An annotated list of the millipede (Diplopoda) species described by Johann Carl Author Hollier, John Muséum d’histoire naturelle, C. P. 6434, CH- 1211 Genève 6, Switzerland. E-mail: john. hollier @ ville-ge. ch john.hollier@ville-ge.ch Author Stöckli, Eduard Naturhistorisches Museum Basel, Augustinergasse 2, CH- 4051 Basel, Switzerland. E-mail: eduard. stoeckli @ bs. ch eduard.stoeckli@bs.ch Author Wesener, Thomas Zoologisches Forschungsmuseum Alexander Koenig, Leibniz Institute for Animal Biodiversity, Adenauerallee 160, D- 53113 Bonn, Germany. E-mail: T. Wesener @ leibniz-zfmk. de esener@leibniz-zfmk.de Author Mesibov, Robert West Ulverstone, Tasmania, Australia 7315. E-mail: robert. mesibov @ gmail. com robert.mesibov@gmail.com Author Decker, Peter Senckenberg Museum für Naturkunde Görlitz, Department of Soil Zoology, Am Museum 1, D- 02826 Görlitz, Germany. E-mail: peter. decker @ senckenberg. de peter.decker@senckenberg.de Author Sierwald, Petra Field Museum of Natural History, 1400 S. Lake Shore Drive, Chicago, IL 60605, USA. E-mail: psierwald @ fmnh. org psierwald@fmnh.org text Revue suisse de Zoologie 2020 2020-06-04 127 1 183 240 http://dx.doi.org/10.35929/rsz.0015 journal article 10.35929/RSZ.0015 0035-418 5743454 socialis Carl, 1912c: 139-142 , pl. 5, figs 13-15 [ Prionopeltis ]. Bontorio, Süd-Celebes (Dr J. Elbert). Unspecified number of ♂ and ♀ . The MHNG collection contains four specimens in alcohol in two vials. The first vial (MHNG-ARTO-14307) contains three specimens , each with a pin running the length of the body, an identification label with “Bontorio, Celebes mér. ex coll. Sarasin [sic]” written on it and a label “species 1”. The other vial (MHNG-ARTO-14308) contains a single specimen with the label “species 2”. The identification label in the jar has “ type ” written on it, indicating that the specimens are syntypes . A handwritten note in the jar indicates that Jeekel examined the specimens in 1976 and concluded that they were not conspecific. There are 16 further syntypes in the NMB (inventory number NMB-DIPL-00133a, NMB- DIPL-00134a and NMB-DIPL-00135a) under the name Pratinus socialis (Carl) . Gigantomorpha socialis (Carl, 1912) , Paradoxosomatidae