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Sirenoidea
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Mamba. Black mamba snake in a tree in South Africa. The best known Mamba is the black mamba, D. polylepis (Dendroaspis polylepis). Among deadliest of the world's snakes.
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Sirenoidea

amphibian suborder
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The suborder Sirenoidea refers to a group of amphibians that are characterized by having only an anterior pair of limbs, external gills, and being aquatic. This group includes the family Sirenidae, commonly known as sirens and dwarf sirens. These amphibians, which can range from small to very large, are predators found in lowland waters. Their fossil record dates back to the Late Cretaceous period.1

It is important to note that the term "Sirenoidea" can also refer to a group of lungfishes, distinct from the amphibian suborder. Additionally, the order Sirenia, which includes manatees and dugongs, shares a similar name but refers to aquatic mammals, not amphibians.234

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
4 Britannica Sources
  1. sirenian
  2. Caudata - Annotated classification
  3. Sirenoidei
  4. Sirenia

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