earth science

Jujubinus exasperatus

Jujubinus exasperatus is a earth 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 Jujubinus exasperatus rather than just read about it. In short: Jujubinus exasperatus, the Rough Top Shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Description Jujubinus exasperatus has a shell which can reach an adult size of 7–15 millimetres (0.28–0.59 in).

Key takeaways

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

Reference excerpt

Jujubinus exasperatus, the Rough Top Shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

Description

Jujubinus exasperatus has a shell which can reach an adult size of 7–15 millimetres (0.28–0.59 in). The shape of this shell is conical, with straight sides and a flat imperforate base with ca. 6 spiral cords which are smoother than on the whorls. The sides show four-five beaded cords. These are narrower than the interspaces in which there are very fine, prosocline lamellae. A considerably thicker compound cord is seen above the suture on the spire and at the periphery of body whorl. The aperture is subquadrangular, with a moderate denticle at the base of the columella. The outer lip has a cutting edge. The background color of the first whorls is typically reddish, the later whorls usually whitish with red, brown or (more rarely) black flames. The peripheral cord is usually articulated with red and white. The apex is pink. Interior of aperture is nacreous. This sea snail is herbivorous, feeding on algae.

Distribution This species occurs in Eastern Atlantic, from the British islands to Portugal and Morocco and in the Mediterranean Sea, mainly in Spain, Italy, Greece. It is common in the seagrass prairies of Posidonia oceanica, at depths of 0 to 30 m.

References

Further reading Gmelin J. F., 1791: Carli Linnaei systema Naturae per regna tria naturae. Editio decimatertia, aucta, reformata, Vermes Testacea; Leipzig [Lipsiae] 1 (6): 3021–3910 [molluschi]. Pulteney R., 1799: Catalogue of the birds, shells, and some of the more rare plants of Dorsetshire; London, Nichols pp. 92 Brocchi G. B., 1814: Conchiologia fossile subappenninica con osservazioni geologiche sugli Appennini e sul suolo adiacente; Milano Vol. I: pp. LXXX + 56 + 240. Vol. II: pp. 241–712. Con 16 tavole Lamarck ([J.-B. M.] de), 1815–1822: Histoire naturelle des animaux sans vertèbres; Paris [vol. 5: Paris, Deterville/Verdière] [vol. 6 published by the Author] 7 vol. [I molluschi sono compresi nei vol. 5–7. Vol. 5 (Les Conchiferes): 612 pp. [25 luglio 1818]. Vol. 6 (1) (Suite): 343 pp. [1819]. Vol. 6 (2) (Suite): 232 pp. [1822]. Vol. 7: (Suite): 711 pp. 1822 Payraudeau B. C., 1826: Catalogue descriptif et méthodique des Annelides et des Mollusques de l'île de Corse; Paris pp. 218 + 8 pl. Risso A., 1826–1827: Histoire naturelle des principales productions de l'Europe Méridionale et particulièrement de celles des environs de Nice et des Alpes Maritimes; Paris, Levrault Vol. 1: XII + 448 + 1 carta [1826]. Vol. 2: VII + 482 + 8 pl. (fiori) [novembre 1827]. Vol. 3: XVI + 480 + 14 pl. (pesci) [settembre 1827]. Vol. 4: IV + 439 + 12 pl. (molluschi) [novembre 1826]. Vol. 5: VIII + 400 + 10 pl. (altri invertebrati) Blainville H. M. (D. de), 1828–1830: Malacozoaires ou Animaux Mollusques. [in] Faune Française; Levrault, Paris 320 p., 48 pl. [livr. 18 (1828) p. 1–80; livr. 2 (1829) p. 81–176; livr. 23 (1829) p. 177–240; livr. 28 (1830) p. 241–320] Aradas A. & Maggiore G., 1841?: Sunto di quattro memorie malacologiche... Monografia del genere Eulima dal Sig. Risso per la fauna Siciliana. Monografia del genere Orthostelis. Monografia del genere Maravignia. Descrizione di due nuove specie siciliane del genere Trochus; Giornale del Gabinetto Gioenio 6(3): 1–10 [Philippi (1844: 225) Monterosato T. A. (di), 1880: Notizie intorno ad alcune conchiglie delle coste d'Africa; Bullettino della Società Malacologica Italiana, Pisa 5: 213–233 Monterosato T. A. (di), 1884: Nomenclatura generica e specifica di alcune conchiglie mediterranee; Palermo, Virzi pp. 152 Bucquoy E., Dautzenberg P. & Dollfus G., 1882–1886: Les mollusques marins du Roussillon. Tome Ier. Gastropodes.; Paris, J.B. Baillière & fils 570 p., 66 pl. Sturany R., 1896: Zoologische Ergebnisse VII. Mollusken I (Prosobranchier und Opisthobranchier; Scaphopoden; Lamellibranchier) gesammelt von S.M. Schiff "Pola" 1890–1894.; Denkschriften der Kaiserlichen Akademie der Wissenschaften, Mathematische-Naturwissenschaftlischen Classe 63: 1–36, pl.1-2 Pallary P., 1900: Coquilles marines du littoral du Département d'Oran; Journal de Conchyliologie 48 (3): 211–422, pl. 6–8 Coen G., 1933: Saggio di una Sylloge Molluscorum Adriaticorum; Memorie del Regio Comitato Talassografico Italiano 192: pp. i–vii, 1–186 Ghisotti F. & Melone G., 1969–1975: Catalogo illustrato delle conchiglie marine del Mediterraneo Conchiglie Part 1: suppl. 5 (11–12): 1–28 [1969]. Part 2: suppl. 6 (3–4): 29–46 [1970]. Part 3: suppl. 7 (1–2): 47–77 [1971]. Part 4. suppl. 8 (11–12): 79–144 [1972]. Part 5. suppl. 11 (11–12): 147–208 [1975] Arnaud, P., 1978: Révision des taxa malacologiques méditerranens introduits par Antoine Risso; Annales du Muséum d'Histoire Naturelle de Nice 5: 101–150

External links PESI "Jujubinus exasperatus exasperatus". Gastropods.com. Retrieved 16 January 2019.

Illustrations

Worked examples

Example 1 — a first encounter with Jujubinus exasperatus

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

In research: Jujubinus exasperatus appears in earth 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 Jujubinus exasperatus 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: Jujubinus exasperatus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gastropods described in 1777, Jujubinus, Molluscs of the Atlantic Ocean, so understanding it makes those chapters shorter.
In everyday life: Look for Jujubinus exasperatus 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 Jujubinus exasperatus in 20 minutes

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

Frequently asked questions

What is Jujubinus exasperatus in simple terms?

Jujubinus exasperatus, the Rough Top Shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Description Jujubinus exasperatus has a shell which can reach an adult size of 7–15 millimetres (0.28–0.59 in).

Why does Jujubinus exasperatus matter?

Because it connects several earth 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 Jujubinus exasperatus?

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 Jujubinus exasperatus.