biology

Latia

Latia 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 Latia rather than just read about it. In short: Latia is a genus of very small, air-breathing freshwater snails or limpets, aquatic pulmonate gastropod molluscs in the superfamily Chilinoidea. Latia is the only genus in the family Latiidae.

Key takeaways

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

Reference excerpt

Latia is a genus of very small, air-breathing freshwater snails or limpets, aquatic pulmonate gastropod molluscs in the superfamily Chilinoidea. Latia is the only genus in the family Latiidae. Species in this genus are the only freshwater bioluminescent molluscs in the world.

Taxonomy The family Latiidae has been classified within the superfamily Chilinoidea, itself belonging to the clade Hygrophila within the informal group Basommatophora in the informal group Pulmonata (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). There are no subfamilies in the family Latiidae (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Latia is the only genus in the family Latiidae, in other words Latiidae is a monotypic family and Latia is the type genus of the family Latiidae. This genus was previously placed instead in a larger family of freshwater limpets, the Ancylidae.

Distribution This genus is endemic to the North Island of New Zealand.

Habitat This genus lives in clean running streams and rivers.

Shell description Shell is ancyliform, with the apex marginal, and situated at the left posterior side, incurved, small. Aperture is very large, oval. The margin of the aperture is thin and sharp; posteriorly with a narrow, thin, concave lamina, its right edge bent down and free, forming a thin and sharp-edged vertical lamella.

Anatomy This genus is remarkable by the absence of a jaw. Animal has eyes at the outer bases of the tentacles. The foot is elongated oval. The pulmonary cavity, its opening on the right side. Visceral commissure is long. There is no jaw. Central tooth of radula is bicuspidate, laterals are unicuspidate and marginals are tricuspidate.

Life habits These freshwater limpets are capable of secreting a bioluminescent substance when disturbed. Theories vary as to the purpose of the bioluminescence, but indicate it is a defence mechanism. One theory is that when disturbed by a predator, Latia release the bioluminescent slime, and the predator chases the light rather than the snail. Another theory is that the slime will attach to the predator causing confusion and alarm, or indeed, making the predator vulnerable and visible to other nocturnal predators. As the Latia release the slime when feeling threatened, it is conceivable Latia could be used as a monitor for illegal pollution dumping or other water quality issues.

Species Species in the genus Latia include:

Latia climoi Starobogatov, 1986 Latia lateralis (Gould, 1852) † Latia manuherikia Marshall, 2011 - from the Early–Middle Miocene Latia neritoides Gray, 1850 - type species (type by monotypy)

Notes

References This article incorporates public domain text from the reference

Marshall, B.A. (2011). A new species of Latia Gray, 1850 (Gastropoda: Pulmonata: Hygrophila: Chilinoidea: Latiidae) from Miocene palaeo-lake Manuherikia, southern New Zealand, and biogeographic implications. Molluscan Research 31 (1): 47–52.

External links

Radio interview with scientist Stella McQueen discussing Latia

Illustrations

Worked examples

Example 1 — a first encounter with Latia

Start with the simplest possible case. Write down what Latia 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 Latia 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 Latia 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 Latia

In research: Latia 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 Latia 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: Latia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bioluminescent molluscs, Gastropod genera, Latia, so understanding it makes those chapters shorter.
In everyday life: Look for Latia 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 Latia in 20 minutes

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

Frequently asked questions

What is Latia in simple terms?

Latia is a genus of very small, air-breathing freshwater snails or limpets, aquatic pulmonate gastropod molluscs in the superfamily Chilinoidea. Latia is the only genus in the family Latiidae.

Why does Latia 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 Latia?

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 Latia.