Aridulodrilus | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Annelida |
Clade: | Pleistoannelida |
Clade: | Sedentaria |
Class: | Clitellata |
Order: | Opisthopora |
Family: | Megascolecidae |
Genus: | Aridulodrilus |
Species: | A. molesworthae |
Binomial name | |
Aridulodrilus molesworthae Dyne, 2021 | |
Aridulodrilus molesworthae is a large Australian earthworm occurring, unusually, in a semiarid region of New South Wales. It was recognised as a species of Megascolecidae, a family with extreme diversity in the wetter coastal regions of the continent, but distinguished as a new monotypic genus Aridulodrilus, a name derived from Latin meaning a semi-desert worm. This animal was first recorded by a Broken Hill property's manager, Rosalind Molesworth, after substantial rain had brought them to the surface; the specific epithet molesworthae honours its discoverer. [1]
As a species greater than 250 mm in length, it is considered to be a large earthworm, specimens may be up to 1.5 metres when extended.
Aridulodrilus molesworthae is known at locations with low annual rainfall, an average of 260 mm, whereas most megascolecid species occur in areas receiving at least 400 mm rainfall isohyet. Their diet of microscopic organisms within the soil, rather than vegetive matter near the surface, may allow the species to subsist in a more arid environment. They are unknown outside its type locality, an area of ten hectares, [1] [2] in the IBRA Broken Hill Complex region. [3]
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Megascolecidae is a family of earthworms native to Madagascar, Australia, New Zealand, Asia, and North America. All species of the Megascolecidae belong to the Clitellata class. The Megascolecidae comprise a large family of earthworms and they can grow up to 2 meters in length. The intercontinental distribution of Megascolecidae species favours the continental drift theory.
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An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class Oligochaeta. In classical systems, they were in the order of Opisthopora since the male pores opened posterior to the female pores, although the internal male segments are anterior to the female. Theoretical cladistic studies have placed them in the suborder Lumbricina of the order Haplotaxida, but this may change. Other slang names for earthworms include "dew-worm", "rainworm", "nightcrawler", and "angleworm". Larger terrestrial earthworms are also called megadriles as opposed to the microdriles in the semiaquatic families Tubificidae, Lumbricidae and Enchytraeidae. The megadriles are characterized by a distinct clitellum and a vascular system with true capillaries.
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