Classification of Tubifex Tubifex is a type of tubificid segmented worm that lives in the sediments of lakes and rivers throughout multiple continents. It is also known as the sludge worm, sewage worm, or just tubifex worm. Tubifex probably contains a number of species, but it is challenging to differentiate between them since the reproductive […]
Classification of Pheretima (Earthworm) Earthworms in the genus Pheretima are primarily found in portions of Southeast Asia and New Guinea. The clitellum, a ring of glandular tissue found on segments 14 to 16, is characteristic of species of the genus Pheretima. Humans are hermaphrodites, and they can reproduce sexually or parthenogenetically. The ventral surface of
Classification of Sternaspis The plump, white, barbell-shaped worm Sternaspis scutata can reach a length of roughly 3.5 cm (1.4 in). The second through fourth of the seven segments that make up the anterior region have lateral bundles of chaetae, or bristles. Compared to the posterior portion of the worm, which contains thirteen to fifteen segments,
Classification of Spirorbis The genus Spirorbis contains tiny polychaete worms (2–5 mm; 0.079–0.197 in) that often have a white, coiled shell. The genus’s members inhabit stony shorelines’ lower littoral and sublittoral zones. Although some species of spirorbis worms dwell directly on rocks, shells, or other hard substrates, most species are linked to seaweeds. Although all
Classification of Serpula Serpula is a genus of sessile, marine annelid tube worms that are members of the Serpulidae family. It is often referred to as calcareous tubeworm, serpulid tubeworm, fanworm, or plume worm. The only difference between serpulid worms and tube worms of the closely related sabellid family is that the former have a
Larval Forms in Echinodermata Larval Forms in Echinodermata. No other group of animals has such complicated metamorphosis in the course of development. Development may be direct or indirect. In direct one, the larval stages are missing while in indirect one, various types of free-swimming larvae are formed. In each class, a few members, are viviparous,
Larval forms of Mollusca Larval forms of Mollusca may serve two purposes- finding new settling sites and gaining access to the rich food supply of phytoplankton. The earliest molluscan larva was no doubt a trochophore like that of an annelid. It was a top-shaped creature with a tuft of cilia above and a ciliated band
Larval Forms of Crustaceans Larval Forms of Crustaceans show both direct and indirect development. In direct development (e.g., Palaemon, crayfish), the adult is attained by progressive growth and differentiation of the embryo, so that the newly hatched young resembles the parents in general structure. In indirect development, there is a larval stage which differs from
The majority of terebella, which may grow up to 150 millimeters in length and 15 millimeters in breadth, reside in burrows or cracks. Finding and gathering food particles from the sediment surface is accomplished by the many, extremely long tentacles that extend from close to the mouth. Unlike ampharetids, the tentacles cannot be retracted. In
The Amphitrite worm lives in a solid, sand-encrusted tube and can reach a length of forty centimeters. The three brilliant red bushy gills and a spread of long peach-colored tentacles above them are all that are visible. The tentacles are always moving, looking for food particles, and they can reach a length of forty centimeters.
Lugworms and black lugs belong to the genus Arenicola, which is commonly referred to as sandworms. On the coasts of North America and Humboldt Bay, California, A.cristata is the most common warm-water lugworm. While Arenicola marina is primarily found in Europe, including Norway, A. caroledna is more common in China and Japan. Only Southern Africa
Classification of Sabellaria Kingdom :- Animalia (Multicellular eukaryotic organisms) Phylum :- Annelida (Segmented worms with true coelom and metamerism) Class :- Polychaeta (Marine bristle worms with parapodia) Order :- Canalipalpata (Sedentary polychaetes with grooved palps) Family :- Sabellariidae Genus :- Sabellaria Habit and habitat of Sabellaria It is a marine, sedentary polychaete, more or less
PRIMITIVE NERVOUS SYSTEM OF COELENTERATES AND ECHINODERMS Primitive nervous systemof coelenterates and echinoderms :- The environment and the need of organism is not constant, it fluctuate every time. So every organism need an inbuilt system that allow it to gather information about changing environment and its body need and then allow to respond according. This
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OSMOREGULATION OF FRESHWATER AND MARINE INVERTEBRATES Osmoregulation of freshwater and marine invertebrates- Regulation of osmotic pressure of an organism body fluid is refer to as osmoregulation. It allow to maintain balance of water content, fluid content and electrolytes. Hence due to osmoregulation body neither become too dilute nor become too concentrated. Right concentration of solute
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EXCRETION IN HIGHER TERRESTRIAL INVERTEBRATES Excretion in higher terrestrial invertebrates – Excretory system regulates the amount of nitrogenous material, inorganic salts and water content in the blood. Both cockroach and earthworm are terrestrial in habitat their excretion is discuss in detail. Nephridia act as primary excretory organs in case earthworm. On the basis of where
EXCRETION IN HIGHER AQUATIC INVERTEBRATES Excretion in higher aquatic invertebrates :- Process by which nitrogenous waste produce during metabolism is removed is known as excretion. Some animals such hydra, echinoderms and other may not posses proper excretory organs the reason is quite clear that they are aquatic and it is supposed that nitrogenous material may
EXCRETION IN LOWER INVERTEBRATES Excretion in lower invertebrates :- There are thousands of metabolic processes that occur in any animals body. Definitely if they provide energy, and information there are hundreds of useless by product that are also form. This by products which are formed during any metabolic reaction can be toxic for our body
ORGANS AND MECHANISM OF RESPIRATION IN HIGHER INVERTEBRATES Organs and mechanism of respiration in higher invertebrates :- All animal whether big or small, aquatic, aerial or terrestrial, vertebrates or invertebrates require oxygen for performing basic cellular activities and obtaining energy. Whereas as needs carbon dioxide to be removed from our body. For obtaining energy and
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ORGANS AND MECHANISM OF RESPIRATION IN LOWER INVERTEBRATES Organs and mechanism of respiration in lower invertebrates – Carbon dioxide can be utilized by plant for the process of photosynthesis. Other than that most of animal eliminate carbon dioxide from their body and mostly supplies their tissues and cells with oxygen. Hence respiration is process by
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PATTERN OF FEEDING AND DIGESTION IN HIGHER INVERTEBRATES Pattern of feeding and digestion in higher invertebrates :- There are numerous physical, chemical as well as mechanical process by which invertebrates capture food and passes it to their respective digestive organs. For this purpose different organism utilises different body organs such as tentacles, arms, tube feet,
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