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Amynthas Aspergillum
''Amynthas'' is a genus of earthworms in the family Megascolecidae. They are known as jumping worms, snake worms, or crazy worms because of their erratic thrashing behaviour when disturbed. The genus is native to East Asia, but they are invasive in many areas of the United States. They are a matter of concern in many states, as they disrupt the native forest ecology by affecting soil structure and chemistry. Appearance ''Amynthas'' species can be differentiated from other earthworms by their clitellum, which is pale, annular, is close to the head, and lies flat against the body.''Wisconsin DNR Forest Health.''Jumping Worms (''Amynthas spp.'') Fact Sheet. Updated April 2015. Accessed Dec 22 2022. They vary in size between . Life cycle ''Amynthas'' species' faster reproduction rate, and their ability to reproduce asexually (parthenogenesis) has contributed to their spread into the United States. The worms reach maturity in 60 days, which allows them to have two hatches per year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amynthas Aspergillum
''Amynthas'' is a genus of earthworms in the family Megascolecidae. They are known as jumping worms, snake worms, or crazy worms because of their erratic thrashing behaviour when disturbed. The genus is native to East Asia, but they are invasive in many areas of the United States. They are a matter of concern in many states, as they disrupt the native forest ecology by affecting soil structure and chemistry. Appearance ''Amynthas'' species can be differentiated from other earthworms by their clitellum, which is pale, annular, is close to the head, and lies flat against the body.''Wisconsin DNR Forest Health.''Jumping Worms (''Amynthas spp.'') Fact Sheet. Updated April 2015. Accessed Dec 22 2022. They vary in size between . Life cycle ''Amynthas'' species' faster reproduction rate, and their ability to reproduce asexually (parthenogenesis) has contributed to their spread into the United States. The worms reach maturity in 60 days, which allows them to have two hatches per year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amynthas Agrestis 97113364
''Amynthas'' is a genus of earthworms in the family Megascolecidae. They are known as jumping worms, snake worms, or crazy worms because of their erratic thrashing behaviour when disturbed. The genus is native to East Asia, but they are invasive in many areas of the United States. They are a matter of concern in many states, as they disrupt the native forest ecology by affecting soil structure and chemistry. Appearance ''Amynthas'' species can be differentiated from other earthworms by their clitellum, which is pale, annular, is close to the head, and lies flat against the body.''Wisconsin DNR Forest Health.''Jumping Worms (''Amynthas spp.'') Fact Sheet. Updated April 2015. Accessed Dec 22 2022. They vary in size between . Life cycle ''Amynthas'' species' faster reproduction rate, and their ability to reproduce asexually (parthenogenesis) has contributed to their spread into the United States. The worms reach maturity in 60 days, which allows them to have two hatches per year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthworm
An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan; they are externally segmented with corresponding internal segmentation; and they usually have setae on all segments. They occur worldwide where soil, water, and temperature allow. Earthworms are commonly found in soil, eating a wide variety of organic matter. This organic matter includes plant matter, living protozoa, rotifers, nematodes, bacteria, fungi, and other microorganisms. An earthworm's digestive system runs the length of its body. An earthworm respires (breathes) through its skin. It has a double transport system made of coelomic fluid that moves within the fluid-filled coelom and a simple, closed circulatory system. It has a central and peripheral nervous system. Its central nervous system consists of two ganglia above the mouth, one on either side, connected to a nerve running along its length to motor neurons and sensory cells in each s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megascolecidae
The Megascolecidae is a taxonomic family of earthworms which is native to Madagascar, Australia, New Zealand and both South East Asia and North America. All species of Megascolecidae belong to the Clitellata class. Megascolecidae are a large family of earthworms and they can grow up to 2 meters in length. The intercontinental distribution of Megascolecidae helps in favouring the Continental Drift theory.Reynolds, J.W. 1995. The distribution of earthworms (Annelida, Oligochaeta) in North America. Pp. 133- 153 In: Mishra, P.C., N. Behera, B.K. Senapati and B.C. Guru (eds.). Advances in Ecology and Environmental Sciences. New Delhi: Ashish Publishing House, 651 pp. The distinctive feature that differs Megascolecidae from other earthworm families is their large size in comparison with other earthworm families. They are an essential part of maintaining soil structure, minor carbon sequestration, and maintaining terrestrial ecosystem balance. Megascolecidae is one of many families Anne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clitellum
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. It is located near the anterior end of the body, between the fourteenth and seventeenth segments. The number of the segments to where the clitellum begins and the number of segments that make up the clitellum are important for identifying earthworms. In microdrile earthworms, the clitellum has only one layer, resulting in a smaller quantity of eggs than that of the megadrile earthworms, which have larger multi-layered clitellum that have special cells that secrete albumin into the worms' egg sac. The clitellum is part of the reproductive system of clitellates, a subgroup of annelids which contains oligochaetes (earthworms) and hirudineans (leeches). The clitellum is a thick, saddle-like ring found in the epidermis (skin) of the worm, usually with a light-colored pigment. To form a cocoon for its eggs, the cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amynthas Agrestis
''Amynthas agrestis'', the Asian jumping worm,The species goes by many common names, including the rustic jumping worm, the Alabama jumper, and the Asian crazy worm. is a species of worm in the family Megascolecidae. They have a smooth, glossy grey or brown body with a milky white clitellum, and can range from in length. ''Amynthas agrestis'' is native to Japan and the Korean Peninsula, and was introduced to North America due to increased human activity during the 19th century; it is considered to be an invasive species in the United States. Worms within the genus ''Amynthas'' (jumping worms) reproduce and develop quicker than their European counterparts. Ecology The ''Amynthas agrestis'' became a problem in the United States, specifically the Southern United States, during the 19th century. There is increasing concern about this invasive species. One of the main concerns is the over-consumption of leaf litter, which will impact the microbial and species diversity of the nati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amynthas Japonicus
Megascolecidae earthworm ''Amynthas japonicus'' was a Japanese native probably collected from Nagasaki in the 1820s. It was one of three native earthworms featured in Dr P.F.B. von Siebold’s extensive collection and recorded as one of Japan’s earliest pheretimoid species. It is now deemed extinct given that a 2018 Nagasaki expedition and earlier 1930s reports failed to locate it. It is featured on The Recently Extinct Plants and Animals Database. References {{Taxonbar, from=Q81850459 Megascolecidae Nagasaki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amynthas Mekongianus
''Amynthas mekongianus'', the Mekong worm or Mekong giant earthworm, previously known as ''Megascolex mekongianus'', is a species of earthworm in the family Megascolecidae. It is native to the vicinity of the River Mekong in southeastern Asia and may have more than 500 segments and grow to a length of . Description The Mekong giant earthworm may grow to a length of up to . Compared to their great length, these worms are relatively slender. The type specimen was one metre long and wide at the broadest point (segment 5). It had 370 segments and was a greyish colour, rather paler on the ventral surface. The prostomium was poorly preserved. The second segment had 46 setae (bristles) in an incomplete ring with a gap on the ventral surface. Segments 3 to 25 bore about 100 setae each, arranged in a complete ring. The male pores were on segment 17, but this specimen was immature and lacked a clitellum. Distribution and habitat The type specimen was recorded as being from "Ban Leum on M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amynthas Tokioensis
''Amynthas tokioensis'', the Asian jumping worm, is a species of earthworm in the family ''Megascolecidae''. It is native to Japan and the Korean Peninsula. It is an invasive species in North America. These worms engage in parthenogenetic Parthenogenesis (; from the Greek grc, παρθένος, translit=parthénos, lit=virgin, label=none + grc, γένεσις, translit=génesis, lit=creation, label=none) is a natural form of asexual reproduction in which growth and development ... reproduction. by Chih-Han Chang. Extracted from ''Asian pheretimoid earthworms in North Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haplotaxida
The Haplotaxida are one of two orders within the annelid subclass Oligochaeta, the other being the Lumbriculida. No real common name exists, but they are simply referred to as haplotaxids. Given that the other clitellatan annelids are embedded between and around the Haplotaxida and Lumbriculida, the traditional ''Oligochaeta'' are a paraphyletic assemblage. Thus, the Haplotaxida might eventually be up-ranked to subclass status within the ''Clitellata'' or an expanded Oligochaeta, with the present suborders advancing to order rank. The latter – though without merging the ''Oligochaeta'' and ''Clitellata'' – has been proposed time and again in the past, most prominently for the distinct '' Moniligastrina.'' Families Of the four suborders of Haplotaxida, two are minor lineages, monotypic at family level. Another one, the Tubificina, is sizeable and contains the aquatic worms, while the fourth, the earthworms or Lumbricina, unites the bulk of the order's families: Suborder H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annelid Genera
The annelids (Annelida , from Latin ', "little ring"), also known as the segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. Most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include earthworms) and leech-like species. Cladistic research since 1997 has radically changed this scheme, viewing leeches as a sub-group of oligochaetes and oligochaetes as a sub-group of polychaetes. In addition, the Pogonophora, Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-groups of polychaetes. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
