizon: Upper part (Unit III) of the La Meseta Formation. Late Eocene (Priabonian).
Locality: Seymour Island, Antarctica.
- Mammalia Cetacea Mysticeti Llanocetidae
- Further Reading
- E. D. Mitchell. 1989. A new cetacean from the late Eocene La Meseta Formation, Seymour Island, Antarctic Peninsula. Canadian Journal of Fisheries and Aquatic Sciences 46(12):2219-2235.
Monday, 2 December 2013
Llanocetus was an early member of the baleen whale group (Mysticeti) but had teeth instead of baleen. It is known from a fragmentary mandible found on Seymour Island during an Argentine-American expedition in 1974-1975. It lived alongside advanced members of the archaeoceti whales (Dorudontidae) as well as primitive penguins during the Late Eocene period. With an estimated skull length of 2 m, it was a pretty large whale. A more complete fossil has also been excavated but its description has apparently not been published yet.