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Richard Harlan

Richard Harlan is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Richard Harlan rather than just read about it. In short: Richard Harlan (September 19, 1796 – September 30, 1843) was an American paleontologist, anatomist, and medical doctor. He was the first American to devote significant time and attention to vertebrate paleontology and was one of the most important contributors to the field in the early nineteenth century.

Richard Harlan — main illustration
Richard Harlan — illustration

Key takeaways

  • Richard Harlan belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Richard Harlan to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Richard Harlan from memory before moving on to harder problems.

Reference excerpt

Richard Harlan (September 19, 1796 – September 30, 1843) was an American paleontologist, anatomist, and medical doctor. He was the first American to devote significant time and attention to vertebrate paleontology and was one of the most important contributors to the field in the early nineteenth century. His work was noted for its focus on objective descriptions, taxonomy and nomenclature. He was the first American to routinely apply binomial Linnaean names to vertebrate and invertebrate fossils. Prior to the time of Harlan, it was common practice to publish only a genus name for a fossil animal that was new to science.

Biography Harlan was born in Philadelphia on September 19, 1796, to Joshua Harlan, a wealthy Quaker merchant, and his wife Sarah Hinchman Harlan, one of their ten children. He was three years older than his brother Josiah Harlan, who would become the first American to visit Afghanistan. Harlan graduated in medicine from the University of Pennsylvania in 1818 after taking time off during his studies to spend a year sailing to India as a ship's surgeon for the British East India Company. He worked briefly at the private medical school of Joseph Parish. He wrote a text on the human brain Anatomical Investigations (1824). In 1820, he was a physician at the Philadelphia Dispensary, where he worked with Philip Syng Physick. In 1822 he was elected professor of comparative anatomy at Charles Wilson Peale's Philadelphia Museum. One of his passions was the collection and study of human skulls. In 1822, he was elected as a member of the American Philosophical Society. At its peak, his collection contained 275 skulls, the largest such collection in America. In 1825 he published Fauna Americana, a catalogue of American mammals, including those known only from fossils. In 1832 he went to Montreal to study a cholera epidemic. Harlan also collected and received natural history specimens from a number of his friends and colleagues including Dr William Blanding (1773-1857), Samuel George Morton (1799-1851), and Samuel Wilson (and his son). He collaborated with other naturalists and supported Audubon during his travels. He described a number of species including Macroclemys temminckii, Harlan's ground sloth, Harlan's muskox and the Indian Hoolock gibbon. A parasite of the alligator snapping turtle is named after him Eimeria harlani. In 1833 he attended a meeting of the British Association for the Advancement of Science where he presented information on the fossil reptiles of America. He made an error in describing a species called Osteopera platycephala based on the skull of Agouti paca. He was criticized by his colleague from the Peale museum, John D. Godman (1794-1830), who wrote anonymously. In 1834, Harlan described and named Basilosaurus ("king lizard"), a genus of early whale, erroneously assuming he had found a Plesiosaurus-like dinosaur. In 1839 he visited Europe again and received a plaster copy of Mosasaurus hoffmannii from the Muséum d’Histoire Naturelle that is now in the Academy of Natural Sciences of Philadelphia. While in France he received news of a fire that had destroyed his collections. In 1842 he moved to New Orleans, Louisiana where he died of apoplexy a year later.

Works Harlan was the author of several books including:

Fauna Americana (1825) American Herpetology (1827) Medical and physical researches, or, Original memoirs in medicine, surgery, physiology, geology, zoology, and comparative anatomy (1835)

References

Further reading Gerstner, Patsy (1999). "Harlan, Richard". In Garraty, John A. (ed.). American National Biography. Oxford University Press. doi:10.1093/anb/9780198606697.article.1300697. Simpson, George Gaylord (1942). "The Beginnings of Vertebrate Paleontology in North America" (PDF). Proceedings of the American Philosophical Society. 86 (1): 130–188. Sterling, Keir B., ed. (1997). "Harlan, Richard". Biographical Dictionary of American and Canadian Naturalists and Environmentalists. Greenwood Press. Spamer, Earle E.; McCourt, Richard M. (2006). "Richard Harlan. Indefatigable collector". Discovering Lewis & Clark. Lewis and Clark Trail Heritage Foundation. Retrieved 2021-09-04. "Richard Harlan Journals". American Philosophical Society Library. American Philosophical Society.

Illustrations

Richard Harlan illustration

Worked examples

Example 1 — a first encounter with Richard Harlan

Start with the simplest possible case. Write down what Richard Harlan claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Richard Harlan before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Richard Harlan ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Richard Harlan

In research
Richard Harlan appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Richard Harlan in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Richard Harlan is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1796 births, 1843 deaths, 19th-century American zoologists, so understanding it makes those chapters shorter.
In everyday life
Look for Richard Harlan outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Richard Harlan in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Richard Harlan means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Richard Harlan out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Richard Harlan in simple terms?

Richard Harlan (September 19, 1796 – September 30, 1843) was an American paleontologist, anatomist, and medical doctor. He was the first American to devote significant time and attention to vertebrate paleontology and was one of the most important contributors to the field in the early nineteenth c…

Why does Richard Harlan matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Richard Harlan?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Richard Harlan.

Tags

  • 1796 births
  • 1843 deaths
  • 19th-century American zoologists
  • American herpetologists
  • American mammalogists
  • American taxonomists
  • Corresponding members of the Saint Petersburg Academy of Sciences
  • Deaths from bleeding
  • Medical doctors from Pennsylvania
  • Members of the American Philosophical Society
  • People from Chester County, Pennsylvania
  • Perelman School of Medicine at the University of Pennsylvania alumni

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