The Atlantic horseshoe crab (Limulus polyphemus) is the only member of the genus Limulus that is still alive. Although several other species have been identified and subsequently assigned to other genera, the genus now has one fossil species credited to it. Classification of Limulus (Horseshoe crab) Phylum Arthropoda Jointed appendages. Class Arachnida

Male spiders (Araneus) in this genus are typically 1⁄3 to 1⁄4 the size of females, making them possibly the most blatant example of sexual dimorphism in the whole orb-weaver family.

The predatory arachnids known as scorpions (Palamnaeus) have eight legs, two grabbing pincers, and a slender, segmented tail that always ends with a stinger and is frequently carried in a distinctive forward curve over the back.

Peripatus is zoologically very interesting, because it exhibits both arthropod and annelid characters as under. Peripatus is supposed to be the connecting link between Annelida and Arthropoda.

The class Diplopoda, which derives its name from the Latin mille, which means "thousand," and pes, which means "foot," is the formal term for the group of arthropods known as Julus (millipedes).

There are several centipede species in the genus Scolopendra that are found in both milder temperate regions and tropical regions of the planet. The species differ greatly in size and color. The majority of scolopendra are enormous centipedes

Crabs in the genus Carcinus (Greek: Καρκίνoς Karkinos) include the significant invasive species Carcinus maenas and the Mediterranean Sea-endemic species C. aestuarii.

The little, sand-burrowing decapod crab species Hippa adactyla inhabits the shores of the Indo-West Pacific. It can be found in the swash area of the intertidal zone on bare sandy beaches.

Crocodile vs alligator vs gharial are large semi-aquatic reptiles belonging to the order Crocodilia. They differ greatly in appearance, habitat, behavior, and distribution, although having many traits in common, like as strong jaws, armored bodies, and a lifestyle related to water. Comprehending these differences facilitates precise identification and emphasizes their ecological significance. Physical Differences Between Crocodile vs alligator vs gharial…

Commonly identified as belonging to the genus Pagurus, Eupagurus is a genus of marine hermit crabs in the Paguridae family. They are distinguished by their asymmetrical, soft, and curled abdomens, which necessitate sheltering in empty snail shells. These decapods are found in marine habitats all over the world, frequently coexisting with sea anemones.

The history of biological classification states that the Greek philosopher Aristotle categorized many creatures according to their environment, traits, etc. Later, in the 18th century, Swedish botanist Carolus Linnaeus established the Taxonomic Hierarchy Categories, a classification scheme that is still in use today.

Crayfish vs Lobster : Differences Explained - The fact that lobsters are sometimes referred to as crayfish in some places only serves to further confuse the two species. They do appear strikingly same, so it's simple to make the mistake. Both have big pincers and robust exoskeletons, and they both live in water. In actuality, however, they belong to two distinct species.

Palinurus is a genus of lobsters in the family Palinuridae, native to the eastern Atlantic Ocean, the Mediterranean Sea and the western Indian Ocean. A 110 million year old fossil, recognizable as a member of the genus Palinurus, was discovered in a quarry in El Espinal, Chiapas state, Mexico, in 1995 and named P. palacesi.

Astacus astacus (commonly known as the European crayfish, noble crayfish, or broad-legged crayfish) is a freshwater decapod native to Europe from France to Russia to Scandinavia

Collage of Protista, one of the most famous litter taxa. The majority of its members have little in common, except that they are eukaryotes that are not plants, animals, or fungi. Wastebasket taxon (also called a waste-bin taxon, dustbin taxon or catch-all taxon) is a term used by some taxonomists to refer to a taxon intended to classify organisms that do not fit anywhere else.

Introduction Macrobrachium Malcolmsonii (formerly known as Palaemon Malcolmsonii) or monsoon river shrimp is an economically important nocturnal omnivorous freshwater shrimp that inhabits the rivers, lakes, and ponds of India, Pakistan, and Bangladesh. They are 25 to 40 cm long, relatively hardy, and prefer slow, clear water. They are bottom-dwellers that breed during monsoon months. Classification of Palaemon malcomsonii

Classification of Ostrea verginiana, O. virginiana is highly valued as food. Oysters are cultivated by men like other animal products industry

Introduction to Amphibians Amphibians are a fascinating group of animals that represent a critical evolutionary bridge between aquatic and terrestrial life. Derived from the Greek word amphibios, meaning "double life," amphibians embody the duality of existence as they inhabit both water and land during different stages of their life cycle. This remarkable ability to adapt to diverse environments has earned their place as one of the most versatile and resilient groups of vertebrates on Earth. Amphibians belong to the class Amphibia and are characterized by their soft, moist skin, which plays a vital role in respiration and hydration.

Introduction Loligo is a well-known genus of squid belonging to the family Loliginidae. These squids are admired for their speed, intelligence, and streamlined bodies. Because of their advanced adaptations and global distribution, species are significant not only in marine ecosystems but also in scientific research and international fisheries. This detailed article explores their morphology, ecological role, life cycle, and importance from both biological and human perspectives.

Sepia is a remarkable genus of cuttlefish recognized for its advanced camouflage abilities, intelligence, and unique cuttlebone structure. This guide provides a clear overview of its classification, physical traits, ecology, and importance in marine ecosystems. Scientific Classification of Sepia Taxonomic Rank Classification Characteristics Kingdom Animalia Multicellular and heterotrophic Phylum Mollusca

The Aravalli Crisis 2025: A Battle for India’s Ecological Shield The Aravalli Range, one of the world's oldest geological features, is currently the center of an intense legal and environmental battle. Spanning nearly 700 kilometers across Gujarat, Rajasthan, Haryana, and Delhi, these hills serve as the primary barrier against the expansion of the Thar Desert and the "green lungs" for North India.

Master of Camouflage and Intelligence The Octopus is perhaps the most famous and highly intelligent member of the class Cephalopoda, a group of marine mollusks that also includes squid and cuttlefish. Renowned for its eight highly flexible arms, sophisticated camouflage abilities, and remarkable problem-solving skills, the octopus represents the pinnacle of invertebrate evolution. Their lack of a shell, their soft body, and their complex nervous system distinguish them as one of the most successful and fascinating predators in the world's oceans.

The Nautilus, a majestic marine mollusk, is often revered as a "living fossil" for its remarkable survival through multiple mass extinctions over an evolutionary history spanning nearly 500 million years. It is the sole living genus of the subclass Nautiloidea, a lineage that once dominated the ancient oceans. Unlike its more modern relatives—the squids, octopuses, and cuttlefish—the Nautilus has retained a magnificent, coiled…

Introduction Argonauta, also known as the paper nautilus, is a fascinating genus of pelagic octopods belonging to the family Argonautidae. Often mistaken for the true nautilus (a shelled cephalopod), the Argonauta is unique for the intricate, delicate, paper-thin shell that the female secretes and uses to house her eggs and potentially for buoyancy and respiration. This article will delve into the classification, unique biology, and distinguishing features of this intriguing marine creature.

Unio: Classification, Habitat, Morphology, Ecology, and Identification Unio is a genus of medium-sized, freshwater mussels belonging to the family Unionidae, commonly known as river mussels. These bivalve mollusks are widely distributed across Europe, Africa, and the Middle East, with some species introduced into East Asia. revered for their ecological role in water filtration and as indicators of water quality, Unio species have a rich fossil history dating back to the Jurassic period.