TABLE 1. List of fossil species from the genus Helius with age and locality.

Species Age Locality
Helius miocenicus Krzemiński, 2002 Middle Miocene Stavropol, Caucasus, Russia
Helius stavropolensis Krzemiński, 2002 Middle Miocene Stavropol, Caucasus, Russia
Helius verticilis Krzemiński, 2002 Middle Miocene Stavropol, Caucasus, Russia
Helius qinghai n. sp Lower Miocene Caergen Village, China
Helius collemus Podenas and Poinar, 2012 Lower Miocene Dominicana
Helius neali Kopeć, Kania & Krzemiński, 2016 Lower Miocene Dominicana
Helius oosterbroeki Kopeć, Kania & Krzemiński, 2016 Lower Miocene Dominicana
Helius tenerus Statz, 1944 Late Oligocene Rott, Germany
Helius weigandi, Statz, 1944 Late Oligocene Rott, Germany
Helius constenius Krzemiński, 1991 Oligocene North Montana, USA
Helius formosus Krzemiński, 1993 Lower Eocene Baltic Area
Helius linus Podenas, 2002 Lower Eocene Baltic Area
Helius minutus (Loew, 1850) Lower Eocene Baltic Area
Helius mutus Podenas, 2002 Lower Eocene Baltic Area
Helius pulcher (Loew, 1850) Lower Eocene Baltic Area
Helius fossilis Kania, 2014 Lower Eocene Baltic Area
Helius similis Kania, 2014 Lower Eocene Baltic Area
Helius gedanicus Kania, 2014 Lower Eocene Baltic Area
Helius hoffeinsorum Kania, 2014 Lower Eocene Baltic Area
Helius botswanensis Rayner & Waters, 1990 Turonian (Cretaceous) Orapa, Botswana
Helius alavensis Kania, Krzemiński &Arillo, 2016 upper Albian (Cretaceous) Alava, Spain
Helius krzeminskii Ribeiro, 2002 Cenomanian (Cretaceous) Tanai village, Burma
Helius lebanensis Kania, Krzemiński &Azar, 2013 Lower Cretaceous Tannourine, North Lebanon,Hammana, Central Lebanon
Helius ewa Krzemiński, Kania & Azar, 2014 Lower Cretaceous Hammana, Central Lebanon