DIADOCIDIA Ruthe, 1831: 1210. Type species: Diadocidia flavicans Ruthe, 1831 [= Mycetobia ferruginosa Meigen, 1830], by monotypy.
MACRONEVRA Macquart, 1834: 146. Type species: Macronevra winthemi Macquart, 1834 [= Diadocidia ferruginosa ( Meigen, 1830)], by monotypy. Synonymy: Winnertz ( 1852).
ACLADA Loew, 1850: 33, 35. Type species: Diadocidia parallela Evenhuis, 1994, original designation. Aclada originally proposed without included species. The type species designated is from the first species included within the genus in accordance with the ICZN.
MACRONEURA Rondani, 1856: 197, 214 (unjustified emendation of Macronevra Macquart, 1834).
PALAEODOCIDIA Sasakawa, 2004: 208. Type species: Palaeodocidia ishizakii Sasakawa, 2004, original designation (see Notes under Diadocidia ishizakii). SYN. NOV.
Subgenus A DIDOCIDIA Laštovka & Matile, 1972
ADIDOCIDIA Laštovka & Matile, 1972: 218. Type species: Diadocidia valida Mik, 1874: 329, original designation.
Diadocidia (Adidocidia) borealis Coquillett, 1900 NEA Diadocidia borealis Coquillett, 1900: 390. TYPE LOCALITY: Canada (British Columbia) [H 3 in USNM]. DISTRIBUTION: NEARCTIC: Canada (British Columbia); USA (California, New Hampshire, North Carolina,
Oregon, South Carolina, Washington).
Diadocidia (Adidocidia) fissa Zaitzev, 1994 PAL Diadocidia fissa Zaitzev, 1994: 61. TYPE LOCALITY: Central European Russia (Kostroma Region) [H 3 in IEME].
DISTRIBUTION: PALAEARCTIC: Europe: Central European Russia (Kostroma Region).
Diadocidia (Adidocidia) ishizakii ( Sasakawa, 2004) COMB. NOV. PAL
Palaeodocidia ishizakii Sasakawa, 2004: 209. TYPE LOCALITY: Japan [H 3 in OMNH].
DISTRIBUTION: PALAEARCTIC: Asia: Japan.
Note: The genus Palaeodocidia Sasakawa, 2004 was delimited from Diadocidia based on the number of the flagellar segments, stated to be 14 in Palaeodocidia and 15 in Diadocidia. This was probably on the basis of “ 2 + 15 ” antennal segments being reported in error by Laštovka & Matile ( 1972). The number of flagellomeres in Diadocidia is actually 14. The first antennal flagellomere in Palaeodocidia is four times as long as wide and anepisternum setose as is typical of the subgenus Adidocidia.
Diadocidia (Adidocidia) macrosetigera Jaschhof & Jaschhof, 2007 AUS Diadocidia (Adidocidia) macrosetigera Jaschhof & Jaschhof, 2007 b: 64. TYPE LOCALITY: Australia (Queensland) [H 3 in ANIC].
DISTRIBUTION: AUSTRALASIAN/OCEANIAN: Australia (Queensland).
Diadocidia (Adidocidia) nigripalpis Edwards, 1940 NEO Diadocidia nigripalpis Edwards, 1940: 443. TYPE LOCALITY: Brazil [S 23, 1 Ƥ in BMNH]. DISTRIBUTION: NEOTROPICAL: Brazil (Santa Catarina), Costa Rica.
Diadocidia (Adidocidia) papua Ševčík, 2003 AUS Diadocidia (Adidocidia) papua Ševčík, 2003: 63. TYPE LOCALITY: Papua New Guinea [H 3 in BPBM]. DISTRIBUTION: AUSTRALASIAN/OCEANIAN: Papua New Guinea.
Diadocidia (Adidocidia) queenslandensis Jaschhof & Jaschhof, 2007 AUS Diadocidia (Adidocidia) queenslandensis Jaschhof & Jaschhof, 2007 b: 66. TYPE LOCALITY: Australia (Queensland) [H 3 in ANIC].
DISTRIBUTION: AUSTRALASIAN/OCEANIAN: Australia (Queensland).
Diadocidia (Adidocidia) stanfordensis Arnaud & Hoyt, 1956 NEA Diadocidia stanfordensis Arnaud & Hoyt, 1956: 87. TYPE LOCALITY: USA (California) [H 3 in CAS]. DISTRIBUTION: NEARCTIC: USA (California).
Diadocidia (Adidocidia) trispinosa Polevoi, 1996 PAL Diadocidia (Adidocidia) trispinosa Polevoi, 1996: 180. TYPE LOCALITY: Finland [H 3 in ZIS]. DISTRIBUTION: PALAEARCTIC: Europe: Czech Republic, Finland, Norway, North European Russia, Sweden. Note: Recorded from Czech Republic ( Ševčík 2001) and Norway ( Økland & Zaitzev 1997) as D. borealis
Coquillett.
Diadocidia (Adidocidia) valida Mik, 1874 PAL Diadocidia valida Mik, 1874: 329. TYPE LOCALITY: Austria [H Ƥ in NMW].
DISTRIBUTION: PALAEARCTIC: Europe: Austria, Azerbaijan, Bulgaria, Czech Republic, Estonia, Finland, France, Germany, Greece, Hungary, Latvia, Norway, Poland, North European Russia, Slovakia, Sweden, Switzerland, UK; Asia: West Siberia (Kemerovo Province, Krasnoyarsk Region).
Subgenus D IADOCIDIA Ruthe, 1831
Diadocidia (Diadocidia) bruneicola Ševčík in Papp & Ševčík, 2005 OR Diadocidia (Diadocidia) bruneicola Ševčík in Papp & Ševčík, 2005: 336. TYPE LOCALITY: Brunei [H 3 in BMNH].
DISTRIBUTION: ORIENTAL: Brunei.
Diadocidia (Diadocidia) cizeki Ševčík, 2003 AUS/OR Diadocidia (Diadocidia) cizeki Ševčík, 2003: 64. TYPE LOCALITY: Papua New Guinea [H 3 in BPBM]. DISTRIBUTION: ORIENTAL: Taiwan; AUSTRALASIAN/OCEANIAN: Papua New Guinea.
Note: Probably a synonym of Diadocidia sinica Wu, 1995. Male genitalia are very similar to those figured by Wu ( 1995: figs. 1-3).
Diadocidia (Diadocidia) ferruginosa ( Meigen, 1830) HOL
Mycetobia ferruginosa Meigen, 1830: 294. TYPE LOCALITY: Germany [H Ƥ in MNHN].
Diadocidia flavicans Ruthe, 1831: 1211. TYPE LOCALITY:? Germany [H Ƥ in? MDRG]. Synonymy: Winnertz ( 1852).
Macronevra winthemi Macquart, 1834: 147. TYPE LOCALITY: Germany [H in?]. Synonymy: Winnertz ( 1852).
DISTRIBUTION: PALAEARCTIC: Europe: Austria, Azerbaijan, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Macedonia, Norway, Poland, Romania, Central European Russia, North European Russia, Northwest European Russia, South European Russia, Slovakia, Spain, Sweden, Switzerland, The Netherlands, UK, Ukraine; Asia: West Siberia (Altai Region, Kemerovo Province, Krasnoyarsk Region), Russian Far East (Primorie Region, Sakhalin I.); NEARCTIC: Canada (Nova Scotia, Quebec), USA (California, Connecticut, Massachusetts, New Hampshire, New York, North Carolina, Pennsylvania, North Carolina, South Carolina, South Dakota, Washington.
Note: Fisher ( 1941) and Miller ( 1978) reported this species from North America ( Canada and USA), but the taxonomic status of North American specimens needs confirmation ( Laštovka & Matile 1972).
Diadocidia (Diadocidia) halopensis Ševčík, 2003 AUS Diadocidia (Diadocidia) halopensis Ševčík, 2003: 65. TYPE LOCALITY: Papua New Guinea [H 3 in BPBM]. DISTRIBUTION: AUSTRALASIAN/OCEANIAN: Papua New Guinea.
Diadocidia (Diadocidia) spinosula Tollet, 1948 PAL Diadocidia spinosula Tollet, 1948: 285. TYPE LOCALITY: Belgium [H 3 in KBIN].
DISTRIBUTION: PALAEARCTIC: Europe: Andorra, Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Montenegro, Norway, Poland, Romania, North European Russia, Northwest European Russia, Slovakia, Slovenia, Sweden, Switzerland, The Netherlands, UK; Asia: West Siberia (Altai Region, Kemerovo Province), Japan.
Diadocidia (Diadocidia) sulawesiana Ševčík in Papp & Ševčík, 2005 OR Diadocidia (Diadocidia) sulawesiana Ševčík in Papp & Ševčík, 2005: 338. TYPE LOCALITY: Sulawesi [H 3 in BMNH].
DISTRIBUTION: ORIENTAL: Indonesia (Sulawesi).
Diadocidia (Diadocidia) thoracica Okada, 1936 PAL Diadocidia ferruginosa f. thoracica Okada, 1936: 22. TYPE LOCALITY: Japan [L 3 in EIHU]. DISTRIBUTION: PALAEARCTIC: Asia: Japan.
Subgenus TA IDOCIDIA Papp & Šev č ík, 2005
TAIDOCIDIA Papp & Ševčík, 2005: 330. Type species: Diadocidia (Taidocidia) globosa Papp & Ševčík, 2005: 330, original designation.
Diadocidia (Taidocidia) globosa Papp & Ševčík, 2005 OR Diadocidia (Taidocidia) globosa Papp & Ševčík, 2005: 331. TYPE LOCALITY: Taiwan and Thailand [H 3 in HNHM].
DISTRIBUTION: ORIENTAL: Taiwan, Thailand.