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Microchaetus rappi, the African Giant Earthworm, is a large earthworm in the family Microchaetidae, the largest of the segmented worms (commonly called earthworms). It averages about 1.4 meters (4.5 feet) in length, but can reach a length of as much as 6.7 meters (22 feet) and can weigh over 1.5 kilograms (3.3 pounds).
Giant Palouse earthworm - A vulnerable North American species. Oregon giant earthworm - A relative of the Palouse earthworm. Specimens have been recorded at 1.3 m (4 feet) long. Lake Pedder earthworm - Listed as the first "extinct" worm species from its original unique Tasmanian habitat. Lumbricus badensis - Giant (Badish) earthworm.
The Mekong giant earthworm may grow to a length of up to 2.9 m (10 ft). [2] Compared to their great length, these worms are relatively slender. [3] The type specimen was one metre long and 8 mm (0.3 in) wide at the broadest point (segment 5). It had 370 segments and was a greyish colour, rather paler on the ventral surface.
Oligochaetes are well-segmented worms and most have a spacious body cavity (coelom) used as a hydroskeleton.They range in length from less than 0.5 mm (0.02 in) up to 2 to 3 metres (6.6 to 9.8 ft) in the 'giant' species such as the giant Gippsland earthworm (Megascolides australis) and the Mekong worm (Amynthas mekongianus).
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Both male and female reproductive organs are present in earthworms because they are monoecious. To breed, two earthworms exchange sperm. Long after they are separated, the egg case is secreted. It forms a ring around the worm, then the worm removes the ring from its body and injects its own eggs and the other worm's sperm into it.
This is a list of extant species in the Felidae family, which aims to evaluate their size, ordered by maximum reported weight and size of wild individuals on record. The list does not contain cat hybrids, such as the liger or tigon.
Lumbricus terrestris is a large, reddish worm species thought to be native to Western Europe, now widely distributed around the world (along with several other lumbricids). In some areas where it is an introduced species , some people consider it to be a significant pest for out-competing native worms.