- Locusta maxillosa Fabricius, 1775: 284.
Syntype; cc8a7702-030b-4830-8bd0-a478d312d63e; America
- Conocephalus maxillosus (Fabricius, 1775) in Serville, 1831: 149.
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- Conocephalus maxillosus (Fabricius, 1775) in Serville, 1838: 520.
- Locusta maxillosa Fabricius, 1775 in Blanchard, 1840: 25.
- Conocephalus abbreviatus Walker, 1869: 327.
Holotype; female; 71373c02-9380-410b-b2fd-f9ece99bab6e; deposited at: Natural History Museum, London (NHMUK); unknown
- Conocephalus viridator Walker, 1869: 308.
Holotype; male; 342950ca-c628-4e5a-b575-f3cbccc1dc39; deposited at: Natural History Museum, London (NHMUK); Honduras
- Conocephalus heteropus Bolívar, 1881: 496.
Syntype; female; 62c5435f-bf02-49dc-8a3b-f42affaa7bb2; Brazil: Bahia: Itaparica
- Conocephalus muticus Redtenbacher, 1891: 393.
Syntype; male; NMW 18749; deposited at: Naturhistorisches Museum, Wien (NMW); Saint Vincent. Syntype; d6ec37e0-60ff-42ea-bc0c-1b51bc2a4079; deposited at: Naturhistorisches Museum, Wien (NMW); Cuba
- Conocephalus heteropus Bolívar, 1881 in Redtenbacher, 1891: 400.
- Conocephalus maxillosus (Fabricius, 1775) in Redtenbacher, 1891: 396.
- Conocephalus heteropus Bolívar, 1881 in Brunner von Wattenwyl & Redtenbacher, 1892: 215.
- Conocephalus muticus Redtenbacher, 1891 in Brunner von Wattenwyl & Redtenbacher, 1892: 214.
- Conocephalus maxillosus (Fabricius, 1775) in Brunner von Wattenwyl & Redtenbacher, 1892: 214.
- Conocephalus muticus Redtenbacher, 1891 in Brunner von Wattenwyl, 1893: 608.
- Conocephalus maxillosus (Fabricius, 1775) in Brunner von Wattenwyl, 1893: 608.
- Conocephalus muticus Redtenbacher, 1891 in Griffini, 1896: 26.
- Conocephalus maxillosus (Fabricius, 1775) in Bolívar, 1896: 18.
- Conocephalus maxillosus (Fabricius, 1775) in Giglio-Tos, 1898: 87.
- Conocephalus muticus Redtenbacher, 1891 in Rehn, 1905: 824.
- Conocephalus abbreviatus Walker, 1869 (subjective synonym of Locusta maxillosa Fabricius, 1775) in Kirby, 1906: 244.
- Conocephalus muticus Redtenbacher, 1891 (subjective synonym of Locusta maxillosa Fabricius, 1775) in Kirby, 1906: 244.
- Conocephalus viridator Walker, 1869 (subjective synonym of Locusta maxillosa Fabricius, 1775) in Kirby, 1906: 244.
- Conocephaloides maxillosus (Fabricius, 1775) in Kirby, 1906: 243.
- Conocephaloides heteropus (Bolívar, 1881) in Kirby, 1906: 245.
- Conocephalus (Neoconocephalus) maxillosus (Fabricius, 1775) in Karny, 1907: 25, 33.
- Conocephaloides maxillosus (Fabricius, 1775) in Rehn, 1907: 390.
- Neoconocephalus maxillosus (Fabricius, 1775) in Rehn, 1910: 7.
- Conocephalus heteropus Bolívar, 1881 in Karny, 1912: 31.
- Conocephalus muticus Redtenbacher, 1891 in Rehn, 1913: 374.
- Conocephalus heteropus Bolívar, 1881 in Bruner, 1915: 394.
- Conocephalus muticus Redtenbacher, 1891 in Bruner, 1915: 392.
- Neoconocephalus maxillosus (Fabricius, 1775) in Bruner, 1915: 393.
- Conocephalus heteropus Bolívar, 1881 in Rehn, 1917: 114.
- Conocephalus heteropus Bolívar, 1881 (subjective synonym of Locusta maxillosa Fabricius, 1775) in Hebard, 1927: 336.
- Neoconocephalus maxillosus (Fabricius, 1775) in Hebard, 1927: 336.
- Neoconocephalus maxillosus (Fabricius, 1775) in Hebard, 1927: 135.
- Neoconocephalus maxillosus (Fabricius, 1775) in Hebard, 1932: 331.
- Neoconocephalus maxillosus (Fabricius, 1775) in Hebard, 1933: 62.
- Neoconocephalus maxillosus (Fabricius, 1775) in Ebner, 1953: 10.
- Neoconocephalus maxillosus (Fabricius, 1775) in Walker & Whitesell, 1978
- Neoconocephalus maxillosus (Fabricius, 1775) in Walker & Greenfield, 1983: 377.
- Neoconocephalus maxillosus (Fabricius, 1775) in Nickle, 1992: 179.
- Conocephalus heteropus Bolívar, 1881 (subjective synonym of Locusta maxillosa Fabricius, 1775) in Paris, 1994: 188.
- Conocephalus abbreviatus Walker, 1869 (subjective synonym of Locusta maxillosa Fabricius, 1775) in Otte, 1997: 60.
- Neoconocephalus maxillosus (Fabricius, 1775) in Elgueta, Camousseight & Carbonell, 1999: 14.
- Neoconocephalus maxillosus (Fabricius, 1775) in Perez-Gelabert, 2001: 68.