ipl-logo

Horseshoe Crab Research Paper

1090 Words5 Pages

Horseshoe crabs are marine living fossils, probably traced back to 485 million years ago. There are two horseshoe crab species found in Hong Kong.
Horseshoe crabs are an ancient marine chelicerates, identified as the Class Merostomata, Order Xiphosura. The animals are identified by the possession of appendages around their ventral mouth and their swimming legs at their distal end. They have closer lineages with trilobites and arachnids such as spiders and scorpions instead of the "real" crabs which are crustaceans. Four extant species of horseshoe crabs are found and have survived over the geological period. They are classified to three genera in two families under the Superfamily Limulacea. They have hardly changed in millions of years. The oldest horseshoe crab fossils are probably traced back to the Cambrian period, which is nearly 485 million years ago. Therefore, the existing horseshoe crab species are treated as living fossils. …show more content…

Oriental Blechnum

Blechnum orientale is an evergreen fern forming a clump of arching fronds from 20 to 200cm tall, growing from a thick rhizome that rises to a short, erect trun. The plant is sometimes harvested from the wild for local use as a food and a medicine. It is often cultivated as an ornamental.
The plant is anthelmintic, antiviral, contraceptive and tonic. It is used in treating urinary complaints, impotence, boils in babies and older children and diarrhoea. It is believed that total sterility in women can be done by eating the new leaves of this plant each day for three complete days, then waiting a fortnight and repeating the treatment again.
A paste of the young fronds can be used to treat abscesses and fungal skin infections, esp ringworm, and to stop bleeding.The plant has components of essential oil, phenolic compounds and triterpenoids.

http://tropical.theferns.info/viewtropical.php?id=Blechnum%20orientale

3. Bamboo Pit

Show More
Related
1285 Words | 6 Pages

Introduction: Isopods are crustacean, which is split into smaller groups, called order. Scientifically Isopoda order is called isopods, which include pill bugs and sow bugs (Crustacean class). Most of the time isopods are mistaken for “bugs” since they look like insects.

Read More
754 Words | 4 Pages

Ella Aerts Period 5 Your Inner Fish Discussion Answers Chapter 1 - Finding Your Inner Fish Neil and his colleagues focused on rocks from 375 million years ago because fossils from 360 million years ago were amphibians with necks and four legs. However rocks that are 380 million years old looked more like fish we know today, with fins and scale. So, it made sense that they would find the transitioning fossils in rocks that was 375 million years old.

Read More
877 Words | 4 Pages

Isopods can be as long as 500 millimeters and can live as long as 4 years. Their body has 3 part; the head, thorax, and abdomen. They are often caught from the wild. Due to being caught in the wild, Isopods are often found living under rocks, logs, leaves, lakes, rivers, and streams. Isopods can hermaphroditic which is being both girl and guy, meaning they do not need a mate to produce offspring.

Read More
989 Words | 4 Pages

Terrestrial isopods, commonly known as sowbugs, and pillbugs, given the nickname, roly-polies. Pillbugs develop this name because they have atendency to roll up when they feel like they have been threatened, on the other hand sowbugs do not show this behavior. Pillbugs belong to the members of Phylum Arthropoda and to the class of Crustacea. They share the class of Crustacea with many other unique animals such as the crayfish, lobster, shrimps, crayfish, and barnacles. Pillbugs have a hard segmented exoskeleton, 2 antennas, 2 compound eyes, and seven pairs of

Read More
149 Words | 1 Pages

Lobster Claw of Doylestown is a locally-owned restaurant and seafood market. The restaurant’s dining area is spacious and casual with large booth seats for guests. The seafood market offers a wide range of freshly caught seafood as well as homemade batter mixes, marinades, sauces and spices. Lobster Claw has been serving the area for over 25 years and is dedicated to using only the freshest seafood and ingredients. Begin with an appetizer like fried pickles, crab puffs, steamed clams, sweet potato fries or beer battered shrimp.

Read More
70 Words | 1 Pages

Horseshoe crabs, marine arthropods known for their horseshoe like shells have been roaming the Earth long before the dinosaurs. These living fossils only inhabit the Eastern Shore and can be found on Delaware beaches such as the Delaware Bay, but these living relics may be in for extinction. Due to this exact reason Delaware has begun studying and protecting these species. Horseshoe crabs are vital to the Delaware Bay ecosystem,

Read More
1085 Words | 5 Pages

In the book, “Crabs Dig Holes According to Size of Their Shells” by James McPherson He talks about his ‘shell” which is his room, and crabs which is himself. The story is mostly about him being alone and him seeming like he is sad about something in life, which brings me to my thought of what his message is. My thought of his message is McPherson’s message is that at one point in life you are going to hit a low in life then develop a shell you want to hide in. My first quote is “Something was denying me peace because I was denying it from range and meaning” To paraphrase the quote the keywords are deny,peace and something. In the quote the word deny means that he is denying his own peace by something in life.

Read More
499 Words | 2 Pages

The Asian shore crab has recently invaded the temperate east coast of North America, being a native species to temperate and subtropical regions of the western pacific it can thrive in any like environment (2). The first reports of this species in North American waters were in intertidal habitats in Delaware Bay and stretch to areas of the coast of Maine (2). In a study from 2002 to 2005 of Asian shore crabs in Western Long Island Sound Estuary it was seen

Read More
697 Words | 3 Pages

To put this into perspective, paleontologists scale life’s history down to an earth year in which humans did not appear until the very last day of the calendar year. In fact, most of life has consisted of single-celled organisms. The first bodies were not even really seen until the 1920s, and when they were finally discovered, people didn’t even pay much attention, that is until Martin Glassner came around. Glassner, after observing the findings of Martin Gurich and Reginald Sprigg, proved, without a doubt, that their fossils where 15 million to 20 million years older; these fossils came from the Precambrian period, a period thought to to be absent of life. Some of these fossils resembled primitive creature such as jellyfish and sponges, but the patterns found on some of the others matched absolutely zero living creatures.

Read More
1248 Words | 5 Pages

Originally found in the Atlantic Ocean, the sea lampreys where first discovered in Lake Michigan in 1936. The sea lampreys can be described as jawless parasites with mouths similar to suction disks. They also have very sharp teeth which they us to attach themselves to fish in the water, allowing them to feed on their blood and body fluid for various hours or even weeks. This usually causes visible injures to the bigger fishes and kill smaller fishes. These sea lampreys contribute to the decline in the population of white fish in the great lakes.

Read More
592 Words | 3 Pages

Ralph Waldo Emerson once wrote, “What lies behind us and what lies before us are tiny matters compared to what lies within us.” Poet Mark Doty shares this sentiment in his piece “A Green Crab’s Shell” which explores the theme of death through an abandoned carapace of a small sea creature. Doty employs evocative imagery, colorful detail, and fragmented structure in his poem to portray death as an opportunity to be reflective on one’s life. In investigating the small shell, Doty shows the beauty of what one leaves behind, far after their death, no matter how insignificant or short their life might have seemed.

Read More
656 Words | 3 Pages

The reason for that is because once you gain a new shell, there are few remnants of your old one. I now know what excellence feels like. Up on that stage receiving my merit for years of hardships - that is excellence. When hermit crabs have outgrown their shell, they shed it and look for a new one. Sometimes they will go bare before they find their new home.

Read More
372 Words | 2 Pages

They were believed to have become tree dwelling in the later species. The discovery of the anklebones is substantial because paleontologists had only the animal’s teeth and jaws to study. The anklebones were found in the

Read More
1275 Words | 6 Pages

Cousin always enjoyed his dreams, thought of them as movies in which he starred. The best part was their length and how vivid everything was. It seemed as if he had but one dream each night, and that lasted until he woke. The details of the dreams often remained with him throughout the day, and he would reflect on their possible meaning and significance. This dream seemed no more peculiar than any other did at first.

Read More
941 Words | 4 Pages

In “The Cask of Amontillado,” Edgar Allan Poe uses diction and irony to create a suspenseful and sinister mood to further keep his readers in a state of suspense. Throughout the story, it remains a mystery as to why the narrator has such hatred toward Fortunato. In the beginning of the story, Poe uses diction that appeals to the audience by including words relating to acts of revenge. “You, who so well know the nature of my soul, will not suppose, however, that I gave utterance to a threat.

Read More

More about Horseshoe Crab Research Paper

Related Topics

Open Document