Leiobunum rotundum
Encyclopedia
Leiobunum rotundum is a species of harvestman
. It is found in the western Old World
.
. The body is smooth and small. The harvestman's legs can be self-amputated
if it is in danger of predation
, but they do not regenerate
. Although the harvestman has no fangs, poison glands, or silk glands, it can protect itself with the scent glands on the front of its body. The scent glands produce a secretion that repels predators. The species has three different types of nephrocytes. Numerous large nephrocytes occur in clusters between the muscles in the anterior region of the body. Smaller nephrocytes are scattered throughout the body, often stuck to tracheole
s. The third type of nephrocyte is attached to the heart wall by connective ligament
s. The morphology
of the tracheae
in this species is very similar to that of Nemastoma lugubre.
. It can also be found on the Canary Islands
and in Africa
. The species can be found among vegetation such as long grass, herbaceous plant
s, shrub
s, and tree
s. It can sometimes be spotted climbing walls and tree trunks at night.
s, alive or dead. Small invertebrates that it eats include caterpillar
s, mite
s, woodlice
, and slug
s. It drinks a lot of water, especially dew
. It will sometimes suck the juice out of overripe or bruised fruit such as windfall apple
s. The harvestman will sometimes go to outside lights to eat insects that are attracted to the light.
Opiliones
Opiliones are an order of arachnids commonly known as harvestmen. , over 6,400 species of harvestmen have been discovered worldwide, although the real number of extant species may exceed 10,000. The order Opiliones can be divided into four suborders: Cyphophthalmi, Eupnoi, Dyspnoi and Laniatores...
. It is found in the western Old World
Old World
The Old World consists of those parts of the world known to classical antiquity and the European Middle Ages. It is used in the context of, and contrast with, the "New World" ....
.
Description
L. rotundum is chestnut-brown, with a very long round or oval body and thin black legs. There is no separation between the head and the abdomenAbdomen
In vertebrates such as mammals the abdomen constitutes the part of the body between the thorax and pelvis. The region enclosed by the abdomen is termed the abdominal cavity...
. The body is smooth and small. The harvestman's legs can be self-amputated
Autotomy
Autotomy or self amputation is the act whereby an animal severs one or more of its own appendages, usually as a self-defense mechanism designed to elude a predator's grasp...
if it is in danger of predation
Predation
In ecology, predation describes a biological interaction where a predator feeds on its prey . Predators may or may not kill their prey prior to feeding on them, but the act of predation always results in the death of its prey and the eventual absorption of the prey's tissue through consumption...
, but they do not regenerate
Regeneration (biology)
In biology, regeneration is the process of renewal, restoration, and growth that makes genomes, cells, organs, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage. Every species is capable of regeneration, from bacteria to humans. At its most...
. Although the harvestman has no fangs, poison glands, or silk glands, it can protect itself with the scent glands on the front of its body. The scent glands produce a secretion that repels predators. The species has three different types of nephrocytes. Numerous large nephrocytes occur in clusters between the muscles in the anterior region of the body. Smaller nephrocytes are scattered throughout the body, often stuck to tracheole
Tracheole
Tracheole is a fine respiratory tube of the trachea of an insect, part of the respiratory system.Tracheoles are about 1µm in diameter, and they convey oxygen to cells while providing a means for carbon dioxide to escape....
s. The third type of nephrocyte is attached to the heart wall by connective ligament
Ligament
In anatomy, the term ligament is used to denote any of three types of structures. Most commonly, it refers to fibrous tissue that connects bones to other bones and is also known as articular ligament, articular larua, fibrous ligament, or true ligament.Ligament can also refer to:* Peritoneal...
s. The morphology
Morphology (biology)
In biology, morphology is a branch of bioscience dealing with the study of the form and structure of organisms and their specific structural features....
of the tracheae
Invertebrate trachea
The invertebrate trachea refers to the open respiratory system composed of spiracles, tracheae, and tracheoles that terrestrial arthropods have to transport metabolic gases to and from tissues....
in this species is very similar to that of Nemastoma lugubre.
Habitat
This harvestman is widespread throughout Britain including the Channel IslandsChannel Islands
The Channel Islands are an archipelago of British Crown Dependencies in the English Channel, off the French coast of Normandy. They include two separate bailiwicks: the Bailiwick of Guernsey and the Bailiwick of Jersey...
. It can also be found on the Canary Islands
Canary Islands
The Canary Islands , also known as the Canaries , is a Spanish archipelago located just off the northwest coast of mainland Africa, 100 km west of the border between Morocco and the Western Sahara. The Canaries are a Spanish autonomous community and an outermost region of the European Union...
and in Africa
Africa
Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...
. The species can be found among vegetation such as long grass, herbaceous plant
Herbaceous plant
A herbaceous plant is a plant that has leaves and stems that die down at the end of the growing season to the soil level. They have no persistent woody stem above ground...
s, shrub
Shrub
A shrub or bush is distinguished from a tree by its multiple stems and shorter height, usually under 5–6 m tall. A large number of plants may become either shrubs or trees, depending on the growing conditions they experience...
s, and tree
Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
s. It can sometimes be spotted climbing walls and tree trunks at night.
Diet
The harvestman eats a wide range of small invertebrateInvertebrate
An invertebrate is an animal without a backbone. The group includes 97% of all animal species – all animals except those in the chordate subphylum Vertebrata .Invertebrates form a paraphyletic group...
s, alive or dead. Small invertebrates that it eats include caterpillar
Caterpillar
Caterpillars are the larval form of members of the order Lepidoptera . They are mostly herbivorous in food habit, although some species are insectivorous. Caterpillars are voracious feeders and many of them are considered to be pests in agriculture...
s, mite
Mite
Mites, along with ticks, are small arthropods belonging to the subclass Acari and the class Arachnida. The scientific discipline devoted to the study of ticks and mites is called acarology.-Diversity and systematics:...
s, woodlice
Woodlouse
A woodlouse is a crustacean with a rigid, segmented, long exoskeleton and fourteen jointed limbs...
, and slug
Slug
Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell...
s. It drinks a lot of water, especially dew
Dew
[Image:Dew on a flower.jpg|right|220px|thumb|Some dew on an iris in Sequoia National Park]]Dew is water in the form of droplets that appears on thin, exposed objects in the morning or evening...
. It will sometimes suck the juice out of overripe or bruised fruit such as windfall apple
Apple
The apple is the pomaceous fruit of the apple tree, species Malus domestica in the rose family . It is one of the most widely cultivated tree fruits, and the most widely known of the many members of genus Malus that are used by humans. Apple grow on small, deciduous trees that blossom in the spring...
s. The harvestman will sometimes go to outside lights to eat insects that are attracted to the light.