Skip to main content


Rhinocerotoidea (order Perissodactyla, suborder Ceratomorpha) A superfamily that comprises the rhinoceroses and their relatives, grouped into the families Hyracodontidae, Amynodontidae, and Rhinocerotidae. They are believed to have evolved from tapir-like forms and throughout most of the Tertiary they were abundant over most of the northern hemisphere. Many developed horns (the name is derived from the Greek rhino-, ‘nose’, and keras, ‘horn’) made from fused hair, and many attained large size, with short legs. Early forms possessed five digits, later forms four and then three, but no member of the superfamily has possessed fewer than three. The digits have nail-like hoofs. The brain is small, eyesight is poor, the most highly developed senses being those of scent and hearing. They are mainly nocturnal, solitary, and timid. Some graze in small herds.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Rhinocerotoidea." A Dictionary of Zoology. . 21 Mar. 2019 <>.

"Rhinocerotoidea." A Dictionary of Zoology. . (March 21, 2019).

"Rhinocerotoidea." A Dictionary of Zoology. . Retrieved March 21, 2019 from

Learn more about citation styles

Citation styles gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, cannot guarantee each citation it generates. Therefore, it’s best to use citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

The Chicago Manual of Style

American Psychological Association

  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.