Review of the millipede tribe Polydrepanini, with the description of a new species from Kerala state, southern India (Diplopoda, Polydesmida, Paradoxosomatidae, Alogolykinae) Author Golovatch, Sergei I. Institute for Problems of Ecology and Evolution, Russian Academy of Sciences, Leninsky pr. 33, Moscow 11907, Russia. Author Aswathy, Mathilakath Dasan 0000-0002-3904-8066 Centre for Animal Taxonomy and Ecology (CATE), Christ College, Irinjalakuda, Kerala, India. & aswathym. das 94 @ gmail. com; https: // orcid. org / 0000 - 0002 - 3904 - 8066 aswathym.das94@gmail.com Author Bhagirathan, Usha Author Sudhikumar, Ambalaparambil Vasu 0000-0002-4479-4995 Centre for Animal Taxonomy and Ecology (CATE), Christ College, Irinjalakuda, Kerala, India. & spidersudhi @ gmail. com; https: // orcid. org / 0000 - 0002 - 4479 - 4995 spidersudhi@gmail.com text Zootaxa 2021 2021-11-18 5068 4 485 516 journal article 3396 10.11646/zootaxa.5068.4.2 45ebb61b-259d-4ac3-bd7c-3a7da0f644f5 1175-5326 5709510 F769B986-8F7B-4ABF-A7EF-58A813718760 Genus Polydrepanum Carl, 1932 Type species: Polydrepanum tamilum Carl, 1932 , by monotypy. Taxonomic composition. Before providing a refined generic diagnosis, the species composition of Polydrepanum must be clarified, as this genus is perhaps the most ambiguous taxonomically amongst the Alogolykinae . Even though Sankaran and Sebastian (2018) have recently reviewed the genus, provided its diagnosis, described a new species, and gave a key to species, their results require revision. The following nominate Polydrepanum species have previously been distinguished, five of which are named and the remaining three unnamed. All of them are presented below in alphabetic order, also being catalogued, rediagnosed, illustrated, and commented upon as regards their present status. All four true Polydrepanum species are keyed as well.