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 volzi Carl, 1906: 233-234 , figs 7-11 [ Sphaeropoeus ( Castanotherium ) ]. Sumatra ; Palembang ( Dr. Volz ); Indragiri ( G. Schneider ); Lahat ( Museum Genf ). Unspecified number of ♂ and ♀ . The MHNG collection contains two specimens in alcohol (MHNG-ARTO-18450). The specimens are accompanied by a vial containing telopods. One of the identification labels in the jar has “ ♂ Sumatra , Coll. W. Volz ” written on it, indicating that the specimens are syntypes . Carl’s original label does not give a locality, and it is possible that these specimens are really those listed as deposited in the MHNG in the original description and not specimens collected by Volz. The other syntypes are presumably in the NMBE . Castanotherium volzi ( Carl, 1906 ) , Zephroniidae