science

Neolissochilus pnar

Neolissochilus pnar is a science 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 Neolissochilus pnar rather than just read about it. In short: Neolissochilus pnar is a species of subterranean cyprinid in the genus Neolissochilus. It is the largest known subterranean fish, a title formerly held by the blind cave eel.

Key takeaways

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

Reference excerpt

Neolissochilus pnar is a species of subterranean cyprinid in the genus Neolissochilus. It is the largest known subterranean fish, a title formerly held by the blind cave eel.

Discovery and naming N. pnar was first observed in the 1990s, and only collected and photographed for study in 2019. However stories of 'white cavefish' within the Siju Caves in the Garo Hills of Meghalaya have been documented for a century and suggested to be slightly decolorized specimens of Neolissochilus hexastichus which appeared white when seen in water under torch light. It was tentatively identified as a troglobitic form of golden mahseer, but more detailed analyses have found it to belong in the genus Neolissochilus. The specific name pnar honors the sub-tribal group of the Khasi people in the state of Meghalaya of the same name.

Description The holotype specimen of N. pnar is 329.2 mm (12.96 in) long, & the largest individual sighted in its natural cave habitat exceeded 400 mm (16 in) in standard length, making this species the largest known subterranean fish. The head of this fish is large, accounting for a bit over a quarter of its length, and has two pairs of barbels. All fins of N. pnar are hyaline and translucent. This species is white or pinkish in color, with no pigmentation from melanophores. The eye size in this species reduces as overall body size increases: in the largest individuals they cannot be discerned without very close inspection, whilst the eyes of smaller juveniles are clearly visible large dark spots under the skin surface. N. pnar has a continuous lateral lines with 28–31 perforated scales, as well as an additional 1–2 on the caudal fin base. The species' mitogenome is 16440 base pairs long.

Ecology and habitat N. pnar has been collected from the Krem Um Ladaw and the adjacent Krem Chympe caves in Meghalaya, Northeast India, which drain into the Meghna River System. The entrance to the Krem Um Ladaw cave lies in a seasonally dry stream bed within a forest, and the cave floor is rocky with several pools of standing water. Forest vegetation make up part of the debris along the floor, indicating the cave is seasonally flooded, & this seasonal flood debris may provide the main food source for the fish. No major bat roosts or bat guano deposits are present in Krem Um Ladaw, but there are various invertebrates including brown crickets (Eutachycines sp.), cellar spiders (Pholcidae), fungus gnat larvae (Keroplatidae), isopods such as Cubaris sp. and Philoscia sp., shrimp (Macrobrachium cf. cavernicola), snails (Paludomus sp.), pond skaters (Gerridae), and a few tadpoles. In the Krem Chympe cave, N. pnar occurs in pools in a side passage alongside fish (Garra sp.), shrimps (Macrobrachium sp.), and tadpoles.

References

Invention story in details

Illustrations

Worked examples

Example 1 — a first encounter with Neolissochilus pnar

Start with the simplest possible case. Write down what Neolissochilus pnar claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Neolissochilus pnar 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 Neolissochilus pnar 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 Neolissochilus pnar

In research: Neolissochilus pnar appears in science 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 Neolissochilus pnar 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: Neolissochilus pnar is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cave fish, Cyprinid fish of Asia, Fish described in 2023, so understanding it makes those chapters shorter.
In everyday life: Look for Neolissochilus pnar 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 Neolissochilus pnar in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Neolissochilus pnar 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.
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Frequently asked questions

What is Neolissochilus pnar in simple terms?

Neolissochilus pnar is a species of subterranean cyprinid in the genus Neolissochilus. It is the largest known subterranean fish, a title formerly held by the blind cave eel.

Why does Neolissochilus pnar matter?

Because it connects several science 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 Neolissochilus pnar?

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 Neolissochilus pnar.