Is Cetacea an order or infraorder?

Even-toed ungulates
Therapsid
Cetaceans/Order

Which of the following example belongs to the order Cetacea?

Cetaceans (order Cetacea) are an entirely aquatic order of mammals comprising the whales, the dolphins, and the porpoises.

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).

What is a cetacean species?

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.

Is Cetacea an order?

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 classification is Cetacea?

How many species are there in Cetacea?

90 species
Cetacea is the scientific term for the group of marine mammals that includes whales, dolphins and porpoises. There are over 90 species of cetaceans that inhabit the world’s oceans, lakes and rivers according to the World Cetacean Database (2016).

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)

Which of the following animals are included in Cetacea?

This group, which includes all the animals commonly known as whales, dolphins and porpoises, has two main branches, the suborder Mysticeti of baleen whales, and the suborder Odontoceti of toothed whales.

How many species are in the order Cetacea?

86 species
The Cetacea (whales, dolphins and porpoises) currently include 86 species that inhabit the world’s oceans, lakes and rivers.

What order is Cetacea in?

What is the order Cetacea?

The order Cetacea are marine mammals that live in oceans, seas, and even a few rivers around the world. Whales, dolphins, and porpoises are part of this group.

How many species of whales are there in Cetacea?

Wikimedia list article. Cetacea is an infraorder that comprises the 89 species of whales, dolphins, and porpoises. It is divided into toothed whales (Odontoceti) and baleen whales (Mysticeti), which diverged from each other some time in the Eocene 26 to 17 million years ago (mya).

What are the closest living relatives of cetaceans?

Cetaceans belong to the order Cetartiodactyla (formed by combining Cetacea + Artiodactyla) and their closest living relatives are hippopotamuses and other hoofed mammals (camels, pigs, and ruminants), having diverged about 50 million years ago.

What is the evolutionary history of cetaceans?

The evolutionary history of cetaceans is thought to have occurred in the Indian subcontinent from even-toed ungulates 50 million years ago, over a period of at least 15 million years. Cetaceans are fully aquatic marine mammals belonging to the order Artiodactyla, and branched off from other artiodactyls around 50 mya (million years ago).