''Isometrus'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

scorpion Scorpions are predatory arachnids of the order Scorpiones. They have eight legs, and are easily recognized by a pair of grasping pincers and a narrow, segmented tail, often carried in a characteristic forward curve over the back and always end ...

belonging and being

eponymous An eponym is a person, a place, or a thing after whom or which someone or something is, or is believed to be, named. The adjectives which are derived from the word eponym include ''eponymous'' and ''eponymic''. Usage of the word The term ''epon ...

to the family

Buthidae The Buthidae are the largest family of scorpions, containing about 100 genera and 1339 species as of 2022. A few very large genera (''Ananteris'', ''Centruroides'', '' Compsobuthus'', or '' Tityus'') are known, but a high number of species-poor o ...

. Some species are currently assigned to the genus ''Reddyanus''.

Distribution

The species of this genus are found in south and southeast

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

and in

Oceania Oceania (, , ) is a region, geographical region that includes Australasia, Melanesia, Micronesia, and Polynesia. Spanning the Eastern Hemisphere, Eastern and Western Hemisphere, Western hemispheres, Oceania is estimated to have a land area of ...

, with the exception of ''

Isometrus maculatus ''Isometrus maculatus'', commonly as the lesser brown scorpion, is a species of scorpion in the family Buthidae. Its distribution is pantropical; it is an introduced species in Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the We ...

'' which is pantropical.

Description

They are medium sized buthids, where the adults have a body length of 30 to 75 mm. Pedipalps are orthobothriotaxic. Chelal trichobothrium db is located between dt and et. There are 3 to 5 pairs of lateral eyes. Tibial spurs are absent on all legs. Movable and fixed fingers of pedipalps consists with six rows of granules.

Current species

* '' Isometrus amboli'' Sulakhe, 2020 * '' Isometrus antillanus'' Thorell, 1876 * '' Isometrus armatus'' Pocock, 1891 * '' Isometrus atherii'' Amir & Kamaluddin, 2008 * '' Isometrus atomarius'' Simon, 1884 * '' Isometrus bituberculatus'' Pocock, 1891 * '' Isometrus chinensis'' Karsch, 1879 * '' Isometrus devillei'' Becker, 1880 * '' Isometrus feae'' Thorell, 1889 * ''

Isometrus formosus ''Isometrus formosus'' is a species of scorpion in the family Buthidae. References Animals described in 1894 formosus Pope Formosus (896) was the bishop of Rome and ruler of the Papal States from 6 October 891 until his death on 4 April ...

'' Pocock, 1894 * '' Isometrus garyi'' Lourenço & Huber, 2002 * '' Isometrus gracilis'' Thorell, 1876 * '' Isometrus hainanensis'' Lourenço, Qi & Zhu, 2005 * '' Isometrus infuscatus'' Pocock, 1891 * '' Isometrus isadensis'' Tikader & Bastawade, 1983 * '' Isometrus kovariki'' Sulakhe, Dandekar, Mukherjee, Pandey, Ketkar, Padhye & Bastawade, 2020 * '' Isometrus lao'' Lourenço & Leguin, 2012 * '' Isometrus liaqatii'' Amir & Kamaluddin, 2008 * ''

'' (DeGeer, 1778) * '' Isometrus mesor'' Simon, 1884 * '' Isometrus pallidimanus'' Karsch, 1879 * '' Isometrus papuensis'' Werner, 1916 * '' Isometrus phipsoni'' Oates, 1888 * ''

Isometrus sonticus ''Isometrus'' is a genus of scorpion belonging and being eponymous to the family Buthidae. Some species are currently assigned to the genus ''Reddyanus''. Distribution The species of this genus are found in south and southeast Asia and in Oceani ...

'' Karsch, 1879 * '' Isometrus tamhini'' Sulakhe, Dandekar, Padhye & Bastawade, 2020 * '' Isometrus thorellii'' Koch & Keyserling, 1885 * '' Isometrus thurstoni'' Pocock, 1893 * '' Isometrus thwaitesi'' Pocock, 1897 * '' Isometrus weberi'' Karsch, 1882

Former species

All species are assigned to ''Reddyanus''. * '' Isometrus acanthurus'' Pocock, 1899 * '' Isometrus assamensis'' Oates, 1888 * '' Isometrus basilicus'' Karsch, 1879 * '' Isometrus besucheti'' Vachon, 1982 * '' Isometrus bilyi'' Kovařík, 2003 * '' Isometrus brachycentrus'' Pocock, 1899 * '' Isometrus corbeti'' Tikader & Batawade, 1983 * ''

Isometrus deharvengi ''Isometrus'' is a genus of scorpion belonging and being eponymous to the family Buthidae. Some species are currently assigned to the genus ''Reddyanus''. Distribution The species of this genus are found in south and southeast Asia and in Oceani ...

'' Lourenço & Duhem, 2010 * '' Isometrus heimi'' Vachon, 1976 * '' Isometrus khammamensis'' Kovařík, 2003 * '' Isometrus krasenskyi'' Kovařík, 1998 * '' Isometrus kurkai'' Kovařík, 1997 * '' Isometrus loebli'' Vachon, 1982 * '' Isometrus melanodactylus'' (L. Koch, 1867) * '' Isometrus navaiae'' Kovařík, 1998 * '' Isometrus petrzelkai'' Kovařík, 2003 * '' Isometrus problematicus'' Kovařík, 2003 * '' Isometrus rigidulus'' Pocock, 1897 * '' Isometrus tibetanus'' Lourenço & Zhu, 2008 * '' Isometrus vittatus'' Pocock, 1900 * '' Isometrus zideki'' Kovařík, 1994

References

* Ehrenberg, 1828 : ''Arachnoidea, Scorpiones.'' in Hemprich & Ehrenberg, ''Symbolae physicae seu icones et descriptiones animalium evertebratorum sepositis insectis quae ex itinere per Africanum borealem et Asiam occidentalem.'' Friderici Guielmi Hemprich et Christiani Godofredi Ehrenberg, studio novae aut illustratae redierunt. Percensuit editit Dr. C.G. Ehrehberg. Decas I. Berolini ex officina Academica, venditur a Mittlero, Berlin. *Sulakhe, Shauri & Dandekar, Nikhil & Mukherjee, Shomen & Pandey, Malay & Ketkar, Makarand & Padhye, Anand & Bastawade, Deshabhushan. (2020). A new species of Isometrus (Scorpiones: Buthidae) from southern India. 310. 1-13. * * {{Taxonbar, from=Q3155540 Taxa named by Christian Gottfried Ehrenberg