Rhysida

{{Short description|Genus of arthropods}}

{{About|the genus|the ransomware group|Rhysida (hacker group)}}

{{Automatic taxobox

| image = Rhysida nuda imported from iNaturalist photo 167540037 on 11 September 2022.jpg

| image_caption = Rhysida nuda

| image2 = Minor Blueleg Centipede imported from iNaturalist photo 29055196 on 23 December 2022.jpg

| image2_caption = Rhysida longipes

| taxon = Rhysida

| authority = Wood, 1862

| type_species = Branchiostoma lithobioides

| type_species_authority = Newport, 1845{{cite web |first1=Lucio |last1=Bonato |first2=Amazonas |last2=Chagas Junior |first3=Gregory D. |last3=Edgecombe |first4=John G. E. |last4=Lewis |first5=Alessandro |last5=Minelli |first6=Luis A. |last6=Pereira |first7=Rowland M. |last7=Shelley |first8=Pavel |last8=Stoev |first9=Marzio |last9=Zapparoli |year=2016 |url=https://chilobase.biologia.unipd.it/searches/result_genres/96 |title=Rhysida Wood, 1862 |website=ChiloBase 2.0 – A World Catalogue of Centipedes (Chilopoda) |access-date=26 November 2024}}

| synonyms = {{Species list

|Branchiostoma|Newport, 1845

|Ethmophorus|Pocock, 1891

|Ptychotrema|Peters, 1855

|Trematoptychus|Peters, 1862}}

| synonyms_ref =

}}

Rhysida is a large genus of Scolopendromorph centipedes in the subfamily Otostigminae.{{Cite web |title=Rhysida ceylonica Gravely 1912 names - Encyclopedia of Life |url=https://eol.org/pages/989035/names |access-date=2022-12-23 |website=eol.org}}{{Cite book |last1=Indian Museum. |url=https://www.biodiversitylibrary.org/item/41773 |title=Records of the Indian Museum |last2=Museum |first2=Indian |last3=India |first3=Zoological Survey of |date=1912 |publisher=Pub. by order of the trustees of the Indian Museum |volume=7 |location=Calcutta}} It is the second largest genus in the subfamily Otostigminae, with species found in the Neotropics, Indo-Malaya, and Africa.{{Cite journal |last=Chagas Junior |first=Amazonas |date=2013-01-14 |title=A redescription of Rhysida celeris (Humbert & Saussure, 1870), with a proposal of eight new synonyms (Scolopendromorpha, Scolopendridae, Otostigminae) |journal=ZooKeys |issue=258 |pages=17–29 |doi=10.3897/zookeys.258.4675 |issn=1313-2970 |pmc=3591754 |pmid=23653497|doi-access=free }} It shares some morphological characteristics with the genus Alluropus, and its phylogeny in the subfamily Otostigminae is somewhat uncertain.{{Cite journal |last1=Siriwut |first1=Warut |last2=Edgecombe |first2=Gregory D. |last3=Sutcharit |first3=Chirasak |last4=Tongkerd |first4=Piyoros |last5=Panha |first5=Somsak |last6=Siriwut |first6=Warut |last7=Edgecombe |first7=Gregory D. |last8=Sutcharit |first8=Chirasak |last9=Tongkerd |first9=Piyoros |last10=Panha |first10=Somsak |date=2018-10-04 |title=Systematic revision and phylogenetic reassessment of the centipede genera Rhysida Wood, 1862 and Alluropus Silvestri, 1912 (Chilopoda: Scolopendromorpha) in Southeast Asia, with further discussion of the subfamily Otostigminae |url=https://www.publish.csiro.au/is/IS17081 |journal=Invertebrate Systematics |language=en |volume=32 |issue=5 |pages=1005–1049 |doi=10.1071/IS17081 |s2cid=91788424 |issn=1447-2600|url-access=subscription }}