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Pheretima is a genus of earthworms found mostly in New Guinea and parts of Southeast Asia. Species belonging to the genus Pheretima have a clitellum, which is a band of glandular tissue present on segments 14 to 16. Individuals are hermaphroditic and reproduction can be either sexual or parthenogenetic. Female genital pores lie on the ventral ...
The first body segment (segment number 1) features both the earthworm's mouth and, overhanging the mouth, a fleshy lobe called the prostomium, which seals the entrance when the worm is at rest, but is also used to feel and chemically sense the worm's surroundings. Some species of earthworm can even use the prehensile prostomium to grab and drag ...
They can be distinguished by the location of the primary spermathecal pores in parietal invaginations. He then named this earthworm after Pheretima praepinguis in 1935. Although Yi Chen insisted that Pheretima praepinguis is a synonym of Pheretima tschiliensis in an article published in 1936, [4] this name is ubiquitously accepted nowadays. [2] [5]
The Kinabalu giant earthworm (Pheretima darnleiensis) is a grey-blue coloured peregrine annelid.It is found widely in Southeast Asia, primarily in the Indo-Australasian Archipelago (e.g., Singapore, Sumatra, Java, Bali, Borneo, Sulawesi, the Philippines, some islands near New Guinea such as Darnley Island and Christmas Island), but also in Peninsular Malaysia.
The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches that secretes a viscid sac in which eggs are stored. [1] It is located near the anterior end of the body, between the fourteenth and seventeenth segments.
These cells are derived from the inner coelomic epithelium and are present in the coelomic fluid of some annelids. [2] They have characteristic vesicular bulging due to their function in storing and transporting substances, and are yellow due to the presence of cytosolic granules known as chloragosomes.
[1] The flame cell has a nucleated cell body, with a "cup-shaped" projection, with flagella covering the inner surface of the cup. The beating of these flagella resemble a flame, giving the cell its name. The cup is attached to a tube cell, whose inner surface is also coated in cilia, which help to move liquid through the tube cell.
Stylised diagram of the last part of the insect's digestive tract showing malpighian tubule (orthopteran type)The Malpighian tubule system is a type of excretory and osmoregulatory system found in some insects, myriapods, arachnids and tardigrades.