biology

Gyalopion canum

Gyalopion canum 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 Gyalopion canum rather than just read about it. In short: Gyalopion canum, commonly known as the Western hooknose snake, is a species of small colubrid snake endemic to the deserts of the United States and Mexico. It is sometimes referred to as the Chihuahuan hook-nosed snake because it is commonly found in the Chihuahuan Desert.

Key takeaways

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

Reference excerpt

Gyalopion canum, commonly known as the Western hooknose snake, is a species of small colubrid snake endemic to the deserts of the United States and Mexico. It is sometimes referred to as the Chihuahuan hook-nosed snake because it is commonly found in the Chihuahuan Desert.

Taxonomy The Western hooknose snake was originally described as a species new to science in 1860 by Edward Drinker Cope, who at that time named it Gyalopion canum. However, in 1883 Samuel Garman reassigned this species to the genus Ficimia, changing its scientific name to Ficimia cana. (Because Gyalopion is neuter, and Ficimia is feminine, the ending of the specific name had to be changed from "-um " to "-a "). After slightly more than 100 years, Robert C. Stebbins in 1985 returned this species to the genus Gyalopion, as Gyalopion canum, due to distinct morphological characteristics.

Geographic range G. canum is found in the United States, from western Texas to southeastern Arizona, and into northern and central Mexico.

Description The Western hooknose snake is a small species, growing to 36.5 cm (14+3⁄8 in) in total length (including tail). It is gray or grayish brown in color, with 25-48 dark brown or black blotches down the back, and a cream-colored underside. It has a slightly upturned snout, to which the common name, "hooknose", refers. The smooth dorsal scales are arranged in 17 rows at midbody.

Behavior G. canum is a nocturnal burrower, most often found under rocks.

Habitat The Western hooknose snake prefers slightly sandy habitats, near a permanent water source.

Diet The diet of G. canum consists primarily of spiders and centipedes, but it will also eat small snakes and scorpions.

Reproduction The Western hooknose snake is oviparous. Sexually mature females may lay up to 5 eggs in June.

Defense One of the primary defensive behaviors of G. canum is to make a popping noise with its cloaca, i.e., farting. According to an article in the August, 2000 issue of Discover magazine, during a laboratory experiment carried out by Bruce Young, a morphologist at Lafayette College, the snakes only farted when they felt threatened, and some farted so energetically that they lifted themselves off the ground.

Speed Gyalopion canum is quick in short bursts or spurts.

References

Further reading Conant R (1975). A Field Guide to Reptiles and Amphibians of Eastern and Central North America. Boston: Houghton Mifflin. xviii + 429 pp. + Plates 1-48. ISBN 0-395-19979-4 (hardcover), ISBN 0-395-19977-8 (paperback). (Gyalopion canum, p. 217 + Plate 33 + Map 161). Cope ED (1860). "Catalogue of the Colubridæ in the Museum of the Academy of Natural Sciences of Philadelphia, with notes and descriptions of new species, Part 2". Proc. Acad. Nat. Sci. Philadelphia 12: 241–266. (Gyalopion canum, new species, p. 243). Schmidt KP, Davis DD (1941). Field Book of Snakes of the United States and Canada. New York: G.P. Putnam's Sons. 365 pp. (Ficimia cana, pp. 202–203, Figure 65). Wright AH, Wright AA (1957). Handbook of Snakes of the United States and Canada. Ithaca and London: Comstock Publishing Assosciates, a division of Cornell University Press. 1,105 pp. (in 2 volumes). (Gyalopion canum, pp. 282–287, Figure 87, Map 26).

External links Species Gyalopion canum at The Reptile Database Herps of Texas: Gyalopion canum Archived 2000-08-29 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with Gyalopion canum

Start with the simplest possible case. Write down what Gyalopion canum 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 Gyalopion canum 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 Gyalopion canum 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 Gyalopion canum

In research: Gyalopion canum 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 Gyalopion canum 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: Gyalopion canum is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fauna of the Chihuahuan Desert, Gyalopion, IUCN Red List least concern species, so understanding it makes those chapters shorter.
In everyday life: Look for Gyalopion canum 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 Gyalopion canum in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Gyalopion canum 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 Gyalopion canum out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Gyalopion canum in simple terms?

Why does Gyalopion canum 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 Gyalopion canum?

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 Gyalopion canum.