earth science

Stramonita haemastoma

Stramonita haemastoma 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 Stramonita haemastoma rather than just read about it. In short: Stramonita haemastoma, common name the red-mouthed rock shell or the Florida dog winkle, is a species of predatory sea snail, a marine gastropod mollusc in the family Muricidae, the rock snails. Subspecies Stramonita haemastoma contains the following subspecies: Stramonita haemastoma canaliculata (Gray, 1839): synonym of Stramonita canaliculata (Gray, 1839) Stramonita haemastoma floridana (Conrad, 1837): synonym of…

Key takeaways

Stramonita haemastoma 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 Stramonita haemastoma to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Stramonita haemastoma from memory before moving on to harder problems.

Reference excerpt

Stramonita haemastoma, common name the red-mouthed rock shell or the Florida dog winkle, is a species of predatory sea snail, a marine gastropod mollusc in the family Muricidae, the rock snails.

Subspecies Stramonita haemastoma contains the following subspecies:

Stramonita haemastoma canaliculata (Gray, 1839): synonym of Stramonita canaliculata (Gray, 1839) Stramonita haemastoma floridana (Conrad, 1837): synonym of Stramonita floridana (Conrad, 1837) (unaccepted rank) Stramonita haemastoma haemastoma (Linnaeus, 1767): synonym of Stramonita haemastoma (Linnaeus, 1767)

Distribution The red-mouthed rock shell occurs widely in tropical and warm water areas of the Western Atlantic Ocean. Regions where it can be found include the Caribbean Sea, North Carolina and Florida, Bermuda and the entire Brazilian coast, including the islands of Abrolhos and Fernando de Noronha. It is also found in the Eastern Atlantic: tropical Western Africa and Southwestern Africa, including Cape Verde and Angola, and in European waters, including Macaronesian Islands, the Mediterranean Sea and the southwest coast of Apulia. Its once abundant population in the Eastern Mediterranean collapsed early in the 21st century and had entirely disappeared by 2016.

Description

The adult shell size for this species varies between 22 mm and 120 mm.

Feeding habits Stramonita haemastoma is a widespread gastropod that consumes bivalves, barnacles and limpets. In the Mediterranean Sea the whelk is an important predator of the bivalve Mytilaster minimus, but where the invasive Lessepsian migrant bivalve Brachidontes pharaonis is found, the whelk prefers to prey on that species over the native bivalves and barnacles. Through feeding behaviors such as attacking the margin or lip of shells where defenses are weakest, Stramonita haemastoma insert its proboscid between the valves injecting proteolytic enzymes and a toxin that causes bivalves to gape.

Human use

The shell was one of two principal sources of Tyrian purple, a highly prized dye used in classical times for the clothing of royalty, as recorded by Aristotle and Pliny the Elder.

References

Further reading Bernard, P.A. (Ed.) (1984). Coquillages du Gabon [Shells of Gabon]. Pierre A. Bernard: Libreville, Gabon. 140, 75 plates Gofas, S.; Afonso, J.P.; Brandào, M. (Ed.). (S.a.). Conchas e Moluscos de Angola = Coquillages et Mollusques d'Angola. [Shells and molluscs of Angola]. Universidade Agostinho / Elf Aquitaine Angola: Angola. 140 pp Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213 Rolán E., 2005. Malacological Fauna From The Cape Verde Archipelago. Part 1, Polyplacophora and Gastropoda Rosenberg, G., F. Moretzsohn, and E. F. García. 2009. Gastropoda (Mollusca) of the Gulf of Mexico, Pp. 579–699 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas. Ramírez R., Tuya F. & Haroun R. J. (2009) "Spatial patterns in the population structure of the whelk Stramonita haemastoma (Linnaeus, 1766) (Gastropoda: Muricidae) in the Canarian Archipelago (eastern Atlantic)". Scientia Marina 73(3) doi:10.3989/scimar.2009.73n3431 Claremont M., Williams S.T., Barraclough T.G. & Reid D.G. (2011) The geographic scale of speciation in a marine snail with high dispersal potential. Journal of Biogeography 38: 1016-1032. Claremont M., Vermeij G.J., Williams S.T. & Reid D.G. (2013) Global phylogeny and new classification of the Rapaninae (Gastropoda: Muricidae), dominant molluscan predators on tropical rocky seashores. Molecular Phylogenetics and Evolution 66: 91–102. Scheltema R. (1971). Larval dispersal as a means of genetic exchange between geographically separated populations of shallow-water benthic marine Gastropods. Biological Bulletin 140: 284-322 Garrigues B. & Lamy D. (2019). Inventaire des Muricidae récoltés au cours de la campagne MADIBENTHOS du MNHN en Martinique (Antilles Françaises) et description de 12 nouvelles espèces des genres Dermomurex, Attilosa, Acanthotrophon, Favartia, Muricopsis et Pygmaepterys (Mollusca, Gastropoda). Xenophora Taxonomy. 23: 22-59.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Stramonita haemastoma

Start with the simplest possible case. Write down what Stramonita haemastoma 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 Stramonita haemastoma 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 Stramonita haemastoma 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 Stramonita haemastoma

In research: Stramonita haemastoma 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 Stramonita haemastoma 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: Stramonita haemastoma is common in secondary-school and first-year university syllabi. It links to neighbouring topics Animal taxa named by Carl Linnaeus, Gastropods described in 1767, Gastropods of Africa, so understanding it makes those chapters shorter.
In everyday life: Look for Stramonita haemastoma 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Stramonita haemastoma” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Stramonita haemastoma in 20 minutes

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

Frequently asked questions

What is Stramonita haemastoma in simple terms?

Stramonita haemastoma, common name the red-mouthed rock shell or the Florida dog winkle, is a species of predatory sea snail, a marine gastropod mollusc in the family Muricidae, the rock snails. Subspecies Stramonita haemastoma contains the following subspecies: Stramonita haemastoma canaliculata (…

Why does Stramonita haemastoma 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 Stramonita haemastoma?

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 Stramonita haemastoma.