Articles tagged with Mollusks
Researchers used snail shells to recreate prehistoric cyclones in South East Queensland, Australia, by analyzing growth rings and stable isotopes. The study showed that snails responded to extreme rainfall events, not annual wetness, providing a new climate archive for the region.
A large-scale study of nearly 700 species of Neogastropoda provides strong evidence for their single evolutionary origin, identifying four new families and a previously undetected burst of diversification in the early Cenozoic. This finding challenges existing knowledge of marine snail diversity and evolutionary history.
The newly discovered species Erhaia dijiang is a true troglobiont, adapted to its pitch-black environment with degenerated eyes and a highly translucent shell. It inhabits underwater gravel and crushed stone at depths of less than one meter, where water temperatures remain consistently near 20°C.
Researchers discovered a structural aberration in octopus ribosomes that enhances accuracy and reduces errors in protein synthesis. This finding may be linked to the evolution of the octopus's complex sensory system, which includes a highly sensitive 'taste by touch' system.
The discovery of two new snail species in Montenegro highlights the need to protect the country's biodiversity. The snails, found in Durmitor National Park and Komarnica Canyon, were described as having unique features such as conical shells and a circular disk on their tails.
A team of researchers has discovered a new genus and species of subterranean freshwater snail, Cyllena hermes, in the Peloponnese region of southern Greece. The species is highly sensitive to environmental stressors due to its reliance on a single, isolated water source.
Research on ocean acidification's impact on cephalopod brains reveals a 49% reduction in brain volume compared to controls. The greatest reductions were found in visual information-interpretation regions, correlating with significant feeding behavior changes.
Researchers have found that oyster meat extract can effectively reduce TNF-α-induced intestinal inflammation by interrupting NF-kB signalling pathways and decreasing COX-2 enzyme expression. This natural supplement has potential as a sustainable solution for managing chronic inflammatory diseases.
A study reveals Brazil has at least 82 non-native mollusk species, causing ecological damage and economic losses. The most comprehensive inventory in Brazil highlights the urgent need to strengthen biosecurity measures and monitor long-term impacts.
A new study from Cornell University found that farmed eastern oysters are adding to and breeding with wild eastern oyster populations in the western and central Long Island Sound. This genetic evidence suggests that oyster farms may provide a demographic supplement to dwindling populations, potentially benefiting ecosystem services.
A new species of sea slug, Thecacera sesama, has been identified in the coastal waters of Keelung, Taiwan. Measuring less than three millimeters in length, this tiny nudibranch exhibits four primary behaviors: feeding, searching, mating, and laying eggs on bryozoans.
Research by Taro Yoshimura examines the history and linguistic landscape of biodiversity, finding that ancient Greek dominates molluscan family names, often due to prestige and style. This highlights a human side to naming, where science is shaped by epistemic values and cultural biases.
Researchers documented new habits and habitats for current Nautilus and Allonautilus species, revealing they live in deeper water than their extinct cousins and scavenge food constantly. A new population of Allonautilus was found off New Britain, thriving due to hunting restrictions inspired by research efforts.
Researchers at Trinity College Dublin have discovered that crushed oyster shells can capture and remove rare earth elements from polluted water. The shells trigger a chemical reaction that converts dissolved metals into solid mineral crystals, making them an effective tool for environmental cleanup.
Restored oyster reefs in the US Atlantic coast remove more nitrogen from the water than previously estimated. Additionally, their restoration provides greater economic value for coastal communities, supporting sustainable marine ecosystems.
Oysters have been found to coordinate with microbes to regulate chemistry and support shell calcification, highlighting potential partnerships for resilience in a changing ocean. This discovery may also provide insights into how microbes contribute to resilience in other organisms.
A new study by Geerat Vermeij and Tracy Thomson found that mollusks evolved unique physical traits at a frequency of once every 2 million years in early history, declining to about one trait every 9 million years. The evolution of these traits has become increasingly predictable over the 540-million-year history of mollusks.
A study published in the Journal of Experimental Marine Biology and Ecology found that exposure to oleamide, a chemical additive in plastics, caused immediate changes in octopus prey choice and interactions with predators. The effects persisted for at least three days, suggesting a lasting impact on marine behavior and ecosystem dynamics.
A study of over 3,200 terrestrial mollusk species found that nearly half were described by non-local researchers, highlighting a neocolonial practice. This 'helicopter science' or 'parachute science' harms local researchers and can lead to less robust studies.
Scientists have discovered a new species of deep-sea limpet clinging to a sunken log in the Central Pacific Ocean. The discovery provides crucial insights into ocean biodiversity and ecosystem secrets, revealing that even tiny islands of habitat can sustain deep-sea communities long enough for population turnover and dispersal.
Researchers discovered a common parasite of modern oysters has been infecting bivalves for hundreds of millions of years. The parasite, belonging to the spionid group, has remained largely unchanged despite multiple mass extinction events.
Scientists study ancient oyster populations to guide present-day restoration efforts. By analyzing shell size and breakage, researchers can interpret how intensively communities harvested oysters, shedding light on the challenges of rebuilding depleted reef ecosystems.
Researchers have developed a method to reconstruct functional diversity of past ecosystems from fossils, enabling conservationists to compare healthy ecosystems with modern counterparts that have been altered by humans. This information can be used to set restoration and protection goals for endangered species.
A new study from the University of Maine compares two common Atlantic sea scallop farming methods, lantern net and ear-hanging. The research found that ear-hanging production is more advantageous when scallops' life cycles exceed three years, with faster rate of production and larger adductor muscles.
Researchers found that mangrove populations have nearly tripled in areas with oysters, leading to significant acidification of oyster reef sediment. Oyster shell dissolution could impact reef viability and services like filtration and storm surge reduction.
Researchers have discovered a new species of deep-sea limpet, measuring up to 40.5 mm in shell length, found 5,922 meters beneath the northwestern Pacific Ocean. The species, named Bathylepeta wadatsumi, has broader ecological implications as it appears to graze on sediment layers over rock.
A team of researchers has discovered that ancient nectocaridids, thought to be cephalopods, are actually an early descendant of arrow worms. This finding reveals complex predators in the food chain and sheds light on the evolution of these creatures.
A new study maps the geographical distribution of shallow-water marine mollusks, showing how temperature, ocean currents, and paleogeographic development shape their habitats. The research highlights the impact of rapid climate change on marine ecosystems, threatening biodiversity.
A new study published in Marine Ecology Progress Series reveals that seagrass ecosystems along Florida's Nature Coast have remained relatively healthy over the last several thousand years. The research, conducted by conservation paleobiologists, used fossilized mollusk shells to infer ecosystem health and found that these communities a...
Researchers at the University of Tsukuba investigated the developmental fate of shell-forming cells in limpets using single-cell transcriptome and gene expression analyses. They found that the developmental fate of these cells was specified independently of interactions with neighboring cell lineages, contradicting conventional hypothe...
A specialized manufacturing process was used to produce a large-scale production of purple dye in ancient Israel's Tel Shiqmona. The discovery sheds new light on the Iron Age production of this valuable resource.
Researchers found that ancient molluscs Punk and Emo possessed some unique features and were more complex and adaptable than previously known. The study revealed a wider variety of forms and movement strategies in this group of early molluscs, challenging the longstanding view that they were basic and primitive.
A deadly marine cone snail's venom contains a toxin that interacts with human cells in a specific manner, regulating blood sugar levels and hormone balance. This discovery may lead to the design of more effective drugs for treating diabetes and endocrine disorders.
Researchers at University of Tsukuba have achieved the first successful lab rearing of Hypselodoris festiva, revealing a previously unknown growth process. The study describes nine stages of development, from metamorphosis to adulthood, and provides a reference for further research on Chromodorididae species.
A newly discovered fossil, Shishania aculeata, provides crucial insights into the origin of molluscan skeletons. The finding suggests that this stem mollusk is representative of an intermediate between early members of the superphylum lophotrochozoans and more derived mollusks.
A 500-million-year-old fossil reveals the earliest known ancestors of modern molluscs were flat, armoured slugs covered in chitinous spines. These findings provide a unique window into early mollusc evolution and challenge current understanding of their origins.
A Bronze Age purple dye workshop has been found on the Greek island of Aegina, featuring tools, ceramics, and snail shells that reveal the production process. The site provides insights into Mycenaean culture and trade during the Late Bronze Age.
Researchers have solved the mystery of shipworms' ability to digest lignin, a tough wood substance. A population of symbiotic microbes in the typhlosole sub-organ produces enzymes that break down lignin, with potential practical applications in biotech and significant impacts on climate change and human health.
Rutgers scientists found thriving and growing surfclam populations off the coast of Virginia, with characteristics similar to those in New Jersey. The study suggests improved environmental conditions or adaptation may be responsible for the rebound.
Scientists have found polyene pigments in fossilized snail shells that are 12 million years old, providing the world's first evidence of intact pigments in fossils. The discovery was made possible by analyzing the pigments using Raman spectroscopy and sheds new light on the chemical composition of ancient organisms.
Researchers have discovered nine new carnivorous land snail species in Papua New Guinea, a region with high biodiversity and threatened by deforestation. The newly named species possess unique characteristics, such as tightly coiled shells and dagger-shaped teeth, and are likely predators.
Researchers discovered 50 genetic changes underlying the switch from egg-laying to live-bearing in marine snails, which evolved within the past 100,000 years. The findings provide insights into the evolutionary process and potential benefits of live-bearing, including increased reproductive success in new habitats.
The current emoji library underrepresents plant, fungus, and microorganism biodiversity while overrepresenting animals. This bias reflects known biases in biodiversity assessments and conservation analyses.
A new study uses marine fossils to infer the health and stability of coastal ecosystems, revealing consistent patterns in population declines and species extinctions. The findings provide a reliable benchmark for conservation efforts and offer insights into the impacts of human activities on marine biodiversity.
A team of citizen scientists discovered a new species of semislugs in the hot lowland forests of Ulu Temburong National Park in Brunei. The 'snug' was named after a retiring field centre supervisor, Mr. Md Salleh Abdullah Bat, as a farewell gift.
Researchers at Göttingen University have found fluorescent color patterns in fossils from the Triassic period, making them the oldest of their kind. The study reveals a surprising variety of stripes, zigzags, and flame patterns, similar to those of modern seashells.
A team of ecologists from CU museum identified over 7,000 organisms, mostly bacteria, in the guts of Rocky Mountain snails collected between 1920 and 2018. The findings show that microbiomes can offer insights into how animals interacted with their environments centuries ago.
Fossil analysis reveals mollusk communities were resilient to major climatic shifts but struggled under human-induced changes, highlighting the need for conservation efforts.
A 15-year study by University of Virginia researchers shows that restored oyster reefs can match natural reef populations in about six years and continue to thrive thereafter. The study's findings suggest that restoration can catalyze rapid recovery of imperiled coastal habitats and help reverse decades of degradation.
Scientists have discovered that the genomes of marine invertebrates have been surprisingly stable across deep time. The study found that chromosomes are remarkably similar among sponges, jellyfish, scallops, and even humans, with some genes traveling together for almost a billion years.
A new Stanford University study suggests that rising oxygen levels may have slowed down ancient ocean extinctions. The research found that oxygen levels beyond 40% of present atmospheric levels expanded viable ocean habitat and reduced extinction rates. This discovery has implications for understanding the fate of ocean creatures in to...
McGill University scientists created a new glass and acrylic composite material mimicking nacre for exceptional strength and durability. The material is three times stronger and five times more fracture-resistant than regular glass, with potential applications in phone screens and other industries.
A new technique, hyperspectral interference tomography, has been developed to study the structure of nacre, a biomineral found in mother-of-pearl. This nondestructive method allows for the assessment of nacre layer thickness, which records temperature and can be used to analyze fossil mollusk shells and learn about past climates.
Researchers from the Israel Antiquities Authority, Tel Aviv University, and Bar Ilan University discovered rare fabric dyed with royal purple dating back to King David and King Solomon's time. The dye was produced from species of mollusk found in the Mediterranean Sea and is often mentioned in the Bible.
Climate change causes red knot birds to shrink and develop shorter beaks, limiting access to high-quality food sources. This can lead to reduced survival rates among birds born in warm Arctic years, according to a 33-year study.
Chitons have eyes with mineral-based lenses in their shells, allowing them to visualize predators and respond quickly. The size and complexity of individual chiton eyes impact the local mechanical performance of their armor, highlighting trade-offs between protection and sight.
Researchers at the University of Wisconsin-Madison have discovered the earliest stages of nacre formation in a mollusk shell. The team used spectro-microscopy to observe the transformation of amorphous calcium carbonate into crystalline aragonite, revealing new insights into biomineral creation.
Researchers have uncovered the molecular mechanisms behind brachiopod shell formation, revealing evolutionary conserved genetic programs among invertebrates. The study identifies unique proteins and structural resemblances to other animal phyla, providing new insights into the evolution of biomineralization.
Researchers identified two optical structures in a mollusk's shell that reflect blue light, producing its bright stripes. The team believes this natural phenomenon could lead to the development of color-selective, controllable displays for windows and glasses.
Researchers found intact thin sheets of shell proteins preserved for up to 15 million years in fossilized Ecphora shells from southern Maryland. The discovery shares characteristics with modern mollusk shell proteins, providing a unique window into the evolutionary history of these creatures.