Zygorhiza Whale Canine Tooth Fossil
$29.00
Zygorhiza kochii Whale is an extinct genus of basilosaurid early whale known from the Late Eocene of Louisiana, Alabama, and Mississippi, United States, and the Bortonian on the New Zealand geologic time scale) to the late Eocene of New Zealand.
- Description
- Additional information
Description
Zygorhiza Whale Canine Tooth Fossil Replica measures 4.1 inches. Zygorhiza Whale Tooth Fossil is museum quality polyurethane cast. Made in USA. Zygorhiza kochii is the scientific name. Our precise Canine tooth can be used as a teaching tool, museum canine exhibit, home décor canine, or office décor canine.
Zygorhiza Whale or Zygorhiza kochii is an extinct genus of basilosaurid early whale known from the Late Eocene of Louisiana, Alabama, and Mississippi, United States, and the Bortonian to the late Eocene of New Zealand (43 to 33.9 million years ago).
Basilosaurus had a body similar in cetaceans with flipper-like forelimbs, rudimentary hind limbs, a vertebral column adapted for oscillatory swimming, and a tail fluke. The Zygorhiza kochii replaced their upper and lower deciduous first premolars with permanent teeth. This is very unusual in modern mammals and contrasts to extant toothed whales that only develop a single set of teeth.
It might indicate that Zygorhiza or Zygorhiza kochii represents a stage in archaeocete evolution where skeletal maturation was delayed like in modern cetaceans. Zygorhiza Whale differs from all other dorudontines in the presence of well-developed cuspules on the cingula of the upper premolars.
In the U.S., Zygorhiza Whale or Zygorhiza kochii is known from the Gulf Coast, whilst Dorudon is known from southeastern Atlantic Coast. Outside North America, the Zygorhiza Whale has only been reliably identified in New Zealand, whereas Dorudon only in Egypt. It is possible that these non-overlapping distributions indicate differences in habitat preferences.
Zygorhiza kochii skull is elongated with a narrow rostrum and a flattened forehead; the premaxillae are laterally convex. The high sagittal crest is flanked by two large temporal fossae, resulting in a narrow intertemporal region.
The Zygorhiza Whale or Zygorhiza kochii hyoid apparatus consists of a small, central, and hexagonal basihyoid bone. From this bone project a pair of thyrohyoid bones (homologous with the greater cornua in humans) that are slightly expanded anteriorly and tapper off posteriorly, and another pair of slender and elongated bones, the epihyoid and stylohyoid bones.
Zygorhiza Whale Facts:
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Family: †Basilosauridae
Subfamily: †Dorudontinae
Genus: †Zygorhiza
Species: †Z. kochii
Binomial name: †Zygorhiza kochii
Shop More Museum Quality Whale Skulls in Whale Skull Store
Additional information
Weight | 3 lbs |
---|---|
Dimensions | 4.1 in |
World Whale Day - 3rd Sunday of February | World Whale Day is celebrated on the third Sunday of February each year to recognize whales and raise awareness of the threats they face. The day began in Maui, Hawaii in 1980 to honor the humpback whales that migrate to the islands each winter to give birth. The Pacific Whale Foundation organizes events that include parades, activities for children, and fun characters. |