What are the characteristics of order Cetacea?
Order Cetacea
- Fusiform-shaped body.
- Large body size.
- Virtually hairless.
- Blubber.
- No sebaceous glands.
- Tails flattened dorso-ventrally into flukes.
- Forelimbs are modified into flippers.
- Vestigial hindlimbs.
What does the order Cetacea include?
The Order Cetacea is the group of marine mammals that includes the cetaceans – the whales, dolphins and porpoises.
What families are in the order Cetacea?
Families
- Balaenopteridae (blue whales, humpback whales)
- Delphinidae (dolphins, killer whales, pilot whales)
- Eschrichtiidae (gray whales)
- Iniidae (South American river dolphins)
What makes an animal a Cetacea?
cetacean, (order Cetacea), any member of an entirely aquatic group of mammals commonly known as whales, dolphins, and porpoises. The ancient Greeks recognized that cetaceans breathe air, give birth to live young, produce milk, and have hair—all features of mammals.
Where are Cetacea found?
While the majority of Cetaceans live in marine environments, a small number exclusively reside in brackish water or freshwater. Having a cosmopolitan distribution, they can be found in some rivers and all of earth’s oceans and many species inhabit vast ranges where they migrate with the changing of the seasons.
What are the 3 main types of Cetacea?
Cetaceans are divided into three main groups or sub-orders, one of which is extinct: the archaeoceti (the archaeocetes or ancient whales, which are extinct), mysticeti (the mysticetes or baleen whales) and odontoceti (the odontocetes or toothed whales).
Is Cetacea an order?
Even‑toed ungulatesTherapsid
Cetaceans/Order
How many marine mammal orders are there?
Three orders
Three orders of the class Mammalia contain marine mammals: Cetacea, Carnivora, and Sirenia.
Is lower decks canon?
Very mild spoilers ahead for Star Trek: Lower Decks Season 2. Although Lower Decks is first and foremost a comedy, the series takes its place in the Star Trek canon pretty seriously. And, if you’re a casual Trek fan, you may find that there are even more Easter eggs and deep-cuts in Season 2 than in Season 1.
Why does the Enterprise have dolphins?
The Star Trek: The Next Generation Technical Manual indicates that the dolphins were part of the Enterprise-D’s complement, serving as navigational specialists. This would indicate that they were, in fact, a sentient species.
What is common name for Cetacea?
Mysticeti (baleen whales or mysticetes – approximately 14 species) Odontceti (toothed whales or odontocetes – approximately 75 species)…
| Suborder Odontoceti (toothed whales or odontocetes) | ||
|---|---|---|
| Family | Scientific name | IWC Common name |
| Family Platanistidae | Platanista gangetica | Ganges river dolphin |
What is the largest order of marine mammals?
Results and Discussion. Marine mammals are a polyphyletic group that comprises 129 species grouped in three orders, Cetacea, Sirenia, and Carnivora (Table 1). The smallest marine mammal is the sea otter (1.15 m, 4.5 kg), and the biggest is the blue whale (30 m, 190 tons).
Is Star Trek Prodigy canon?
While the events of Prodigy seemed self-contained, all the new timeline revelations have opened up the series to the rest of Trek canon. Admiral Janeway and the crew of the USS Dauntless are rocking Lower Decks-style Starfleet uniforms, which makes sense within the context of 2383 since Lower Decks is set in 2381.
Is lower decks before Picard?
Lower Decks isn’t playing it safe. Set just after Voyager but before Picard, the comedic animated Star Trek series is back for a second season.
What is Cetacean Ops Star Trek?
What’s this “Cetacean Ops” they’re on about? Simply put, it’s an area aboard many Starfleet vessels where the ship’s navigation is assisted by crewmembers representing various cetacean species. From Earth, this usually means whales and bottlenose dolphins.
Were there whales on the enterprise?
The manual specifies that 12 bottlenose dolphins were aboard the Enterprise along with a pair of Takaya’s Whales who “supervised” the other animals. Presumably this involved warning them if they took too long for lunch.
What is the order Cetacea?
The Order Cetacea is the group of marine mammals that includes the cetaceans – the whales, dolphins and porpoises . There are 86 species of cetaceans, and these are divided into two suborders – the mysticetes ( baleen whales, 14 species) and odontocetes ( toothed whales, 72 species).
What are cetaceans and how did they evolve?
Cetaceans are thought to have evolved from even-toed ungulates (a group that includes cows, camels, and deer). There are many types of cetaceans, which are divided largely according to how they feed. The order Cetacea is divided into two sub-orders, the Mysticetes (baleen whales) and the Odontocetes ( toothed whales ).
What is the average size of a cetacean?
Cetaceans range in size from the tiniest dolphin, Hector’s dolphin, which is just over 39 inches long, to the largest whale, the blue whale, which can be over 100 feet long.
Why are cetaceans classified as mammals?
The ancient Greeks recognized that cetaceans breathe air, give birth to live young, produce milk, and have hair —all features of mammals. Because of their body form, however, cetaceans were commonly grouped with the fishes.