biology

Trimeresurus hageni

Trimeresurus hageni 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 Trimeresurus hageni rather than just read about it. In short: Trimeresurus hageni, commonly known as Hagen's pit viper and Hagen's green pit viper, is a species of venomous snake in the subfamily Crotalinae of the family Viperidae. The species is native to Southeast Asia.

Key takeaways

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

Reference excerpt

Trimeresurus hageni, commonly known as Hagen's pit viper and Hagen's green pit viper, is a species of venomous snake in the subfamily Crotalinae of the family Viperidae. The species is native to Southeast Asia. There are no subspecies that are recognized as being valid.

Etymology The specific name, hageni, is in honor of German naturalist Dr. Bernhard Hagen, who collected mammals, birds, reptiles, and insects in the eastern part of Sumatra.

Description

Scalation of T. hageni includes 21 rows of dorsal scales at midbody, 176–198 ventral scales, 63–89 subcaudal scales, and 9–12 supralabial scales. The lectotype has a total length (including tail) of 97 cm (38 in).

Geographic range T. hageni is found in Peninsular Thailand, Peninsular Malaysia, East Malaysia (Borneo), and Indonesia (Sumatra and the nearby islands of Bangka, Simalur, Nias, Batu, and the Mentawai Islands). The type locality given is "Sumatra ... [and] island of Banka". Brongersma (1933) emended this to "Deli, Sumatra".

Habitat The preferred natural habitat of T. hageni is forest, at altitudes of 100–300 m (330–980 ft).

Behavior T. hageni is arboreal and nocturnal.

Diet T. hageni preys upon amphibians and lizards.

Reproduction T. hageni is oviparous.

References

Further reading Brongersma LD (1933). "Herpetological Notes I-IX". Zoologische Mededeelingen (Leiden) 16: 1-29. (Trimeresurus hageni, new combination). Das I (2012). A Naturalist's Guide to the Snakes of South-East Asia: Malaysia, Singapore, Thailand, Myanmar, Borneo, Sumatra, Java and Bali. Oxford, England: John Beaufoy Publishing. 176 pp. ISBN 978-1906780708. Lidth de Jeude, Th. W. van (1886). "On Cophias Wagleri Boie and Coluber sumatranus Raffles". Notes from the Leyden Museum 8 (10): 43–54. ("Bothrops Hageni", new species, pp. 53–54). Sanders KL, Malhotra A, Thorpe RS (2002). "A contribution to the systematics of two commonly confused pitvipers from the Sunda Region: Trimeresurus hageni and T. sumatranus ". Bulletin of the Natural History Museum London (Zoology Series) 68 (2): 107–111.

Illustrations

Worked examples

Example 1 — a first encounter with Trimeresurus hageni

Start with the simplest possible case. Write down what Trimeresurus hageni 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 Trimeresurus hageni 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 Trimeresurus hageni 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 Trimeresurus hageni

In research: Trimeresurus hageni 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 Trimeresurus hageni 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: Trimeresurus hageni is common in secondary-school and first-year university syllabi. It links to neighbouring topics IUCN Red List least concern species, Reptiles described in 1886, Reptiles of Borneo, so understanding it makes those chapters shorter.
In everyday life: Look for Trimeresurus hageni 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Trimeresurus hageni” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Trimeresurus hageni in 20 minutes

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

Frequently asked questions

What is Trimeresurus hageni in simple terms?

Why does Trimeresurus hageni 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 Trimeresurus hageni?

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 Trimeresurus hageni.