science

Harrimaniidae

Harrimaniidae 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 Harrimaniidae rather than just read about it. In short: Harrimaniidae is a basal family of acorn worms. A taxonomic revision was undertaken in 2010, and a number of new genera and species found in the Eastern Pacific were described.

Key takeaways

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

Reference excerpt

Harrimaniidae is a basal family of acorn worms. A taxonomic revision was undertaken in 2010, and a number of new genera and species found in the Eastern Pacific were described. In this family the development is direct without tornaria larva, and circular muscle fibers in their trunk is missing. There is some indication that Stereobalanus may be a separate basal acorn worm lineage, sister to all remaining acorn worms.

Species The following genera and species are listed in the World Register of Marine Species:

Harrimania Ritter, 1900 Harrimania kupfferi (von Willemoes-Suhm, 1871) Harrimania maculosa Ritter, 1900 Harrimania planktophilus Cameron, 2002 Horstia Deland, Cameron, Rao, Ritter & Bullock, 2010 Horstia kincaidi Deland, Cameron, Rao, Ritter & Bullock, 2010 Meioglossus Worsaae, Sterrer, Kaul-Strehlow, Hay-Schmidt & Giribet, 2012 Meioglossus psammophilus Worsaae, Sterrer, Kaul-Strehlow, Hay-Schmidt & Giribet, 2012 Mesoglossus Deland, Cameron, Rao, Ritter & Bullock, 2010 Mesoglossus bournei (Menon, 1904) Mesoglossus caraibicus (van der Horst, 1924) Mesoglossus gurneyi (Robinson, 1927) Mesoglossus intermedius Deland, Cameron, Rao, Ritter & Bullock, 2010 Mesoglossus macginitiei Deland, Cameron, Rao, Ritter & Bullock, 2010 Mesoglossus pygmaeus (Hinrichs & Jacobi, 1938) Protoglossus van der Horst, 1935 Protoglossus graveolens Giray and King, 1996 Protoglossus koehleri (Caullery and Mesnil, 1900) Protoglossus taeniatum author unknown Ritteria Deland, Cameron, Rao, Ritter & Bullock, 2010 Ritteria ambigua Deland, Cameron, Rao, Ritter & Bullock, 2010 Saccoglossus Schimkewitsch, 1892 Saccoglossus apatensis Thomas, 1956 Saccoglossus aulakoeis Thomas, 1968 Saccoglossus borealis Okuda & Yamada, 1955 Saccoglossus bournei (Menon, 1904) Saccoglossus bromophenolosus King, Giray and Kornfield, 1994 Saccoglossus caraibicus (van der Horst, 1924) Saccoglossus gurneyi (Robinson, 1927) Saccoglossus horsti Brambell and Goodhart, 1941 Saccoglossus hwangtauensis Si & Kwang-Chung, 1935 Saccoglossus inhacensis van der Horst, 1934 Saccoglossus kowalevskii (Agassiz, 1873) Saccoglossus madrasensis Rao, 1957 Saccoglossus mereschkowskii (Wagner, 1885) Saccoglossus otagoensis (Benham, 1899) Saccoglossus pusillus (Ritter, 1902) Saccoglossus pygmaeus Hinrichs and Jacobi, 1938 Saccoglossus ruber Tattersall, 1905 Saccoglossus sulcatus (Spengel, 1893) Stereobalanus Spengel, 1901 Stereobalanus canadensis (Spengel, 1893) Stereobalanus willeyi Ritter, 1904 Xenopleura Gilchrist, 1925 Xenopleura vivipara Gilchrist, 1925

References

Worked examples

Example 1 — a first encounter with Harrimaniidae

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

In research: Harrimaniidae 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 Harrimaniidae 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: Harrimaniidae is common in secondary-school and first-year university syllabi. It links to neighbouring topics Acorn worms, Hemichordate stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Harrimaniidae 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 Harrimaniidae in 20 minutes

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

Frequently asked questions

What is Harrimaniidae in simple terms?

Harrimaniidae is a basal family of acorn worms. A taxonomic revision was undertaken in 2010, and a number of new genera and species found in the Eastern Pacific were described.

Why does Harrimaniidae 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 Harrimaniidae?

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 Harrimaniidae.